/usr/bin/java -Xmx16000000000 -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/test/hard1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-06 00:39:27,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-06 00:39:27,822 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-06 00:39:27,853 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-06 00:39:27,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-06 00:39:27,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-06 00:39:27,858 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-06 00:39:27,862 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-06 00:39:27,863 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-06 00:39:27,866 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-06 00:39:27,867 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-06 00:39:27,868 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-06 00:39:27,868 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-06 00:39:27,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-06 00:39:27,870 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-06 00:39:27,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-06 00:39:27,873 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-06 00:39:27,874 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-06 00:39:27,875 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-06 00:39:27,879 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-06 00:39:27,880 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-06 00:39:27,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-06 00:39:27,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-06 00:39:27,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-06 00:39:27,887 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-06 00:39:27,888 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-06 00:39:27,888 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-06 00:39:27,889 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-06 00:39:27,889 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-06 00:39:27,890 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-06 00:39:27,890 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-06 00:39:27,890 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-06 00:39:27,891 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-06 00:39:27,892 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-06 00:39:27,892 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-06 00:39:27,892 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-06 00:39:27,893 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-06 00:39:27,893 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-06 00:39:27,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-06 00:39:27,893 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-06 00:39:27,894 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-06 00:39:27,897 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 [2021-06-06 00:39:27,924 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-06 00:39:27,924 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-06 00:39:27,925 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-06 00:39:27,925 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-06 00:39:27,926 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-06 00:39:27,926 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-06 00:39:27,927 INFO L138 SettingsManager]: * Use SBE=true [2021-06-06 00:39:27,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-06 00:39:27,927 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-06 00:39:27,927 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-06 00:39:27,928 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-06 00:39:27,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-06 00:39:27,928 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-06 00:39:27,928 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-06 00:39:27,928 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-06 00:39:27,928 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-06 00:39:27,928 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-06 00:39:27,928 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-06 00:39:27,929 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-06 00:39:27,929 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-06 00:39:27,929 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-06 00:39:27,929 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-06 00:39:27,929 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-06 00:39:27,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-06 00:39:27,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-06 00:39:27,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-06 00:39:27,929 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-06 00:39:27,930 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-06 00:39:27,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-06 00:39:27,930 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-06 00:39:27,930 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-06 00:39:27,930 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-06 00:39:28,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-06 00:39:28,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-06 00:39:28,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-06 00:39:28,195 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-06 00:39:28,196 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-06 00:39:28,196 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/hard1.wvr.bpl [2021-06-06 00:39:28,196 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/hard1.wvr.bpl' [2021-06-06 00:39:28,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-06 00:39:28,224 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-06 00:39:28,225 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-06 00:39:28,225 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-06 00:39:28,225 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-06 00:39:28,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:39:28" (1/1) ... [2021-06-06 00:39:28,240 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:39:28" (1/1) ... [2021-06-06 00:39:28,247 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-06 00:39:28,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-06 00:39:28,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-06 00:39:28,250 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-06 00:39:28,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:39:28" (1/1) ... [2021-06-06 00:39:28,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:39:28" (1/1) ... [2021-06-06 00:39:28,256 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:39:28" (1/1) ... [2021-06-06 00:39:28,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:39:28" (1/1) ... [2021-06-06 00:39:28,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:39:28" (1/1) ... [2021-06-06 00:39:28,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:39:28" (1/1) ... [2021-06-06 00:39:28,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:39:28" (1/1) ... [2021-06-06 00:39:28,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-06 00:39:28,267 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-06 00:39:28,267 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-06 00:39:28,267 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-06 00:39:28,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:39:28" (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 [2021-06-06 00:39:28,324 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-06 00:39:28,325 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-06 00:39:28,325 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-06 00:39:28,325 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-06 00:39:28,325 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-06 00:39:28,325 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-06 00:39:28,325 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-06 00:39:28,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-06 00:39:28,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-06 00:39:28,326 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-06 00:39:28,326 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-06 00:39:28,326 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-06 00:39:28,326 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-06 00:39:28,326 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-06 00:39:28,326 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-06 00:39:28,327 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-06 00:39:28,515 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-06 00:39:28,515 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-06 00:39:28,516 INFO L202 PluginConnector]: Adding new model hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.06 12:39:28 BoogieIcfgContainer [2021-06-06 00:39:28,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-06 00:39:28,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-06 00:39:28,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-06 00:39:28,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-06 00:39:28,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:39:28" (1/2) ... [2021-06-06 00:39:28,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3502b79e and model type hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.06 12:39:28, skipping insertion in model container [2021-06-06 00:39:28,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.06 12:39:28" (2/2) ... [2021-06-06 00:39:28,521 INFO L111 eAbstractionObserver]: Analyzing ICFG hard1.wvr.bpl [2021-06-06 00:39:28,525 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-06 00:39:28,525 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-06 00:39:28,525 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-06 00:39:28,525 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-06 00:39:28,600 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-06 00:39:28,635 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-06 00:39:28,663 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-06 00:39:28,663 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-06 00:39:28,663 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-06 00:39:28,663 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-06 00:39:28,663 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-06 00:39:28,663 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-06 00:39:28,663 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-06 00:39:28,663 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-06 00:39:28,673 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 42 places, 33 transitions, 98 flow [2021-06-06 00:39:28,714 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:28,717 INFO L276 IsEmpty]: Start isEmpty. Operand has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:28,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:28,734 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:28,734 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:28,735 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:28,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:28,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1363796692, now seen corresponding path program 1 times [2021-06-06 00:39:28,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:28,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069000080] [2021-06-06 00:39:28,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:28,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:28,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:28,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069000080] [2021-06-06 00:39:28,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069000080] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:28,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:28,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-06 00:39:28,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312597887] [2021-06-06 00:39:28,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-06 00:39:28,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:28,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-06 00:39:28,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-06 00:39:28,904 INFO L87 Difference]: Start difference. First operand has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 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 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:28,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:28,978 INFO L93 Difference]: Finished difference Result 854 states and 3302 transitions. [2021-06-06 00:39:28,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-06 00:39:28,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2021-06-06 00:39:28,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:28,995 INFO L225 Difference]: With dead ends: 854 [2021-06-06 00:39:28,996 INFO L226 Difference]: Without dead ends: 823 [2021-06-06 00:39:28,997 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-06 00:39:29,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-06-06 00:39:29,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 558. [2021-06-06 00:39:29,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.8545780969479355) internal successors, (2147), 557 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:29,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 2147 transitions. [2021-06-06 00:39:29,087 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 2147 transitions. Word has length 19 [2021-06-06 00:39:29,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:29,087 INFO L482 AbstractCegarLoop]: Abstraction has 558 states and 2147 transitions. [2021-06-06 00:39:29,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:29,088 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 2147 transitions. [2021-06-06 00:39:29,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-06 00:39:29,091 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:29,091 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:29,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-06 00:39:29,092 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:29,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:29,094 INFO L82 PathProgramCache]: Analyzing trace with hash -669454164, now seen corresponding path program 1 times [2021-06-06 00:39:29,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:29,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226794848] [2021-06-06 00:39:29,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:29,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:29,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:29,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:29,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226794848] [2021-06-06 00:39:29,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226794848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:29,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661448220] [2021-06-06 00:39:29,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-06 00:39:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:29,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-06 00:39:29,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:29,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:29,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661448220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:29,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:29,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-06 00:39:29,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189758339] [2021-06-06 00:39:29,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-06 00:39:29,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:29,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-06 00:39:29,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:39:29,289 INFO L87 Difference]: Start difference. First operand 558 states and 2147 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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) [2021-06-06 00:39:29,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:29,406 INFO L93 Difference]: Finished difference Result 1573 states and 5792 transitions. [2021-06-06 00:39:29,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-06 00:39:29,406 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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 21 [2021-06-06 00:39:29,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:29,414 INFO L225 Difference]: With dead ends: 1573 [2021-06-06 00:39:29,414 INFO L226 Difference]: Without dead ends: 1573 [2021-06-06 00:39:29,415 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:39:29,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2021-06-06 00:39:29,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 863. [2021-06-06 00:39:29,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.960556844547564) internal successors, (3414), 862 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:29,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 3414 transitions. [2021-06-06 00:39:29,462 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 3414 transitions. Word has length 21 [2021-06-06 00:39:29,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:29,462 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 3414 transitions. [2021-06-06 00:39:29,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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) [2021-06-06 00:39:29,462 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 3414 transitions. [2021-06-06 00:39:29,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-06 00:39:29,464 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:29,464 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:29,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-06 00:39:29,678 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:29,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:29,678 INFO L82 PathProgramCache]: Analyzing trace with hash 421259310, now seen corresponding path program 1 times [2021-06-06 00:39:29,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:29,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587321193] [2021-06-06 00:39:29,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:29,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:29,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:29,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587321193] [2021-06-06 00:39:29,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587321193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:29,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735534919] [2021-06-06 00:39:29,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-06 00:39:29,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:29,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-06 00:39:29,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:29,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:29,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735534919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:29,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:29,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-06 00:39:29,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091201721] [2021-06-06 00:39:29,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-06 00:39:29,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:29,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-06 00:39:29,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:39:29,794 INFO L87 Difference]: Start difference. First operand 863 states and 3414 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:29,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:29,880 INFO L93 Difference]: Finished difference Result 1748 states and 6572 transitions. [2021-06-06 00:39:29,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-06 00:39:29,881 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-06 00:39:29,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:29,889 INFO L225 Difference]: With dead ends: 1748 [2021-06-06 00:39:29,889 INFO L226 Difference]: Without dead ends: 1748 [2021-06-06 00:39:29,889 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:39:29,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-06-06 00:39:29,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 927. [2021-06-06 00:39:29,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 926 states have (on average 3.970842332613391) internal successors, (3677), 926 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:29,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 3677 transitions. [2021-06-06 00:39:29,921 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 3677 transitions. Word has length 21 [2021-06-06 00:39:29,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:29,921 INFO L482 AbstractCegarLoop]: Abstraction has 927 states and 3677 transitions. [2021-06-06 00:39:29,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:29,922 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 3677 transitions. [2021-06-06 00:39:29,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-06 00:39:29,924 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:29,924 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:30,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:30,144 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:30,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:30,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1822537518, now seen corresponding path program 1 times [2021-06-06 00:39:30,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:30,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577725647] [2021-06-06 00:39:30,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:30,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:30,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:30,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:30,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577725647] [2021-06-06 00:39:30,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577725647] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:30,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:30,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-06 00:39:30,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775358386] [2021-06-06 00:39:30,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:39:30,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:30,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:39:30,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:39:30,187 INFO L87 Difference]: Start difference. First operand 927 states and 3677 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:30,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:30,253 INFO L93 Difference]: Finished difference Result 997 states and 3621 transitions. [2021-06-06 00:39:30,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-06 00:39:30,254 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-06 00:39:30,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:30,258 INFO L225 Difference]: With dead ends: 997 [2021-06-06 00:39:30,258 INFO L226 Difference]: Without dead ends: 884 [2021-06-06 00:39:30,258 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:39:30,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-06-06 00:39:30,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 808. [2021-06-06 00:39:30,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.758364312267658) internal successors, (3033), 807 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) [2021-06-06 00:39:30,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 3033 transitions. [2021-06-06 00:39:30,281 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 3033 transitions. Word has length 21 [2021-06-06 00:39:30,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:30,282 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 3033 transitions. [2021-06-06 00:39:30,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:30,282 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 3033 transitions. [2021-06-06 00:39:30,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-06 00:39:30,285 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:30,285 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:30,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-06 00:39:30,286 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:30,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:30,287 INFO L82 PathProgramCache]: Analyzing trace with hash -2021695698, now seen corresponding path program 2 times [2021-06-06 00:39:30,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:30,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600230555] [2021-06-06 00:39:30,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:30,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:30,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:30,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600230555] [2021-06-06 00:39:30,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600230555] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:30,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:30,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-06 00:39:30,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984653578] [2021-06-06 00:39:30,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:39:30,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:30,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:39:30,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:39:30,336 INFO L87 Difference]: Start difference. First operand 808 states and 3033 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:30,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:30,384 INFO L93 Difference]: Finished difference Result 949 states and 3541 transitions. [2021-06-06 00:39:30,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-06 00:39:30,385 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-06 00:39:30,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:30,411 INFO L225 Difference]: With dead ends: 949 [2021-06-06 00:39:30,412 INFO L226 Difference]: Without dead ends: 949 [2021-06-06 00:39:30,412 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:39:30,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-06-06 00:39:30,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 729. [2021-06-06 00:39:30,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 3.782967032967033) internal successors, (2754), 728 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) [2021-06-06 00:39:30,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2754 transitions. [2021-06-06 00:39:30,429 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2754 transitions. Word has length 21 [2021-06-06 00:39:30,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:30,429 INFO L482 AbstractCegarLoop]: Abstraction has 729 states and 2754 transitions. [2021-06-06 00:39:30,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:30,429 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2754 transitions. [2021-06-06 00:39:30,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:39:30,432 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:30,432 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:30,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-06 00:39:30,432 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:30,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:30,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1964497838, now seen corresponding path program 1 times [2021-06-06 00:39:30,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:30,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293568134] [2021-06-06 00:39:30,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:30,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:30,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293568134] [2021-06-06 00:39:30,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293568134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:30,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918793227] [2021-06-06 00:39:30,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-06 00:39:30,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:30,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-06 00:39:30,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:30,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:30,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918793227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:30,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:30,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-06-06 00:39:30,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370598207] [2021-06-06 00:39:30,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-06 00:39:30,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:30,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-06 00:39:30,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:39:30,603 INFO L87 Difference]: Start difference. First operand 729 states and 2754 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2021-06-06 00:39:30,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:30,688 INFO L93 Difference]: Finished difference Result 1389 states and 5122 transitions. [2021-06-06 00:39:30,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:39:30,688 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 23 [2021-06-06 00:39:30,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:30,694 INFO L225 Difference]: With dead ends: 1389 [2021-06-06 00:39:30,694 INFO L226 Difference]: Without dead ends: 1389 [2021-06-06 00:39:30,695 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:39:30,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2021-06-06 00:39:30,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 892. [2021-06-06 00:39:30,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.772166105499439) internal successors, (3361), 891 states have internal predecessors, (3361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:30,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3361 transitions. [2021-06-06 00:39:30,716 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3361 transitions. Word has length 23 [2021-06-06 00:39:30,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:30,716 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 3361 transitions. [2021-06-06 00:39:30,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2021-06-06 00:39:30,717 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3361 transitions. [2021-06-06 00:39:30,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:39:30,718 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:30,719 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:30,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:30,933 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:30,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:30,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1231348690, now seen corresponding path program 1 times [2021-06-06 00:39:30,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:30,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121070360] [2021-06-06 00:39:30,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:30,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:30,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:30,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121070360] [2021-06-06 00:39:30,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121070360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:30,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525210537] [2021-06-06 00:39:30,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-06 00:39:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:31,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:39:31,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:31,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:31,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525210537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:31,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:31,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-06 00:39:31,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86517500] [2021-06-06 00:39:31,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-06 00:39:31,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:31,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-06 00:39:31,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:39:31,072 INFO L87 Difference]: Start difference. First operand 892 states and 3361 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-06-06 00:39:31,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:31,116 INFO L93 Difference]: Finished difference Result 1781 states and 6589 transitions. [2021-06-06 00:39:31,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-06 00:39:31,116 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-06-06 00:39:31,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:31,124 INFO L225 Difference]: With dead ends: 1781 [2021-06-06 00:39:31,124 INFO L226 Difference]: Without dead ends: 1738 [2021-06-06 00:39:31,125 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:39:31,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2021-06-06 00:39:31,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1055. [2021-06-06 00:39:31,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 3.8055028462998104) internal successors, (4011), 1054 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:31,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 4011 transitions. [2021-06-06 00:39:31,152 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 4011 transitions. Word has length 23 [2021-06-06 00:39:31,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:31,152 INFO L482 AbstractCegarLoop]: Abstraction has 1055 states and 4011 transitions. [2021-06-06 00:39:31,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-06-06 00:39:31,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 4011 transitions. [2021-06-06 00:39:31,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:39:31,155 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:31,155 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:31,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:31,369 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:31,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:31,369 INFO L82 PathProgramCache]: Analyzing trace with hash -516640296, now seen corresponding path program 2 times [2021-06-06 00:39:31,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:31,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538157938] [2021-06-06 00:39:31,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:31,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:31,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:31,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:31,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538157938] [2021-06-06 00:39:31,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538157938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:31,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753700986] [2021-06-06 00:39:31,405 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 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 [2021-06-06 00:39:31,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:39:31,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:31,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:39:31,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:31,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:31,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753700986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:31,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:31,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-06 00:39:31,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28184941] [2021-06-06 00:39:31,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-06 00:39:31,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:31,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-06 00:39:31,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:39:31,491 INFO L87 Difference]: Start difference. First operand 1055 states and 4011 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-06-06 00:39:31,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:31,541 INFO L93 Difference]: Finished difference Result 1504 states and 5657 transitions. [2021-06-06 00:39:31,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-06 00:39:31,542 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-06-06 00:39:31,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:31,548 INFO L225 Difference]: With dead ends: 1504 [2021-06-06 00:39:31,548 INFO L226 Difference]: Without dead ends: 1461 [2021-06-06 00:39:31,549 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:39:31,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2021-06-06 00:39:31,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1067. [2021-06-06 00:39:31,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 3.8227016885553473) internal successors, (4075), 1066 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:31,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 4075 transitions. [2021-06-06 00:39:31,574 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 4075 transitions. Word has length 23 [2021-06-06 00:39:31,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:31,575 INFO L482 AbstractCegarLoop]: Abstraction has 1067 states and 4075 transitions. [2021-06-06 00:39:31,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-06-06 00:39:31,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 4075 transitions. [2021-06-06 00:39:31,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:39:31,577 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:31,577 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:31,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:31,792 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:31,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:31,793 INFO L82 PathProgramCache]: Analyzing trace with hash -28423604, now seen corresponding path program 3 times [2021-06-06 00:39:31,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:31,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292904722] [2021-06-06 00:39:31,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:31,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:31,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:39:31,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:31,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292904722] [2021-06-06 00:39:31,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292904722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:31,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862462141] [2021-06-06 00:39:31,839 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 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 [2021-06-06 00:39:31,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:39:31,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:31,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:39:31,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:31,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:39:31,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862462141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:31,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:31,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-06 00:39:31,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682010445] [2021-06-06 00:39:31,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-06 00:39:31,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:31,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-06 00:39:31,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:39:31,939 INFO L87 Difference]: Start difference. First operand 1067 states and 4075 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-06-06 00:39:31,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:31,985 INFO L93 Difference]: Finished difference Result 1444 states and 5469 transitions. [2021-06-06 00:39:31,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-06 00:39:31,986 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-06-06 00:39:31,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:31,991 INFO L225 Difference]: With dead ends: 1444 [2021-06-06 00:39:31,992 INFO L226 Difference]: Without dead ends: 1401 [2021-06-06 00:39:31,992 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:39:31,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-06-06 00:39:32,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1086. [2021-06-06 00:39:32,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 3.8359447004608294) internal successors, (4162), 1085 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:32,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 4162 transitions. [2021-06-06 00:39:32,019 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 4162 transitions. Word has length 23 [2021-06-06 00:39:32,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:32,019 INFO L482 AbstractCegarLoop]: Abstraction has 1086 states and 4162 transitions. [2021-06-06 00:39:32,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-06-06 00:39:32,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 4162 transitions. [2021-06-06 00:39:32,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:39:32,022 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:32,023 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:32,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:32,237 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:32,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:32,237 INFO L82 PathProgramCache]: Analyzing trace with hash -725562960, now seen corresponding path program 1 times [2021-06-06 00:39:32,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:32,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439251972] [2021-06-06 00:39:32,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:32,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:32,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:32,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439251972] [2021-06-06 00:39:32,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439251972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:32,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667930123] [2021-06-06 00:39:32,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-06 00:39:32,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:32,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:39:32,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:32,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667930123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:32,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:32,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-06 00:39:32,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363295517] [2021-06-06 00:39:32,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-06 00:39:32,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:32,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-06 00:39:32,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:39:32,380 INFO L87 Difference]: Start difference. First operand 1086 states and 4162 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-06-06 00:39:32,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:32,434 INFO L93 Difference]: Finished difference Result 2517 states and 9613 transitions. [2021-06-06 00:39:32,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-06 00:39:32,435 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-06-06 00:39:32,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:32,445 INFO L225 Difference]: With dead ends: 2517 [2021-06-06 00:39:32,446 INFO L226 Difference]: Without dead ends: 2474 [2021-06-06 00:39:32,446 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:39:32,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-06-06 00:39:32,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 1252. [2021-06-06 00:39:32,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1252 states, 1251 states have (on average 3.906474820143885) internal successors, (4887), 1251 states have internal predecessors, (4887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:32,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 4887 transitions. [2021-06-06 00:39:32,483 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 4887 transitions. Word has length 23 [2021-06-06 00:39:32,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:32,483 INFO L482 AbstractCegarLoop]: Abstraction has 1252 states and 4887 transitions. [2021-06-06 00:39:32,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-06-06 00:39:32,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 4887 transitions. [2021-06-06 00:39:32,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:39:32,486 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:32,486 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:32,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-06 00:39:32,702 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:32,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:32,703 INFO L82 PathProgramCache]: Analyzing trace with hash 2110243560, now seen corresponding path program 2 times [2021-06-06 00:39:32,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:32,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561927644] [2021-06-06 00:39:32,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:32,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:32,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:39:32,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:32,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561927644] [2021-06-06 00:39:32,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561927644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:32,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810195369] [2021-06-06 00:39:32,750 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 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 [2021-06-06 00:39:32,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:39:32,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:32,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:39:32,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:32,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:39:32,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810195369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:32,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:32,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-06 00:39:32,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610401744] [2021-06-06 00:39:32,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-06 00:39:32,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:32,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-06 00:39:32,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:39:32,857 INFO L87 Difference]: Start difference. First operand 1252 states and 4887 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-06-06 00:39:32,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:32,913 INFO L93 Difference]: Finished difference Result 2128 states and 8197 transitions. [2021-06-06 00:39:32,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-06 00:39:32,913 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-06-06 00:39:32,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:32,918 INFO L225 Difference]: With dead ends: 2128 [2021-06-06 00:39:32,918 INFO L226 Difference]: Without dead ends: 2085 [2021-06-06 00:39:32,918 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:39:32,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2021-06-06 00:39:32,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 1324. [2021-06-06 00:39:32,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.9554043839758126) internal successors, (5233), 1323 states have internal predecessors, (5233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:32,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 5233 transitions. [2021-06-06 00:39:32,945 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 5233 transitions. Word has length 23 [2021-06-06 00:39:32,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:32,945 INFO L482 AbstractCegarLoop]: Abstraction has 1324 states and 5233 transitions. [2021-06-06 00:39:32,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-06-06 00:39:32,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 5233 transitions. [2021-06-06 00:39:32,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:39:32,948 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:32,948 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:33,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-06 00:39:33,161 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:33,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:33,161 INFO L82 PathProgramCache]: Analyzing trace with hash 338647000, now seen corresponding path program 3 times [2021-06-06 00:39:33,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:33,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296444808] [2021-06-06 00:39:33,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:33,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:39:33,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:33,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296444808] [2021-06-06 00:39:33,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296444808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:33,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979108345] [2021-06-06 00:39:33,198 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 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 [2021-06-06 00:39:33,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:39:33,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:33,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:39:33,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:33,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:39:33,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979108345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:33,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:33,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-06 00:39:33,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711720627] [2021-06-06 00:39:33,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-06 00:39:33,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:33,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-06 00:39:33,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:39:33,286 INFO L87 Difference]: Start difference. First operand 1324 states and 5233 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-06-06 00:39:33,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:33,347 INFO L93 Difference]: Finished difference Result 2247 states and 8749 transitions. [2021-06-06 00:39:33,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-06 00:39:33,347 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-06-06 00:39:33,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:33,352 INFO L225 Difference]: With dead ends: 2247 [2021-06-06 00:39:33,352 INFO L226 Difference]: Without dead ends: 2204 [2021-06-06 00:39:33,352 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:39:33,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-06-06 00:39:33,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 1380. [2021-06-06 00:39:33,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.989122552574329) internal successors, (5501), 1379 states have internal predecessors, (5501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:33,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 5501 transitions. [2021-06-06 00:39:33,380 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 5501 transitions. Word has length 23 [2021-06-06 00:39:33,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:33,380 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 5501 transitions. [2021-06-06 00:39:33,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-06-06 00:39:33,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 5501 transitions. [2021-06-06 00:39:33,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:39:33,383 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:33,383 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:33,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:33,601 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:33,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:33,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1032459728, now seen corresponding path program 1 times [2021-06-06 00:39:33,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:33,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037137251] [2021-06-06 00:39:33,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:33,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:33,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:39:33,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:33,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037137251] [2021-06-06 00:39:33,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037137251] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:33,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:33,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-06 00:39:33,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021806570] [2021-06-06 00:39:33,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-06 00:39:33,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:33,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-06 00:39:33,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-06 00:39:33,623 INFO L87 Difference]: Start difference. First operand 1380 states and 5501 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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) [2021-06-06 00:39:33,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:33,649 INFO L93 Difference]: Finished difference Result 1413 states and 5603 transitions. [2021-06-06 00:39:33,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-06 00:39:33,650 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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 23 [2021-06-06 00:39:33,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:33,653 INFO L225 Difference]: With dead ends: 1413 [2021-06-06 00:39:33,653 INFO L226 Difference]: Without dead ends: 1413 [2021-06-06 00:39:33,653 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-06 00:39:33,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2021-06-06 00:39:33,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1394. [2021-06-06 00:39:33,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1393 states have (on average 3.974156496769562) internal successors, (5536), 1393 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:33,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 5536 transitions. [2021-06-06 00:39:33,703 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 5536 transitions. Word has length 23 [2021-06-06 00:39:33,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:33,703 INFO L482 AbstractCegarLoop]: Abstraction has 1394 states and 5536 transitions. [2021-06-06 00:39:33,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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) [2021-06-06 00:39:33,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 5536 transitions. [2021-06-06 00:39:33,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:39:33,707 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:33,707 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:33,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-06 00:39:33,708 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:33,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:33,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1753811376, now seen corresponding path program 4 times [2021-06-06 00:39:33,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:33,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406431685] [2021-06-06 00:39:33,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:33,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:33,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:39:33,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:33,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406431685] [2021-06-06 00:39:33,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406431685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:33,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440042865] [2021-06-06 00:39:33,747 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 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 [2021-06-06 00:39:33,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:39:33,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:33,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:39:33,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:33,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:39:33,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440042865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:33,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:33,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-06 00:39:33,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872658945] [2021-06-06 00:39:33,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-06 00:39:33,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:33,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-06 00:39:33,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:39:33,811 INFO L87 Difference]: Start difference. First operand 1394 states and 5536 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-06-06 00:39:33,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:33,855 INFO L93 Difference]: Finished difference Result 2930 states and 11376 transitions. [2021-06-06 00:39:33,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-06 00:39:33,855 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-06-06 00:39:33,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:33,862 INFO L225 Difference]: With dead ends: 2930 [2021-06-06 00:39:33,862 INFO L226 Difference]: Without dead ends: 2887 [2021-06-06 00:39:33,862 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:39:33,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2021-06-06 00:39:33,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 1526. [2021-06-06 00:39:33,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 4.028196721311476) internal successors, (6143), 1525 states have internal predecessors, (6143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:33,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 6143 transitions. [2021-06-06 00:39:33,894 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 6143 transitions. Word has length 23 [2021-06-06 00:39:33,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:33,895 INFO L482 AbstractCegarLoop]: Abstraction has 1526 states and 6143 transitions. [2021-06-06 00:39:33,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-06-06 00:39:33,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 6143 transitions. [2021-06-06 00:39:33,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:39:33,898 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:33,898 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:34,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:34,117 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:34,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:34,117 INFO L82 PathProgramCache]: Analyzing trace with hash -781102980, now seen corresponding path program 5 times [2021-06-06 00:39:34,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:34,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175746595] [2021-06-06 00:39:34,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:34,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:34,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:39:34,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:34,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175746595] [2021-06-06 00:39:34,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175746595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:34,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974409072] [2021-06-06 00:39:34,145 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 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 [2021-06-06 00:39:34,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:39:34,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:34,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:39:34,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:39:34,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974409072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:34,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:34,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-06 00:39:34,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251803670] [2021-06-06 00:39:34,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-06 00:39:34,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:34,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-06 00:39:34,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:39:34,231 INFO L87 Difference]: Start difference. First operand 1526 states and 6143 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-06-06 00:39:34,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:34,284 INFO L93 Difference]: Finished difference Result 2434 states and 9626 transitions. [2021-06-06 00:39:34,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-06 00:39:34,284 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-06-06 00:39:34,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:34,290 INFO L225 Difference]: With dead ends: 2434 [2021-06-06 00:39:34,290 INFO L226 Difference]: Without dead ends: 2391 [2021-06-06 00:39:34,290 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:39:34,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-06-06 00:39:34,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1578. [2021-06-06 00:39:34,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1577 states have (on average 4.062777425491439) internal successors, (6407), 1577 states have internal predecessors, (6407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:34,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 6407 transitions. [2021-06-06 00:39:34,318 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 6407 transitions. Word has length 23 [2021-06-06 00:39:34,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:34,318 INFO L482 AbstractCegarLoop]: Abstraction has 1578 states and 6407 transitions. [2021-06-06 00:39:34,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-06-06 00:39:34,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 6407 transitions. [2021-06-06 00:39:34,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:39:34,322 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:34,322 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:34,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-06 00:39:34,533 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:34,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:34,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1742267756, now seen corresponding path program 6 times [2021-06-06 00:39:34,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:34,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047428812] [2021-06-06 00:39:34,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:34,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:34,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:39:34,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:34,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047428812] [2021-06-06 00:39:34,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047428812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:34,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152115946] [2021-06-06 00:39:34,560 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 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 [2021-06-06 00:39:34,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-06 00:39:34,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:34,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:39:34,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:34,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:34,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152115946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:34,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:34,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-06 00:39:34,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567594851] [2021-06-06 00:39:34,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:39:34,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:34,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:39:34,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:39:34,679 INFO L87 Difference]: Start difference. First operand 1578 states and 6407 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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) [2021-06-06 00:39:34,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:34,772 INFO L93 Difference]: Finished difference Result 2600 states and 10380 transitions. [2021-06-06 00:39:34,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:39:34,772 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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 23 [2021-06-06 00:39:34,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:34,779 INFO L225 Difference]: With dead ends: 2600 [2021-06-06 00:39:34,779 INFO L226 Difference]: Without dead ends: 2557 [2021-06-06 00:39:34,779 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:39:34,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2021-06-06 00:39:34,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 1678. [2021-06-06 00:39:34,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 4.128205128205129) internal successors, (6923), 1677 states have internal predecessors, (6923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:34,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6923 transitions. [2021-06-06 00:39:34,811 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6923 transitions. Word has length 23 [2021-06-06 00:39:34,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:34,811 INFO L482 AbstractCegarLoop]: Abstraction has 1678 states and 6923 transitions. [2021-06-06 00:39:34,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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) [2021-06-06 00:39:34,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6923 transitions. [2021-06-06 00:39:34,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:39:34,816 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:34,816 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:35,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-06 00:39:35,029 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:35,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:35,029 INFO L82 PathProgramCache]: Analyzing trace with hash -413926864, now seen corresponding path program 2 times [2021-06-06 00:39:35,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:35,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075238750] [2021-06-06 00:39:35,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:35,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:35,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:35,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075238750] [2021-06-06 00:39:35,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075238750] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:35,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:35,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-06 00:39:35,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833761324] [2021-06-06 00:39:35,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:39:35,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:35,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:39:35,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:39:35,052 INFO L87 Difference]: Start difference. First operand 1678 states and 6923 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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) [2021-06-06 00:39:35,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:35,093 INFO L93 Difference]: Finished difference Result 1899 states and 7725 transitions. [2021-06-06 00:39:35,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-06 00:39:35,093 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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 23 [2021-06-06 00:39:35,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:35,098 INFO L225 Difference]: With dead ends: 1899 [2021-06-06 00:39:35,098 INFO L226 Difference]: Without dead ends: 1866 [2021-06-06 00:39:35,098 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:39:35,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-06-06 00:39:35,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1777. [2021-06-06 00:39:35,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1777 states, 1776 states have (on average 4.108671171171171) internal successors, (7297), 1776 states have internal predecessors, (7297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:35,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 7297 transitions. [2021-06-06 00:39:35,154 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 7297 transitions. Word has length 23 [2021-06-06 00:39:35,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:35,155 INFO L482 AbstractCegarLoop]: Abstraction has 1777 states and 7297 transitions. [2021-06-06 00:39:35,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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) [2021-06-06 00:39:35,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 7297 transitions. [2021-06-06 00:39:35,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:39:35,158 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:35,158 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:35,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-06 00:39:35,158 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:35,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:35,158 INFO L82 PathProgramCache]: Analyzing trace with hash 97493908, now seen corresponding path program 2 times [2021-06-06 00:39:35,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:35,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848704147] [2021-06-06 00:39:35,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:35,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:35,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:35,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:35,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848704147] [2021-06-06 00:39:35,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848704147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:35,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831228724] [2021-06-06 00:39:35,175 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 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 [2021-06-06 00:39:35,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:39:35,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:35,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-06 00:39:35,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:35,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831228724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:35,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:35,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-06 00:39:35,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461738780] [2021-06-06 00:39:35,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:39:35,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:35,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:39:35,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:39:35,250 INFO L87 Difference]: Start difference. First operand 1777 states and 7297 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:35,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:35,391 INFO L93 Difference]: Finished difference Result 3584 states and 13842 transitions. [2021-06-06 00:39:35,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:39:35,391 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-06 00:39:35,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:35,399 INFO L225 Difference]: With dead ends: 3584 [2021-06-06 00:39:35,399 INFO L226 Difference]: Without dead ends: 3584 [2021-06-06 00:39:35,400 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:39:35,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3584 states. [2021-06-06 00:39:35,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3584 to 2158. [2021-06-06 00:39:35,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2158 states, 2157 states have (on average 4.179879462216041) internal successors, (9016), 2157 states have internal predecessors, (9016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:35,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2158 states to 2158 states and 9016 transitions. [2021-06-06 00:39:35,441 INFO L78 Accepts]: Start accepts. Automaton has 2158 states and 9016 transitions. Word has length 23 [2021-06-06 00:39:35,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:35,441 INFO L482 AbstractCegarLoop]: Abstraction has 2158 states and 9016 transitions. [2021-06-06 00:39:35,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:35,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2158 states and 9016 transitions. [2021-06-06 00:39:35,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:39:35,445 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:35,445 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:35,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-06 00:39:35,663 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:35,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:35,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1352231348, now seen corresponding path program 3 times [2021-06-06 00:39:35,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:35,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371470367] [2021-06-06 00:39:35,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:35,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:35,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:35,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371470367] [2021-06-06 00:39:35,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371470367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:35,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738142043] [2021-06-06 00:39:35,680 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 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 [2021-06-06 00:39:35,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:39:35,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:35,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-06 00:39:35,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:35,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:35,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738142043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:35,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:35,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-06 00:39:35,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168906440] [2021-06-06 00:39:35,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:39:35,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:35,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:39:35,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:39:35,746 INFO L87 Difference]: Start difference. First operand 2158 states and 9016 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:35,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:35,955 INFO L93 Difference]: Finished difference Result 4126 states and 16268 transitions. [2021-06-06 00:39:35,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:39:35,956 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-06 00:39:35,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:35,964 INFO L225 Difference]: With dead ends: 4126 [2021-06-06 00:39:35,964 INFO L226 Difference]: Without dead ends: 4126 [2021-06-06 00:39:35,965 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:39:35,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-06 00:39:36,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 2337. [2021-06-06 00:39:36,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 2336 states have (on average 4.2555650684931505) internal successors, (9941), 2336 states have internal predecessors, (9941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:36,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 9941 transitions. [2021-06-06 00:39:36,018 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 9941 transitions. Word has length 23 [2021-06-06 00:39:36,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:36,018 INFO L482 AbstractCegarLoop]: Abstraction has 2337 states and 9941 transitions. [2021-06-06 00:39:36,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:36,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 9941 transitions. [2021-06-06 00:39:36,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:39:36,023 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:36,023 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:36,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:36,233 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:36,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:36,233 INFO L82 PathProgramCache]: Analyzing trace with hash -424342964, now seen corresponding path program 4 times [2021-06-06 00:39:36,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:36,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333221596] [2021-06-06 00:39:36,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:36,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:39:36,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:36,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333221596] [2021-06-06 00:39:36,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333221596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:36,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765084815] [2021-06-06 00:39:36,268 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 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 [2021-06-06 00:39:36,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:39:36,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:36,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:39:36,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:36,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:39:36,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765084815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:36,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:36,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-06 00:39:36,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968109522] [2021-06-06 00:39:36,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-06 00:39:36,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:36,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-06 00:39:36,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:39:36,333 INFO L87 Difference]: Start difference. First operand 2337 states and 9941 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-06-06 00:39:36,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:36,398 INFO L93 Difference]: Finished difference Result 2707 states and 11337 transitions. [2021-06-06 00:39:36,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-06 00:39:36,398 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-06-06 00:39:36,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:36,403 INFO L225 Difference]: With dead ends: 2707 [2021-06-06 00:39:36,403 INFO L226 Difference]: Without dead ends: 2643 [2021-06-06 00:39:36,403 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:39:36,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2021-06-06 00:39:36,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 2343. [2021-06-06 00:39:36,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 4.259180187873612) internal successors, (9975), 2342 states have internal predecessors, (9975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:36,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 9975 transitions. [2021-06-06 00:39:36,440 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 9975 transitions. Word has length 23 [2021-06-06 00:39:36,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:36,441 INFO L482 AbstractCegarLoop]: Abstraction has 2343 states and 9975 transitions. [2021-06-06 00:39:36,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-06-06 00:39:36,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 9975 transitions. [2021-06-06 00:39:36,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:39:36,445 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:36,445 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:36,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:36,649 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:36,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:36,649 INFO L82 PathProgramCache]: Analyzing trace with hash 63873728, now seen corresponding path program 5 times [2021-06-06 00:39:36,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:36,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742477273] [2021-06-06 00:39:36,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:36,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:36,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:39:36,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:36,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742477273] [2021-06-06 00:39:36,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742477273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:36,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188940287] [2021-06-06 00:39:36,681 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 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 [2021-06-06 00:39:36,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:39:36,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:36,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:39:36,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:36,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:39:36,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188940287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:36,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:36,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-06 00:39:36,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343139799] [2021-06-06 00:39:36,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-06 00:39:36,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:36,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-06 00:39:36,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:39:36,755 INFO L87 Difference]: Start difference. First operand 2343 states and 9975 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-06-06 00:39:36,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:36,838 INFO L93 Difference]: Finished difference Result 2722 states and 11385 transitions. [2021-06-06 00:39:36,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-06 00:39:36,839 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-06-06 00:39:36,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:36,844 INFO L225 Difference]: With dead ends: 2722 [2021-06-06 00:39:36,844 INFO L226 Difference]: Without dead ends: 2658 [2021-06-06 00:39:36,844 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:39:36,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2658 states. [2021-06-06 00:39:36,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2658 to 2347. [2021-06-06 00:39:36,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 4.2621483375959075) internal successors, (9999), 2346 states have internal predecessors, (9999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:36,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 9999 transitions. [2021-06-06 00:39:36,882 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 9999 transitions. Word has length 23 [2021-06-06 00:39:36,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:36,883 INFO L482 AbstractCegarLoop]: Abstraction has 2347 states and 9999 transitions. [2021-06-06 00:39:36,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-06-06 00:39:36,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 9999 transitions. [2021-06-06 00:39:36,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:39:36,887 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:36,887 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:37,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:37,103 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:37,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:37,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1522443284, now seen corresponding path program 6 times [2021-06-06 00:39:37,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:37,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281938215] [2021-06-06 00:39:37,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:37,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:39:37,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:37,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281938215] [2021-06-06 00:39:37,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281938215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:37,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828471658] [2021-06-06 00:39:37,164 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 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 [2021-06-06 00:39:37,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:39:37,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:37,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:39:37,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:39:37,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828471658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:37,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:37,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-06 00:39:37,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961306950] [2021-06-06 00:39:37,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-06 00:39:37,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:37,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-06 00:39:37,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:39:37,223 INFO L87 Difference]: Start difference. First operand 2347 states and 9999 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-06-06 00:39:37,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:37,299 INFO L93 Difference]: Finished difference Result 3086 states and 12754 transitions. [2021-06-06 00:39:37,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-06 00:39:37,299 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-06-06 00:39:37,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:37,305 INFO L225 Difference]: With dead ends: 3086 [2021-06-06 00:39:37,305 INFO L226 Difference]: Without dead ends: 3022 [2021-06-06 00:39:37,305 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:39:37,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2021-06-06 00:39:37,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 2368. [2021-06-06 00:39:37,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 4.27291930713984) internal successors, (10114), 2367 states have internal predecessors, (10114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:37,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 10114 transitions. [2021-06-06 00:39:37,344 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 10114 transitions. Word has length 23 [2021-06-06 00:39:37,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:37,345 INFO L482 AbstractCegarLoop]: Abstraction has 2368 states and 10114 transitions. [2021-06-06 00:39:37,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-06-06 00:39:37,345 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 10114 transitions. [2021-06-06 00:39:37,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:39:37,349 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:37,349 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:37,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-06 00:39:37,565 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:37,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:37,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1523854228, now seen corresponding path program 3 times [2021-06-06 00:39:37,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:37,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813798605] [2021-06-06 00:39:37,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:37,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:39:37,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:37,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813798605] [2021-06-06 00:39:37,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813798605] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:37,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:37,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-06 00:39:37,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264889041] [2021-06-06 00:39:37,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:39:37,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:37,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:39:37,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:39:37,586 INFO L87 Difference]: Start difference. First operand 2368 states and 10114 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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) [2021-06-06 00:39:37,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:37,630 INFO L93 Difference]: Finished difference Result 2525 states and 10725 transitions. [2021-06-06 00:39:37,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-06 00:39:37,630 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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 23 [2021-06-06 00:39:37,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:37,635 INFO L225 Difference]: With dead ends: 2525 [2021-06-06 00:39:37,635 INFO L226 Difference]: Without dead ends: 2525 [2021-06-06 00:39:37,636 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:39:37,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2525 states. [2021-06-06 00:39:37,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2525 to 2414. [2021-06-06 00:39:37,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2413 states have (on average 4.261500207210941) internal successors, (10283), 2413 states have internal predecessors, (10283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:37,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 10283 transitions. [2021-06-06 00:39:37,675 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 10283 transitions. Word has length 23 [2021-06-06 00:39:37,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:37,675 INFO L482 AbstractCegarLoop]: Abstraction has 2414 states and 10283 transitions. [2021-06-06 00:39:37,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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) [2021-06-06 00:39:37,675 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 10283 transitions. [2021-06-06 00:39:37,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:39:37,680 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:37,681 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:37,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-06 00:39:37,681 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:37,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:37,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1093628820, now seen corresponding path program 4 times [2021-06-06 00:39:37,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:37,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357867991] [2021-06-06 00:39:37,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:37,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:37,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:37,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357867991] [2021-06-06 00:39:37,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357867991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:37,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091180002] [2021-06-06 00:39:37,744 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 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 [2021-06-06 00:39:37,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:39:37,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:37,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-06 00:39:37,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:37,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:37,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091180002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:37,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:37,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-06-06 00:39:37,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849756998] [2021-06-06 00:39:37,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-06 00:39:37,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:37,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-06 00:39:37,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:39:37,812 INFO L87 Difference]: Start difference. First operand 2414 states and 10283 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:37,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:37,916 INFO L93 Difference]: Finished difference Result 3537 states and 14681 transitions. [2021-06-06 00:39:37,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:39:37,917 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-06 00:39:37,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:37,924 INFO L225 Difference]: With dead ends: 3537 [2021-06-06 00:39:37,924 INFO L226 Difference]: Without dead ends: 3537 [2021-06-06 00:39:37,924 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:39:37,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2021-06-06 00:39:37,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 2731. [2021-06-06 00:39:37,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2731 states, 2730 states have (on average 4.247252747252747) internal successors, (11595), 2730 states have internal predecessors, (11595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:37,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2731 states to 2731 states and 11595 transitions. [2021-06-06 00:39:37,978 INFO L78 Accepts]: Start accepts. Automaton has 2731 states and 11595 transitions. Word has length 23 [2021-06-06 00:39:37,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:37,978 INFO L482 AbstractCegarLoop]: Abstraction has 2731 states and 11595 transitions. [2021-06-06 00:39:37,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:37,979 INFO L276 IsEmpty]: Start isEmpty. Operand 2731 states and 11595 transitions. [2021-06-06 00:39:37,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:39:37,984 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:37,984 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:38,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-06 00:39:38,192 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:38,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:38,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1241815956, now seen corresponding path program 5 times [2021-06-06 00:39:38,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:38,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485178169] [2021-06-06 00:39:38,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:38,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:38,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:38,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485178169] [2021-06-06 00:39:38,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485178169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:38,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354612115] [2021-06-06 00:39:38,209 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 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 [2021-06-06 00:39:38,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:39:38,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:38,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-06 00:39:38,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:38,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354612115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:38,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:38,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-06 00:39:38,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963627829] [2021-06-06 00:39:38,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:39:38,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:38,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:39:38,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:39:38,301 INFO L87 Difference]: Start difference. First operand 2731 states and 11595 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) [2021-06-06 00:39:38,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:38,431 INFO L93 Difference]: Finished difference Result 5435 states and 21973 transitions. [2021-06-06 00:39:38,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:39:38,431 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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 23 [2021-06-06 00:39:38,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:38,441 INFO L225 Difference]: With dead ends: 5435 [2021-06-06 00:39:38,441 INFO L226 Difference]: Without dead ends: 5435 [2021-06-06 00:39:38,442 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:39:38,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5435 states. [2021-06-06 00:39:38,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5435 to 3753. [2021-06-06 00:39:38,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3753 states, 3752 states have (on average 4.30863539445629) internal successors, (16166), 3752 states have internal predecessors, (16166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:38,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 16166 transitions. [2021-06-06 00:39:38,512 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 16166 transitions. Word has length 23 [2021-06-06 00:39:38,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:38,512 INFO L482 AbstractCegarLoop]: Abstraction has 3753 states and 16166 transitions. [2021-06-06 00:39:38,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) [2021-06-06 00:39:38,512 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 16166 transitions. [2021-06-06 00:39:38,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:39:38,519 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:38,519 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:38,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-06 00:39:38,733 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:38,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:38,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1311709520, now seen corresponding path program 6 times [2021-06-06 00:39:38,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:38,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699723483] [2021-06-06 00:39:38,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:38,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:38,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:38,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:38,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699723483] [2021-06-06 00:39:38,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699723483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:38,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021923085] [2021-06-06 00:39:38,751 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 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 [2021-06-06 00:39:38,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-06 00:39:38,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:38,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-06 00:39:38,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:38,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021923085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:38,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:38,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-06 00:39:38,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810811538] [2021-06-06 00:39:38,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:39:38,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:38,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:39:38,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:39:38,841 INFO L87 Difference]: Start difference. First operand 3753 states and 16166 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) [2021-06-06 00:39:39,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:39,053 INFO L93 Difference]: Finished difference Result 6635 states and 27289 transitions. [2021-06-06 00:39:39,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:39:39,053 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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 23 [2021-06-06 00:39:39,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:39,067 INFO L225 Difference]: With dead ends: 6635 [2021-06-06 00:39:39,067 INFO L226 Difference]: Without dead ends: 6635 [2021-06-06 00:39:39,067 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:39:39,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6635 states. [2021-06-06 00:39:39,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6635 to 4003. [2021-06-06 00:39:39,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 4.365817091454272) internal successors, (17472), 4002 states have internal predecessors, (17472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:39,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 17472 transitions. [2021-06-06 00:39:39,170 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 17472 transitions. Word has length 23 [2021-06-06 00:39:39,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:39,170 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 17472 transitions. [2021-06-06 00:39:39,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) [2021-06-06 00:39:39,171 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 17472 transitions. [2021-06-06 00:39:39,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:39:39,178 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:39,178 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:39,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-06 00:39:39,393 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:39,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:39,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1126765012, now seen corresponding path program 7 times [2021-06-06 00:39:39,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:39,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74239061] [2021-06-06 00:39:39,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:39,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:39,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:39,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:39,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74239061] [2021-06-06 00:39:39,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74239061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:39,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136029218] [2021-06-06 00:39:39,419 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 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 [2021-06-06 00:39:39,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:39,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:39:39,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:39,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:39,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136029218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:39,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:39,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-06 00:39:39,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824524161] [2021-06-06 00:39:39,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:39:39,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:39,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:39:39,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:39:39,516 INFO L87 Difference]: Start difference. First operand 4003 states and 17472 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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) [2021-06-06 00:39:39,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:39,696 INFO L93 Difference]: Finished difference Result 8080 states and 33388 transitions. [2021-06-06 00:39:39,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:39:39,697 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 25 [2021-06-06 00:39:39,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:39,715 INFO L225 Difference]: With dead ends: 8080 [2021-06-06 00:39:39,715 INFO L226 Difference]: Without dead ends: 7806 [2021-06-06 00:39:39,715 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:39:39,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7806 states. [2021-06-06 00:39:39,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7806 to 5496. [2021-06-06 00:39:39,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5496 states, 5495 states have (on average 4.4049135577798) internal successors, (24205), 5495 states have internal predecessors, (24205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:39,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5496 states to 5496 states and 24205 transitions. [2021-06-06 00:39:39,838 INFO L78 Accepts]: Start accepts. Automaton has 5496 states and 24205 transitions. Word has length 25 [2021-06-06 00:39:39,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:39,838 INFO L482 AbstractCegarLoop]: Abstraction has 5496 states and 24205 transitions. [2021-06-06 00:39:39,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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) [2021-06-06 00:39:39,838 INFO L276 IsEmpty]: Start isEmpty. Operand 5496 states and 24205 transitions. [2021-06-06 00:39:39,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:39:39,849 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:39,849 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:40,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-06 00:39:40,061 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:40,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:40,061 INFO L82 PathProgramCache]: Analyzing trace with hash -838332880, now seen corresponding path program 4 times [2021-06-06 00:39:40,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:40,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400898123] [2021-06-06 00:39:40,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:40,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:40,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:40,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:40,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400898123] [2021-06-06 00:39:40,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400898123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:40,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547252012] [2021-06-06 00:39:40,119 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 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 [2021-06-06 00:39:40,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:39:40,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:40,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:39:40,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:40,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:40,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547252012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:40,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:40,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:39:40,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278631502] [2021-06-06 00:39:40,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:39:40,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:40,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:39:40,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:39:40,206 INFO L87 Difference]: Start difference. First operand 5496 states and 24205 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:39:40,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:40,309 INFO L93 Difference]: Finished difference Result 7686 states and 32613 transitions. [2021-06-06 00:39:40,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:39:40,309 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-06-06 00:39:40,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:40,325 INFO L225 Difference]: With dead ends: 7686 [2021-06-06 00:39:40,325 INFO L226 Difference]: Without dead ends: 7610 [2021-06-06 00:39:40,325 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:39:40,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7610 states. [2021-06-06 00:39:40,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7610 to 5750. [2021-06-06 00:39:40,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5750 states, 5749 states have (on average 4.412071664637328) internal successors, (25365), 5749 states have internal predecessors, (25365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:40,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5750 states to 5750 states and 25365 transitions. [2021-06-06 00:39:40,462 INFO L78 Accepts]: Start accepts. Automaton has 5750 states and 25365 transitions. Word has length 25 [2021-06-06 00:39:40,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:40,462 INFO L482 AbstractCegarLoop]: Abstraction has 5750 states and 25365 transitions. [2021-06-06 00:39:40,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:39:40,462 INFO L276 IsEmpty]: Start isEmpty. Operand 5750 states and 25365 transitions. [2021-06-06 00:39:40,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:39:40,474 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:40,474 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:40,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:40,674 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:40,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:40,675 INFO L82 PathProgramCache]: Analyzing trace with hash 260787888, now seen corresponding path program 1 times [2021-06-06 00:39:40,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:40,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971260505] [2021-06-06 00:39:40,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:40,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:40,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:40,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971260505] [2021-06-06 00:39:40,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971260505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:40,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759315878] [2021-06-06 00:39:40,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-06 00:39:40,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:40,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:39:40,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:40,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:40,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759315878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:40,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:40,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-06 00:39:40,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937006525] [2021-06-06 00:39:40,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:39:40,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:40,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:39:40,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:39:40,795 INFO L87 Difference]: Start difference. First operand 5750 states and 25365 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:41,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:41,150 INFO L93 Difference]: Finished difference Result 13992 states and 58011 transitions. [2021-06-06 00:39:41,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:39:41,160 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:39:41,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:41,196 INFO L225 Difference]: With dead ends: 13992 [2021-06-06 00:39:41,197 INFO L226 Difference]: Without dead ends: 13926 [2021-06-06 00:39:41,197 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 151.0ms TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:39:41,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13926 states. [2021-06-06 00:39:41,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13926 to 7249. [2021-06-06 00:39:41,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7249 states, 7248 states have (on average 4.467301324503311) internal successors, (32379), 7248 states have internal predecessors, (32379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:41,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7249 states to 7249 states and 32379 transitions. [2021-06-06 00:39:41,413 INFO L78 Accepts]: Start accepts. Automaton has 7249 states and 32379 transitions. Word has length 25 [2021-06-06 00:39:41,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:41,413 INFO L482 AbstractCegarLoop]: Abstraction has 7249 states and 32379 transitions. [2021-06-06 00:39:41,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:41,413 INFO L276 IsEmpty]: Start isEmpty. Operand 7249 states and 32379 transitions. [2021-06-06 00:39:41,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:39:41,428 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:41,428 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:41,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-06 00:39:41,633 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:41,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:41,633 INFO L82 PathProgramCache]: Analyzing trace with hash 330681452, now seen corresponding path program 2 times [2021-06-06 00:39:41,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:41,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607031926] [2021-06-06 00:39:41,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:41,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:41,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:41,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:41,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607031926] [2021-06-06 00:39:41,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607031926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:41,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679030256] [2021-06-06 00:39:41,659 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 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 [2021-06-06 00:39:41,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:39:41,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:41,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:39:41,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:41,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:41,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679030256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:41,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:41,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-06 00:39:41,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630005341] [2021-06-06 00:39:41,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:39:41,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:41,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:39:41,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:39:41,767 INFO L87 Difference]: Start difference. First operand 7249 states and 32379 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:42,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:42,181 INFO L93 Difference]: Finished difference Result 12594 states and 53597 transitions. [2021-06-06 00:39:42,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:39:42,182 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:39:42,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:42,209 INFO L225 Difference]: With dead ends: 12594 [2021-06-06 00:39:42,210 INFO L226 Difference]: Without dead ends: 12594 [2021-06-06 00:39:42,210 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 177.3ms TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:39:42,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12594 states. [2021-06-06 00:39:42,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12594 to 8788. [2021-06-06 00:39:42,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8788 states, 8787 states have (on average 4.496073745305565) internal successors, (39507), 8787 states have internal predecessors, (39507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:42,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8788 states to 8788 states and 39507 transitions. [2021-06-06 00:39:42,476 INFO L78 Accepts]: Start accepts. Automaton has 8788 states and 39507 transitions. Word has length 25 [2021-06-06 00:39:42,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:42,476 INFO L482 AbstractCegarLoop]: Abstraction has 8788 states and 39507 transitions. [2021-06-06 00:39:42,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:42,477 INFO L276 IsEmpty]: Start isEmpty. Operand 8788 states and 39507 transitions. [2021-06-06 00:39:42,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:39:42,494 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:42,494 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:42,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:42,694 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:42,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:42,695 INFO L82 PathProgramCache]: Analyzing trace with hash -7958540, now seen corresponding path program 3 times [2021-06-06 00:39:42,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:42,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500582654] [2021-06-06 00:39:42,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:42,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:42,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:42,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:42,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500582654] [2021-06-06 00:39:42,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500582654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:42,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485461047] [2021-06-06 00:39:42,802 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 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 [2021-06-06 00:39:42,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:39:42,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:42,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:39:42,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:42,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:42,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485461047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:42,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:42,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-06 00:39:42,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53460795] [2021-06-06 00:39:42,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:39:42,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:42,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:39:42,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:39:42,943 INFO L87 Difference]: Start difference. First operand 8788 states and 39507 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:43,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:43,604 INFO L93 Difference]: Finished difference Result 29971 states and 129329 transitions. [2021-06-06 00:39:43,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-06 00:39:43,604 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:39:43,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:43,744 INFO L225 Difference]: With dead ends: 29971 [2021-06-06 00:39:43,744 INFO L226 Difference]: Without dead ends: 29848 [2021-06-06 00:39:43,745 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 293.0ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:39:43,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29848 states. [2021-06-06 00:39:44,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29848 to 14478. [2021-06-06 00:39:44,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14478 states, 14477 states have (on average 4.563859915728397) internal successors, (66071), 14477 states have internal predecessors, (66071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:44,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14478 states to 14478 states and 66071 transitions. [2021-06-06 00:39:44,295 INFO L78 Accepts]: Start accepts. Automaton has 14478 states and 66071 transitions. Word has length 25 [2021-06-06 00:39:44,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:44,295 INFO L482 AbstractCegarLoop]: Abstraction has 14478 states and 66071 transitions. [2021-06-06 00:39:44,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:44,296 INFO L276 IsEmpty]: Start isEmpty. Operand 14478 states and 66071 transitions. [2021-06-06 00:39:44,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:39:44,325 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:44,325 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:44,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-06 00:39:44,540 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:44,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:44,541 INFO L82 PathProgramCache]: Analyzing trace with hash 209069450, now seen corresponding path program 4 times [2021-06-06 00:39:44,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:44,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809866761] [2021-06-06 00:39:44,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:44,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:44,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:44,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809866761] [2021-06-06 00:39:44,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809866761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:44,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609021652] [2021-06-06 00:39:44,654 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 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 [2021-06-06 00:39:44,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:39:44,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:44,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:39:44,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:44,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:44,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609021652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:44,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:44,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-06-06 00:39:44,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431468494] [2021-06-06 00:39:44,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:39:44,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:44,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:39:44,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:39:44,754 INFO L87 Difference]: Start difference. First operand 14478 states and 66071 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) 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) [2021-06-06 00:39:45,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:45,266 INFO L93 Difference]: Finished difference Result 31001 states and 134975 transitions. [2021-06-06 00:39:45,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:39:45,266 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) 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 25 [2021-06-06 00:39:45,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:45,351 INFO L225 Difference]: With dead ends: 31001 [2021-06-06 00:39:45,351 INFO L226 Difference]: Without dead ends: 30851 [2021-06-06 00:39:45,352 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 161.3ms TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:39:45,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30851 states. [2021-06-06 00:39:45,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30851 to 21508. [2021-06-06 00:39:45,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21508 states, 21507 states have (on average 4.549309527130702) internal successors, (97842), 21507 states have internal predecessors, (97842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:45,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21508 states to 21508 states and 97842 transitions. [2021-06-06 00:39:45,958 INFO L78 Accepts]: Start accepts. Automaton has 21508 states and 97842 transitions. Word has length 25 [2021-06-06 00:39:45,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:45,958 INFO L482 AbstractCegarLoop]: Abstraction has 21508 states and 97842 transitions. [2021-06-06 00:39:45,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) 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) [2021-06-06 00:39:45,958 INFO L276 IsEmpty]: Start isEmpty. Operand 21508 states and 97842 transitions. [2021-06-06 00:39:46,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:39:46,118 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:46,119 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:46,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:46,319 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:46,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:46,319 INFO L82 PathProgramCache]: Analyzing trace with hash -856581012, now seen corresponding path program 5 times [2021-06-06 00:39:46,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:46,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524876924] [2021-06-06 00:39:46,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:46,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:46,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524876924] [2021-06-06 00:39:46,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524876924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:46,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50551844] [2021-06-06 00:39:46,384 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 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 [2021-06-06 00:39:46,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:39:46,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:46,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-06 00:39:46,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:46,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:46,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50551844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:46,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:46,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:39:46,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489104759] [2021-06-06 00:39:46,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:39:46,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:46,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:39:46,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:39:46,646 INFO L87 Difference]: Start difference. First operand 21508 states and 97842 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:46,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:46,942 INFO L93 Difference]: Finished difference Result 27651 states and 123756 transitions. [2021-06-06 00:39:46,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:39:46,942 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:39:46,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:47,081 INFO L225 Difference]: With dead ends: 27651 [2021-06-06 00:39:47,082 INFO L226 Difference]: Without dead ends: 27523 [2021-06-06 00:39:47,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:39:47,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27523 states. [2021-06-06 00:39:47,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27523 to 21550. [2021-06-06 00:39:47,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21550 states, 21549 states have (on average 4.550559190681702) internal successors, (98060), 21549 states have internal predecessors, (98060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:47,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21550 states to 21550 states and 98060 transitions. [2021-06-06 00:39:47,708 INFO L78 Accepts]: Start accepts. Automaton has 21550 states and 98060 transitions. Word has length 25 [2021-06-06 00:39:47,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:47,718 INFO L482 AbstractCegarLoop]: Abstraction has 21550 states and 98060 transitions. [2021-06-06 00:39:47,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:47,719 INFO L276 IsEmpty]: Start isEmpty. Operand 21550 states and 98060 transitions. [2021-06-06 00:39:47,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:39:47,772 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:47,772 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:47,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-06 00:39:47,972 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:47,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:47,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1236735550, now seen corresponding path program 6 times [2021-06-06 00:39:47,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:47,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281002494] [2021-06-06 00:39:47,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:47,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:48,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:48,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:48,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281002494] [2021-06-06 00:39:48,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281002494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:48,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844646505] [2021-06-06 00:39:48,033 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 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 [2021-06-06 00:39:48,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:39:48,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:48,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-06 00:39:48,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:48,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844646505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:48,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:48,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:39:48,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4775205] [2021-06-06 00:39:48,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:39:48,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:48,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:39:48,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:39:48,132 INFO L87 Difference]: Start difference. First operand 21550 states and 98060 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:48,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:48,476 INFO L93 Difference]: Finished difference Result 22500 states and 101338 transitions. [2021-06-06 00:39:48,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:39:48,477 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:39:48,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:48,539 INFO L225 Difference]: With dead ends: 22500 [2021-06-06 00:39:48,539 INFO L226 Difference]: Without dead ends: 22316 [2021-06-06 00:39:48,539 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:39:48,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22316 states. [2021-06-06 00:39:48,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22316 to 21544. [2021-06-06 00:39:49,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21544 states, 21543 states have (on average 4.5494592210926985) internal successors, (98009), 21543 states have internal predecessors, (98009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:49,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21544 states to 21544 states and 98009 transitions. [2021-06-06 00:39:49,074 INFO L78 Accepts]: Start accepts. Automaton has 21544 states and 98009 transitions. Word has length 25 [2021-06-06 00:39:49,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:49,074 INFO L482 AbstractCegarLoop]: Abstraction has 21544 states and 98009 transitions. [2021-06-06 00:39:49,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:49,074 INFO L276 IsEmpty]: Start isEmpty. Operand 21544 states and 98009 transitions. [2021-06-06 00:39:49,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:39:49,115 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:49,115 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:49,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-06 00:39:49,321 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:49,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:49,321 INFO L82 PathProgramCache]: Analyzing trace with hash -556155216, now seen corresponding path program 7 times [2021-06-06 00:39:49,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:49,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544637833] [2021-06-06 00:39:49,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:49,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:49,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:49,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:49,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544637833] [2021-06-06 00:39:49,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544637833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:49,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748211813] [2021-06-06 00:39:49,358 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 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 [2021-06-06 00:39:49,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:49,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:39:49,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:49,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748211813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:49,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:49,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-06-06 00:39:49,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30977248] [2021-06-06 00:39:49,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:39:49,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:49,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:39:49,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:39:49,456 INFO L87 Difference]: Start difference. First operand 21544 states and 98009 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) 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) [2021-06-06 00:39:50,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:50,191 INFO L93 Difference]: Finished difference Result 37571 states and 165395 transitions. [2021-06-06 00:39:50,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:39:50,191 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) 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 25 [2021-06-06 00:39:50,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:50,311 INFO L225 Difference]: With dead ends: 37571 [2021-06-06 00:39:50,311 INFO L226 Difference]: Without dead ends: 37406 [2021-06-06 00:39:50,312 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 340.6ms TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:39:50,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37406 states. [2021-06-06 00:39:50,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37406 to 25632. [2021-06-06 00:39:50,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25632 states, 25631 states have (on average 4.59131520424486) internal successors, (117680), 25631 states have internal predecessors, (117680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:51,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25632 states to 25632 states and 117680 transitions. [2021-06-06 00:39:51,215 INFO L78 Accepts]: Start accepts. Automaton has 25632 states and 117680 transitions. Word has length 25 [2021-06-06 00:39:51,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:51,215 INFO L482 AbstractCegarLoop]: Abstraction has 25632 states and 117680 transitions. [2021-06-06 00:39:51,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) 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) [2021-06-06 00:39:51,215 INFO L276 IsEmpty]: Start isEmpty. Operand 25632 states and 117680 transitions. [2021-06-06 00:39:51,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:39:51,271 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:51,271 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:51,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-06 00:39:51,471 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:51,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:51,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1592641320, now seen corresponding path program 8 times [2021-06-06 00:39:51,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:51,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406242181] [2021-06-06 00:39:51,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:51,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:51,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:51,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:51,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406242181] [2021-06-06 00:39:51,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406242181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:51,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926827287] [2021-06-06 00:39:51,521 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 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 [2021-06-06 00:39:51,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:39:51,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:51,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-06 00:39:51,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:51,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926827287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:51,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:51,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:39:51,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307779227] [2021-06-06 00:39:51,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:39:51,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:51,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:39:51,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:39:51,616 INFO L87 Difference]: Start difference. First operand 25632 states and 117680 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-06-06 00:39:51,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:51,911 INFO L93 Difference]: Finished difference Result 26558 states and 120874 transitions. [2021-06-06 00:39:51,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:39:51,911 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 25 [2021-06-06 00:39:51,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:51,997 INFO L225 Difference]: With dead ends: 26558 [2021-06-06 00:39:51,998 INFO L226 Difference]: Without dead ends: 26388 [2021-06-06 00:39:51,998 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:39:52,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26388 states. [2021-06-06 00:39:52,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26388 to 25652. [2021-06-06 00:39:52,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25652 states, 25651 states have (on average 4.589294764336673) internal successors, (117720), 25651 states have internal predecessors, (117720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:52,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25652 states to 25652 states and 117720 transitions. [2021-06-06 00:39:52,820 INFO L78 Accepts]: Start accepts. Automaton has 25652 states and 117720 transitions. Word has length 25 [2021-06-06 00:39:52,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:52,821 INFO L482 AbstractCegarLoop]: Abstraction has 25652 states and 117720 transitions. [2021-06-06 00:39:52,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-06-06 00:39:52,821 INFO L276 IsEmpty]: Start isEmpty. Operand 25652 states and 117720 transitions. [2021-06-06 00:39:52,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:39:52,883 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:52,883 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:53,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:53,084 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:53,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:53,084 INFO L82 PathProgramCache]: Analyzing trace with hash 256048560, now seen corresponding path program 1 times [2021-06-06 00:39:53,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:53,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883159833] [2021-06-06 00:39:53,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:53,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:53,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:53,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883159833] [2021-06-06 00:39:53,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883159833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:53,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262632655] [2021-06-06 00:39:53,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-06 00:39:53,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:53,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:39:53,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:53,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262632655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:53,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:53,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-06 00:39:53,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461760321] [2021-06-06 00:39:53,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:39:53,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:53,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:39:53,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:39:53,232 INFO L87 Difference]: Start difference. First operand 25652 states and 117720 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:53,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:53,584 INFO L93 Difference]: Finished difference Result 28634 states and 129447 transitions. [2021-06-06 00:39:53,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-06 00:39:53,585 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:39:53,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:53,671 INFO L225 Difference]: With dead ends: 28634 [2021-06-06 00:39:53,671 INFO L226 Difference]: Without dead ends: 28616 [2021-06-06 00:39:53,671 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:39:53,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28616 states. [2021-06-06 00:39:54,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28616 to 26082. [2021-06-06 00:39:54,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26082 states, 26081 states have (on average 4.586288869291821) internal successors, (119615), 26081 states have internal predecessors, (119615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:54,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26082 states to 26082 states and 119615 transitions. [2021-06-06 00:39:54,341 INFO L78 Accepts]: Start accepts. Automaton has 26082 states and 119615 transitions. Word has length 25 [2021-06-06 00:39:54,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:54,341 INFO L482 AbstractCegarLoop]: Abstraction has 26082 states and 119615 transitions. [2021-06-06 00:39:54,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:54,341 INFO L276 IsEmpty]: Start isEmpty. Operand 26082 states and 119615 transitions. [2021-06-06 00:39:54,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:39:54,395 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:54,395 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:54,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-06 00:39:54,602 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:54,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:54,602 INFO L82 PathProgramCache]: Analyzing trace with hash 706782640, now seen corresponding path program 2 times [2021-06-06 00:39:54,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:54,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088146699] [2021-06-06 00:39:54,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:54,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:54,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:54,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:54,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088146699] [2021-06-06 00:39:54,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088146699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:54,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072235533] [2021-06-06 00:39:54,665 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 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 [2021-06-06 00:39:54,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:39:54,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:54,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:39:54,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:54,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072235533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:54,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:54,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-06 00:39:54,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406258082] [2021-06-06 00:39:54,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:39:54,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:54,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:39:54,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:39:54,768 INFO L87 Difference]: Start difference. First operand 26082 states and 119615 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:55,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:55,045 INFO L93 Difference]: Finished difference Result 30645 states and 137873 transitions. [2021-06-06 00:39:55,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:39:55,046 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:39:55,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:55,347 INFO L225 Difference]: With dead ends: 30645 [2021-06-06 00:39:55,347 INFO L226 Difference]: Without dead ends: 30645 [2021-06-06 00:39:55,347 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:39:55,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30645 states. [2021-06-06 00:39:55,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30645 to 25908. [2021-06-06 00:39:55,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25908 states, 25907 states have (on average 4.584243640714865) internal successors, (118764), 25907 states have internal predecessors, (118764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:55,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25908 states to 25908 states and 118764 transitions. [2021-06-06 00:39:55,854 INFO L78 Accepts]: Start accepts. Automaton has 25908 states and 118764 transitions. Word has length 25 [2021-06-06 00:39:55,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:55,854 INFO L482 AbstractCegarLoop]: Abstraction has 25908 states and 118764 transitions. [2021-06-06 00:39:55,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:55,854 INFO L276 IsEmpty]: Start isEmpty. Operand 25908 states and 118764 transitions. [2021-06-06 00:39:56,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:39:56,079 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:56,079 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:56,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-06 00:39:56,293 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:56,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:56,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1083621228, now seen corresponding path program 3 times [2021-06-06 00:39:56,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:56,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184885092] [2021-06-06 00:39:56,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:56,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:56,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:56,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184885092] [2021-06-06 00:39:56,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184885092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:56,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407034678] [2021-06-06 00:39:56,329 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 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 [2021-06-06 00:39:56,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:39:56,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:56,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:39:56,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:56,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:56,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407034678] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:56,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-06 00:39:56,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-06-06 00:39:56,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884262672] [2021-06-06 00:39:56,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-06 00:39:56,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:56,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-06 00:39:56,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:39:56,416 INFO L87 Difference]: Start difference. First operand 25908 states and 118764 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2021-06-06 00:39:56,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:56,720 INFO L93 Difference]: Finished difference Result 33932 states and 151310 transitions. [2021-06-06 00:39:56,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:39:56,723 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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 25 [2021-06-06 00:39:56,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:56,816 INFO L225 Difference]: With dead ends: 33932 [2021-06-06 00:39:56,817 INFO L226 Difference]: Without dead ends: 33850 [2021-06-06 00:39:56,817 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:39:56,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33850 states. [2021-06-06 00:39:57,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33850 to 27223. [2021-06-06 00:39:57,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27223 states, 27222 states have (on average 4.581074131217398) internal successors, (124706), 27222 states have internal predecessors, (124706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:57,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27223 states to 27223 states and 124706 transitions. [2021-06-06 00:39:57,622 INFO L78 Accepts]: Start accepts. Automaton has 27223 states and 124706 transitions. Word has length 25 [2021-06-06 00:39:57,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:57,622 INFO L482 AbstractCegarLoop]: Abstraction has 27223 states and 124706 transitions. [2021-06-06 00:39:57,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2021-06-06 00:39:57,622 INFO L276 IsEmpty]: Start isEmpty. Operand 27223 states and 124706 transitions. [2021-06-06 00:39:57,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:39:57,688 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:57,688 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:57,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:57,888 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:57,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:57,889 INFO L82 PathProgramCache]: Analyzing trace with hash 137417170, now seen corresponding path program 5 times [2021-06-06 00:39:57,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:57,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363647573] [2021-06-06 00:39:57,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:57,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:57,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:57,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363647573] [2021-06-06 00:39:57,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363647573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:57,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800944653] [2021-06-06 00:39:57,950 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 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 [2021-06-06 00:39:57,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:39:57,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:57,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:39:57,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:58,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:58,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800944653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:58,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:58,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:39:58,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175816424] [2021-06-06 00:39:58,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:39:58,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:58,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:39:58,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:39:58,027 INFO L87 Difference]: Start difference. First operand 27223 states and 124706 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:39:58,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:58,312 INFO L93 Difference]: Finished difference Result 29638 states and 134233 transitions. [2021-06-06 00:39:58,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:39:58,313 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-06-06 00:39:58,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:58,424 INFO L225 Difference]: With dead ends: 29638 [2021-06-06 00:39:58,424 INFO L226 Difference]: Without dead ends: 29562 [2021-06-06 00:39:58,424 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:39:58,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29562 states. [2021-06-06 00:39:59,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29562 to 27293. [2021-06-06 00:39:59,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27293 states, 27292 states have (on average 4.584017294445259) internal successors, (125107), 27292 states have internal predecessors, (125107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:59,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27293 states to 27293 states and 125107 transitions. [2021-06-06 00:39:59,189 INFO L78 Accepts]: Start accepts. Automaton has 27293 states and 125107 transitions. Word has length 25 [2021-06-06 00:39:59,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:59,189 INFO L482 AbstractCegarLoop]: Abstraction has 27293 states and 125107 transitions. [2021-06-06 00:39:59,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:39:59,189 INFO L276 IsEmpty]: Start isEmpty. Operand 27293 states and 125107 transitions. [2021-06-06 00:39:59,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:39:59,248 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:59,248 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:59,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-06 00:39:59,448 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:59,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:59,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1704182322, now seen corresponding path program 6 times [2021-06-06 00:39:59,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:59,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265776376] [2021-06-06 00:39:59,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:59,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:59,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:59,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265776376] [2021-06-06 00:39:59,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265776376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:59,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540221426] [2021-06-06 00:39:59,502 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 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 [2021-06-06 00:39:59,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-06 00:39:59,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:59,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:39:59,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:59,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:59,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540221426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:59,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:59,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:39:59,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764042737] [2021-06-06 00:39:59,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:39:59,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:59,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:39:59,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:39:59,581 INFO L87 Difference]: Start difference. First operand 27293 states and 125107 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:40:00,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:40:00,025 INFO L93 Difference]: Finished difference Result 29552 states and 134049 transitions. [2021-06-06 00:40:00,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:40:00,026 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-06-06 00:40:00,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:40:00,106 INFO L225 Difference]: With dead ends: 29552 [2021-06-06 00:40:00,107 INFO L226 Difference]: Without dead ends: 29476 [2021-06-06 00:40:00,107 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:40:00,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29476 states. [2021-06-06 00:40:00,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29476 to 27436. [2021-06-06 00:40:00,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27436 states, 27435 states have (on average 4.586477127756515) internal successors, (125830), 27435 states have internal predecessors, (125830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:00,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27436 states to 27436 states and 125830 transitions. [2021-06-06 00:40:00,873 INFO L78 Accepts]: Start accepts. Automaton has 27436 states and 125830 transitions. Word has length 25 [2021-06-06 00:40:00,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:40:00,873 INFO L482 AbstractCegarLoop]: Abstraction has 27436 states and 125830 transitions. [2021-06-06 00:40:00,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:40:00,874 INFO L276 IsEmpty]: Start isEmpty. Operand 27436 states and 125830 transitions. [2021-06-06 00:40:00,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:40:00,932 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:40:00,932 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:40:01,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:40:01,133 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:40:01,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:40:01,133 INFO L82 PathProgramCache]: Analyzing trace with hash -605061554, now seen corresponding path program 9 times [2021-06-06 00:40:01,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:40:01,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924153661] [2021-06-06 00:40:01,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:40:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:40:01,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:01,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:40:01,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924153661] [2021-06-06 00:40:01,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924153661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:01,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587091516] [2021-06-06 00:40:01,160 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 [2021-06-06 00:40:01,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:40:01,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:40:01,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:40:01,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:40:01,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:01,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587091516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:01,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:40:01,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-06 00:40:01,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791044778] [2021-06-06 00:40:01,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:40:01,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:40:01,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:40:01,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:40:01,250 INFO L87 Difference]: Start difference. First operand 27436 states and 125830 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:01,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:40:01,771 INFO L93 Difference]: Finished difference Result 58244 states and 263402 transitions. [2021-06-06 00:40:01,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:40:01,771 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:40:01,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:40:01,968 INFO L225 Difference]: With dead ends: 58244 [2021-06-06 00:40:01,968 INFO L226 Difference]: Without dead ends: 58083 [2021-06-06 00:40:01,969 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:40:02,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58083 states. [2021-06-06 00:40:03,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58083 to 50808. [2021-06-06 00:40:03,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50808 states, 50807 states have (on average 4.5649615210502485) internal successors, (231932), 50807 states have internal predecessors, (231932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:03,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50808 states to 50808 states and 231932 transitions. [2021-06-06 00:40:03,737 INFO L78 Accepts]: Start accepts. Automaton has 50808 states and 231932 transitions. Word has length 25 [2021-06-06 00:40:03,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:40:03,737 INFO L482 AbstractCegarLoop]: Abstraction has 50808 states and 231932 transitions. [2021-06-06 00:40:03,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:03,737 INFO L276 IsEmpty]: Start isEmpty. Operand 50808 states and 231932 transitions. [2021-06-06 00:40:03,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:40:03,846 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:40:03,846 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:40:04,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-06 00:40:04,047 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:40:04,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:40:04,047 INFO L82 PathProgramCache]: Analyzing trace with hash -535167990, now seen corresponding path program 10 times [2021-06-06 00:40:04,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:40:04,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134466093] [2021-06-06 00:40:04,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:40:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:40:04,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:04,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:40:04,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134466093] [2021-06-06 00:40:04,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134466093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:04,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681989123] [2021-06-06 00:40:04,071 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 [2021-06-06 00:40:04,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:40:04,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:40:04,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:40:04,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:40:04,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:04,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681989123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:04,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:40:04,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-06 00:40:04,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956063356] [2021-06-06 00:40:04,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:40:04,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:40:04,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:40:04,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:40:04,160 INFO L87 Difference]: Start difference. First operand 50808 states and 231932 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:05,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:40:05,232 INFO L93 Difference]: Finished difference Result 83779 states and 378490 transitions. [2021-06-06 00:40:05,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:40:05,232 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:40:05,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:40:05,547 INFO L225 Difference]: With dead ends: 83779 [2021-06-06 00:40:05,548 INFO L226 Difference]: Without dead ends: 83779 [2021-06-06 00:40:05,548 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 142.9ms TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:40:05,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83779 states. [2021-06-06 00:40:07,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83779 to 72653. [2021-06-06 00:40:07,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72653 states, 72652 states have (on average 4.592110334195893) internal successors, (333626), 72652 states have internal predecessors, (333626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:07,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72653 states to 72653 states and 333626 transitions. [2021-06-06 00:40:07,865 INFO L78 Accepts]: Start accepts. Automaton has 72653 states and 333626 transitions. Word has length 25 [2021-06-06 00:40:07,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:40:07,866 INFO L482 AbstractCegarLoop]: Abstraction has 72653 states and 333626 transitions. [2021-06-06 00:40:07,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:07,866 INFO L276 IsEmpty]: Start isEmpty. Operand 72653 states and 333626 transitions. [2021-06-06 00:40:08,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:40:08,062 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:40:08,062 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:40:08,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-06 00:40:08,278 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:40:08,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:40:08,279 INFO L82 PathProgramCache]: Analyzing trace with hash -2017642098, now seen corresponding path program 7 times [2021-06-06 00:40:08,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:40:08,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074200703] [2021-06-06 00:40:08,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:40:08,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:40:08,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:08,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:40:08,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074200703] [2021-06-06 00:40:08,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074200703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:08,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816857272] [2021-06-06 00:40:08,419 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 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 [2021-06-06 00:40:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:40:08,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:40:08,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:40:08,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:08,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816857272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:08,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:40:08,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:40:08,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299697658] [2021-06-06 00:40:08,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:40:08,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:40:08,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:40:08,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:40:08,489 INFO L87 Difference]: Start difference. First operand 72653 states and 333626 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:40:09,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:40:09,476 INFO L93 Difference]: Finished difference Result 74099 states and 339316 transitions. [2021-06-06 00:40:09,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:40:09,476 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-06-06 00:40:09,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:40:09,725 INFO L225 Difference]: With dead ends: 74099 [2021-06-06 00:40:09,725 INFO L226 Difference]: Without dead ends: 74023 [2021-06-06 00:40:09,725 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:40:09,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74023 states. [2021-06-06 00:40:11,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74023 to 72711. [2021-06-06 00:40:11,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72711 states, 72710 states have (on average 4.592366937147572) internal successors, (333911), 72710 states have internal predecessors, (333911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:11,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72711 states to 72711 states and 333911 transitions. [2021-06-06 00:40:11,872 INFO L78 Accepts]: Start accepts. Automaton has 72711 states and 333911 transitions. Word has length 25 [2021-06-06 00:40:11,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:40:11,872 INFO L482 AbstractCegarLoop]: Abstraction has 72711 states and 333911 transitions. [2021-06-06 00:40:11,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:40:11,873 INFO L276 IsEmpty]: Start isEmpty. Operand 72711 states and 333911 transitions. [2021-06-06 00:40:12,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:40:12,093 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:40:12,093 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:40:12,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-06 00:40:12,293 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:40:12,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:40:12,294 INFO L82 PathProgramCache]: Analyzing trace with hash -660900726, now seen corresponding path program 8 times [2021-06-06 00:40:12,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:40:12,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012489465] [2021-06-06 00:40:12,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:40:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:40:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:40:12,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:40:12,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012489465] [2021-06-06 00:40:12,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012489465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:12,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990777105] [2021-06-06 00:40:12,370 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 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 [2021-06-06 00:40:12,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:40:12,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:40:12,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:40:12,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:40:12,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:40:12,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990777105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:12,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:40:12,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:40:12,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057847142] [2021-06-06 00:40:12,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:40:12,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:40:12,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:40:12,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:40:12,437 INFO L87 Difference]: Start difference. First operand 72711 states and 333911 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:40:12,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:40:12,973 INFO L93 Difference]: Finished difference Result 73874 states and 338535 transitions. [2021-06-06 00:40:12,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:40:12,973 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-06-06 00:40:12,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:40:13,236 INFO L225 Difference]: With dead ends: 73874 [2021-06-06 00:40:13,236 INFO L226 Difference]: Without dead ends: 73798 [2021-06-06 00:40:13,236 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:40:13,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73798 states. [2021-06-06 00:40:15,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73798 to 72769. [2021-06-06 00:40:15,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72769 states, 72768 states have (on average 4.592650615655233) internal successors, (334198), 72768 states have internal predecessors, (334198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:15,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72769 states to 72769 states and 334198 transitions. [2021-06-06 00:40:15,587 INFO L78 Accepts]: Start accepts. Automaton has 72769 states and 334198 transitions. Word has length 25 [2021-06-06 00:40:15,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:40:15,587 INFO L482 AbstractCegarLoop]: Abstraction has 72769 states and 334198 transitions. [2021-06-06 00:40:15,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:40:15,588 INFO L276 IsEmpty]: Start isEmpty. Operand 72769 states and 334198 transitions. [2021-06-06 00:40:15,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:40:15,763 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:40:15,763 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:40:15,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-06 00:40:15,977 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:40:15,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:40:15,977 INFO L82 PathProgramCache]: Analyzing trace with hash -2072982634, now seen corresponding path program 11 times [2021-06-06 00:40:15,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:40:15,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496688523] [2021-06-06 00:40:15,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:40:15,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:40:16,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:16,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:40:16,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496688523] [2021-06-06 00:40:16,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496688523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:16,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973299602] [2021-06-06 00:40:16,008 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 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 [2021-06-06 00:40:16,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:40:16,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:40:16,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:40:16,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:40:16,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:16,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973299602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:16,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:40:16,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-06 00:40:16,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354878398] [2021-06-06 00:40:16,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:40:16,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:40:16,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:40:16,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:40:16,093 INFO L87 Difference]: Start difference. First operand 72769 states and 334198 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-06-06 00:40:17,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:40:17,430 INFO L93 Difference]: Finished difference Result 113780 states and 518908 transitions. [2021-06-06 00:40:17,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:40:17,430 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 25 [2021-06-06 00:40:17,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:40:17,884 INFO L225 Difference]: With dead ends: 113780 [2021-06-06 00:40:17,884 INFO L226 Difference]: Without dead ends: 113660 [2021-06-06 00:40:17,885 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 90.1ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:40:18,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113660 states. [2021-06-06 00:40:20,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113660 to 97354. [2021-06-06 00:40:20,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97354 states, 97353 states have (on average 4.601532567049809) internal successors, (447973), 97353 states have internal predecessors, (447973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:21,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97354 states to 97354 states and 447973 transitions. [2021-06-06 00:40:21,307 INFO L78 Accepts]: Start accepts. Automaton has 97354 states and 447973 transitions. Word has length 25 [2021-06-06 00:40:21,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:40:21,308 INFO L482 AbstractCegarLoop]: Abstraction has 97354 states and 447973 transitions. [2021-06-06 00:40:21,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-06-06 00:40:21,308 INFO L276 IsEmpty]: Start isEmpty. Operand 97354 states and 447973 transitions. [2021-06-06 00:40:21,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:40:21,561 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:40:21,561 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:40:21,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:40:21,765 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:40:21,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:40:21,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1816187858, now seen corresponding path program 12 times [2021-06-06 00:40:21,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:40:21,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176985383] [2021-06-06 00:40:21,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:40:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:40:21,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:21,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:40:21,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176985383] [2021-06-06 00:40:21,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176985383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:21,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013056976] [2021-06-06 00:40:21,816 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 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 [2021-06-06 00:40:21,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-06 00:40:21,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:40:21,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:40:21,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:40:21,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:21,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013056976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:21,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:40:21,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-06 00:40:21,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214860497] [2021-06-06 00:40:21,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:40:21,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:40:21,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:40:21,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:40:21,947 INFO L87 Difference]: Start difference. First operand 97354 states and 447973 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-06-06 00:40:23,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:40:23,840 INFO L93 Difference]: Finished difference Result 199161 states and 905866 transitions. [2021-06-06 00:40:23,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:40:23,841 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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 25 [2021-06-06 00:40:23,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:40:24,598 INFO L225 Difference]: With dead ends: 199161 [2021-06-06 00:40:24,598 INFO L226 Difference]: Without dead ends: 199068 [2021-06-06 00:40:24,598 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 156.7ms TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:40:25,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199068 states. [2021-06-06 00:40:28,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199068 to 126471. [2021-06-06 00:40:28,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126471 states, 126470 states have (on average 4.598568830552701) internal successors, (581581), 126470 states have internal predecessors, (581581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:29,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126471 states to 126471 states and 581581 transitions. [2021-06-06 00:40:29,762 INFO L78 Accepts]: Start accepts. Automaton has 126471 states and 581581 transitions. Word has length 25 [2021-06-06 00:40:29,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:40:29,763 INFO L482 AbstractCegarLoop]: Abstraction has 126471 states and 581581 transitions. [2021-06-06 00:40:29,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-06-06 00:40:29,763 INFO L276 IsEmpty]: Start isEmpty. Operand 126471 states and 581581 transitions. [2021-06-06 00:40:30,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:40:30,033 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:40:30,033 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:40:30,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-06 00:40:30,241 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:40:30,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:40:30,241 INFO L82 PathProgramCache]: Analyzing trace with hash 193179122, now seen corresponding path program 13 times [2021-06-06 00:40:30,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:40:30,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182645803] [2021-06-06 00:40:30,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:40:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:40:30,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:30,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:40:30,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182645803] [2021-06-06 00:40:30,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182645803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:30,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467535303] [2021-06-06 00:40:30,298 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-06 00:40:30,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:40:30,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:40:30,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:40:30,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:30,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467535303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:30,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:40:30,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-06 00:40:30,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324520914] [2021-06-06 00:40:30,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:40:30,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:40:30,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:40:30,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:40:30,423 INFO L87 Difference]: Start difference. First operand 126471 states and 581581 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:32,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:40:32,363 INFO L93 Difference]: Finished difference Result 206475 states and 937233 transitions. [2021-06-06 00:40:32,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:40:32,364 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:40:32,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:40:33,666 INFO L225 Difference]: With dead ends: 206475 [2021-06-06 00:40:33,666 INFO L226 Difference]: Without dead ends: 206475 [2021-06-06 00:40:33,667 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 146.7ms TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:40:33,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206475 states. [2021-06-06 00:40:37,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206475 to 146245. [2021-06-06 00:40:38,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146245 states, 146244 states have (on average 4.6125037608380515) internal successors, (674551), 146244 states have internal predecessors, (674551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:38,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146245 states to 146245 states and 674551 transitions. [2021-06-06 00:40:38,652 INFO L78 Accepts]: Start accepts. Automaton has 146245 states and 674551 transitions. Word has length 25 [2021-06-06 00:40:38,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:40:38,652 INFO L482 AbstractCegarLoop]: Abstraction has 146245 states and 674551 transitions. [2021-06-06 00:40:38,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:38,653 INFO L276 IsEmpty]: Start isEmpty. Operand 146245 states and 674551 transitions. [2021-06-06 00:40:39,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:40:39,633 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:40:39,633 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:40:39,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:40:39,834 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:40:39,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:40:39,836 INFO L82 PathProgramCache]: Analyzing trace with hash 2033215848, now seen corresponding path program 14 times [2021-06-06 00:40:39,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:40:39,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570930135] [2021-06-06 00:40:39,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:40:39,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:40:39,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:39,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:40:39,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570930135] [2021-06-06 00:40:39,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570930135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:39,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379553846] [2021-06-06 00:40:39,874 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 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 [2021-06-06 00:40:39,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:40:39,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:40:39,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:40:39,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:40:40,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:40,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379553846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:40,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:40:40,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-06-06 00:40:40,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340537365] [2021-06-06 00:40:40,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:40:40,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:40:40,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:40:40,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:40:40,060 INFO L87 Difference]: Start difference. First operand 146245 states and 674551 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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) [2021-06-06 00:40:41,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:40:41,769 INFO L93 Difference]: Finished difference Result 158888 states and 723911 transitions. [2021-06-06 00:40:41,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:40:41,770 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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 25 [2021-06-06 00:40:41,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:40:42,360 INFO L225 Difference]: With dead ends: 158888 [2021-06-06 00:40:42,360 INFO L226 Difference]: Without dead ends: 158813 [2021-06-06 00:40:42,361 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:40:42,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158813 states. [2021-06-06 00:40:45,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158813 to 150237. [2021-06-06 00:40:46,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150237 states, 150236 states have (on average 4.599729758513273) internal successors, (691045), 150236 states have internal predecessors, (691045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:46,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150237 states to 150237 states and 691045 transitions. [2021-06-06 00:40:46,758 INFO L78 Accepts]: Start accepts. Automaton has 150237 states and 691045 transitions. Word has length 25 [2021-06-06 00:40:46,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:40:46,758 INFO L482 AbstractCegarLoop]: Abstraction has 150237 states and 691045 transitions. [2021-06-06 00:40:46,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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) [2021-06-06 00:40:46,758 INFO L276 IsEmpty]: Start isEmpty. Operand 150237 states and 691045 transitions. [2021-06-06 00:40:47,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:40:47,980 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:40:47,980 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:40:48,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:40:48,196 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:40:48,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:40:48,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1990562746, now seen corresponding path program 15 times [2021-06-06 00:40:48,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:40:48,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359225746] [2021-06-06 00:40:48,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:40:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:40:48,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:48,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:40:48,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359225746] [2021-06-06 00:40:48,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359225746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:48,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776427062] [2021-06-06 00:40:48,260 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 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 [2021-06-06 00:40:48,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:40:48,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:40:48,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:40:48,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:40:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:48,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776427062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:48,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:40:48,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-06 00:40:48,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471491914] [2021-06-06 00:40:48,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:40:48,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:40:48,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:40:48,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:40:48,450 INFO L87 Difference]: Start difference. First operand 150237 states and 691045 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:51,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:40:51,103 INFO L93 Difference]: Finished difference Result 274279 states and 1232729 transitions. [2021-06-06 00:40:51,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:40:51,104 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:40:51,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:40:52,621 INFO L225 Difference]: With dead ends: 274279 [2021-06-06 00:40:52,621 INFO L226 Difference]: Without dead ends: 274261 [2021-06-06 00:40:52,622 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 261.3ms TimeCoverageRelationStatistics Valid=256, Invalid=446, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:40:52,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274261 states. [2021-06-06 00:40:56,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274261 to 150288. [2021-06-06 00:40:57,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150288 states, 150287 states have (on average 4.600091824309488) internal successors, (691334), 150287 states have internal predecessors, (691334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:57,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150288 states to 150288 states and 691334 transitions. [2021-06-06 00:40:57,784 INFO L78 Accepts]: Start accepts. Automaton has 150288 states and 691334 transitions. Word has length 25 [2021-06-06 00:40:57,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:40:57,785 INFO L482 AbstractCegarLoop]: Abstraction has 150288 states and 691334 transitions. [2021-06-06 00:40:57,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:57,785 INFO L276 IsEmpty]: Start isEmpty. Operand 150288 states and 691334 transitions. [2021-06-06 00:40:58,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:40:58,128 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:40:58,128 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:40:58,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-06 00:40:58,329 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:40:58,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:40:58,329 INFO L82 PathProgramCache]: Analyzing trace with hash 681395814, now seen corresponding path program 16 times [2021-06-06 00:40:58,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:40:58,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549974010] [2021-06-06 00:40:58,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:40:58,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:40:58,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:58,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:40:58,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549974010] [2021-06-06 00:40:58,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549974010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:58,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117154426] [2021-06-06 00:40:58,371 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 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 [2021-06-06 00:40:58,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:40:58,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:40:58,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:40:58,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:40:59,091 WARN L205 SmtUtils]: Spent 562.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-06 00:40:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:59,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117154426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:59,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:40:59,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-06 00:40:59,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612557909] [2021-06-06 00:40:59,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:40:59,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:40:59,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:40:59,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:40:59,101 INFO L87 Difference]: Start difference. First operand 150288 states and 691334 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:41:00,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:41:00,962 INFO L93 Difference]: Finished difference Result 228605 states and 1039503 transitions. [2021-06-06 00:41:00,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:41:00,962 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:41:00,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:41:01,823 INFO L225 Difference]: With dead ends: 228605 [2021-06-06 00:41:01,823 INFO L226 Difference]: Without dead ends: 228605 [2021-06-06 00:41:01,823 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 174.5ms TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:41:02,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228605 states. [2021-06-06 00:41:05,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228605 to 150267. [2021-06-06 00:41:05,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150267 states, 150266 states have (on average 4.600089175195985) internal successors, (691237), 150266 states have internal predecessors, (691237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:41:07,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150267 states to 150267 states and 691237 transitions. [2021-06-06 00:41:07,150 INFO L78 Accepts]: Start accepts. Automaton has 150267 states and 691237 transitions. Word has length 25 [2021-06-06 00:41:07,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:41:07,150 INFO L482 AbstractCegarLoop]: Abstraction has 150267 states and 691237 transitions. [2021-06-06 00:41:07,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:41:07,151 INFO L276 IsEmpty]: Start isEmpty. Operand 150267 states and 691237 transitions. [2021-06-06 00:41:07,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:41:07,528 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:41:07,528 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:41:07,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:41:07,728 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:41:07,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:41:07,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1939792664, now seen corresponding path program 17 times [2021-06-06 00:41:07,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:41:07,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785010576] [2021-06-06 00:41:07,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:41:07,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:41:07,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:41:07,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:41:07,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785010576] [2021-06-06 00:41:07,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785010576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:41:07,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81249641] [2021-06-06 00:41:07,772 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 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 [2021-06-06 00:41:07,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:41:07,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:41:07,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:41:07,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:41:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:41:07,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81249641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:41:07,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:41:07,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-06 00:41:07,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080915097] [2021-06-06 00:41:07,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:41:07,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:41:07,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:41:07,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:41:07,876 INFO L87 Difference]: Start difference. First operand 150267 states and 691237 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-06-06 00:41:09,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:41:09,755 INFO L93 Difference]: Finished difference Result 181963 states and 827326 transitions. [2021-06-06 00:41:09,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:41:09,756 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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 25 [2021-06-06 00:41:09,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:41:10,422 INFO L225 Difference]: With dead ends: 181963 [2021-06-06 00:41:10,422 INFO L226 Difference]: Without dead ends: 181963 [2021-06-06 00:41:10,423 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 164.6ms TimeCoverageRelationStatistics Valid=205, Invalid=347, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:41:10,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181963 states. [2021-06-06 00:41:14,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181963 to 150263. [2021-06-06 00:41:14,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150263 states, 150262 states have (on average 4.600091839586855) internal successors, (691219), 150262 states have internal predecessors, (691219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:41:15,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150263 states to 150263 states and 691219 transitions. [2021-06-06 00:41:15,477 INFO L78 Accepts]: Start accepts. Automaton has 150263 states and 691219 transitions. Word has length 25 [2021-06-06 00:41:15,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:41:15,477 INFO L482 AbstractCegarLoop]: Abstraction has 150263 states and 691219 transitions. [2021-06-06 00:41:15,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-06-06 00:41:15,477 INFO L276 IsEmpty]: Start isEmpty. Operand 150263 states and 691219 transitions. [2021-06-06 00:41:15,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:41:15,859 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:41:15,859 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:41:16,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-06 00:41:16,059 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:41:16,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:41:16,060 INFO L82 PathProgramCache]: Analyzing trace with hash -186895918, now seen corresponding path program 18 times [2021-06-06 00:41:16,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:41:16,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421889341] [2021-06-06 00:41:16,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:41:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:41:16,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:41:16,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:41:16,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421889341] [2021-06-06 00:41:16,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421889341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:41:16,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894069623] [2021-06-06 00:41:16,105 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-06 00:41:16,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-06 00:41:16,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:41:16,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-06 00:41:16,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:41:16,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:41:16,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894069623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:41:16,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:41:16,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-06-06 00:41:16,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190933198] [2021-06-06 00:41:16,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:41:16,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:41:16,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:41:16,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:41:16,212 INFO L87 Difference]: Start difference. First operand 150263 states and 691219 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:41:17,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:41:17,904 INFO L93 Difference]: Finished difference Result 192198 states and 881415 transitions. [2021-06-06 00:41:17,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:41:17,905 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:41:17,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:41:18,615 INFO L225 Difference]: With dead ends: 192198 [2021-06-06 00:41:18,616 INFO L226 Difference]: Without dead ends: 192052 [2021-06-06 00:41:18,616 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:41:18,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192052 states. [2021-06-06 00:41:22,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192052 to 150747. [2021-06-06 00:41:22,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150747 states, 150746 states have (on average 4.600427208682154) internal successors, (693496), 150746 states have internal predecessors, (693496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:41:23,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150747 states to 150747 states and 693496 transitions. [2021-06-06 00:41:23,069 INFO L78 Accepts]: Start accepts. Automaton has 150747 states and 693496 transitions. Word has length 25 [2021-06-06 00:41:23,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:41:23,069 INFO L482 AbstractCegarLoop]: Abstraction has 150747 states and 693496 transitions. [2021-06-06 00:41:23,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:41:23,069 INFO L276 IsEmpty]: Start isEmpty. Operand 150747 states and 693496 transitions. [2021-06-06 00:41:23,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:41:23,993 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:41:23,993 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:41:24,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:41:24,210 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:41:24,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:41:24,210 INFO L82 PathProgramCache]: Analyzing trace with hash -567050456, now seen corresponding path program 19 times [2021-06-06 00:41:24,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:41:24,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549998902] [2021-06-06 00:41:24,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:41:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:41:24,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:41:24,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:41:24,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549998902] [2021-06-06 00:41:24,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549998902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:41:24,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361298518] [2021-06-06 00:41:24,253 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 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 [2021-06-06 00:41:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:41:24,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-06 00:41:24,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:41:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:41:24,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361298518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:41:24,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:41:24,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-06-06 00:41:24,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544550755] [2021-06-06 00:41:24,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:41:24,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:41:24,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:41:24,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:41:24,337 INFO L87 Difference]: Start difference. First operand 150747 states and 693496 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:41:25,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:41:25,363 INFO L93 Difference]: Finished difference Result 151664 states and 696652 transitions. [2021-06-06 00:41:25,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:41:25,364 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:41:25,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:41:26,399 INFO L225 Difference]: With dead ends: 151664 [2021-06-06 00:41:26,399 INFO L226 Difference]: Without dead ends: 151407 [2021-06-06 00:41:26,400 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:41:26,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151407 states. [2021-06-06 00:41:29,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151407 to 150715. [2021-06-06 00:41:29,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150715 states, 150714 states have (on average 4.600030521384874) internal successors, (693289), 150714 states have internal predecessors, (693289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:41:30,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150715 states to 150715 states and 693289 transitions. [2021-06-06 00:41:30,794 INFO L78 Accepts]: Start accepts. Automaton has 150715 states and 693289 transitions. Word has length 25 [2021-06-06 00:41:30,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:41:30,794 INFO L482 AbstractCegarLoop]: Abstraction has 150715 states and 693289 transitions. [2021-06-06 00:41:30,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:41:30,794 INFO L276 IsEmpty]: Start isEmpty. Operand 150715 states and 693289 transitions. [2021-06-06 00:41:31,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:41:31,145 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:41:31,145 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:41:31,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-06 00:41:31,345 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:41:31,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:41:31,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1169845454, now seen corresponding path program 20 times [2021-06-06 00:41:31,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:41:31,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472313232] [2021-06-06 00:41:31,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:41:31,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:41:31,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:41:31,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:41:31,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472313232] [2021-06-06 00:41:31,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472313232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:41:31,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165993001] [2021-06-06 00:41:31,392 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 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 [2021-06-06 00:41:31,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:41:31,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:41:31,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-06 00:41:31,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:41:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:41:31,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165993001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:41:31,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:41:31,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-06 00:41:31,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242488445] [2021-06-06 00:41:31,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:41:31,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:41:31,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:41:31,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:41:31,503 INFO L87 Difference]: Start difference. First operand 150715 states and 693289 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:41:33,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:41:33,605 INFO L93 Difference]: Finished difference Result 193192 states and 885923 transitions. [2021-06-06 00:41:33,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:41:33,606 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:41:33,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:41:34,633 INFO L225 Difference]: With dead ends: 193192 [2021-06-06 00:41:34,633 INFO L226 Difference]: Without dead ends: 193064 [2021-06-06 00:41:34,633 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:41:34,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193064 states. [2021-06-06 00:41:38,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193064 to 150929. [2021-06-06 00:41:38,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150929 states, 150928 states have (on average 4.599756175129864) internal successors, (694232), 150928 states have internal predecessors, (694232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:41:39,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150929 states to 150929 states and 694232 transitions. [2021-06-06 00:41:39,240 INFO L78 Accepts]: Start accepts. Automaton has 150929 states and 694232 transitions. Word has length 25 [2021-06-06 00:41:39,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:41:39,240 INFO L482 AbstractCegarLoop]: Abstraction has 150929 states and 694232 transitions. [2021-06-06 00:41:39,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:41:39,240 INFO L276 IsEmpty]: Start isEmpty. Operand 150929 states and 694232 transitions. [2021-06-06 00:41:40,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:41:40,193 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:41:40,193 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:41:40,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-06 00:41:40,405 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:41:40,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:41:40,405 INFO L82 PathProgramCache]: Analyzing trace with hash 919442638, now seen corresponding path program 8 times [2021-06-06 00:41:40,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:41:40,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143403813] [2021-06-06 00:41:40,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:41:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:41:40,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:41:40,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:41:40,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143403813] [2021-06-06 00:41:40,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143403813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:41:40,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421659579] [2021-06-06 00:41:40,427 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 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 [2021-06-06 00:41:40,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:41:40,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:41:40,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:41:40,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:41:40,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:41:40,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421659579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:41:40,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:41:40,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-06 00:41:40,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684161247] [2021-06-06 00:41:40,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:41:40,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:41:40,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:41:40,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:41:40,504 INFO L87 Difference]: Start difference. First operand 150929 states and 694232 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) 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) [2021-06-06 00:41:42,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:41:42,051 INFO L93 Difference]: Finished difference Result 156612 states and 717259 transitions. [2021-06-06 00:41:42,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:41:42,073 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) 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 25 [2021-06-06 00:41:42,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:41:42,646 INFO L225 Difference]: With dead ends: 156612 [2021-06-06 00:41:42,647 INFO L226 Difference]: Without dead ends: 156525 [2021-06-06 00:41:42,647 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:41:42,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156525 states. [2021-06-06 00:41:45,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156525 to 152518. [2021-06-06 00:41:46,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152518 states, 152517 states have (on average 4.600287181101123) internal successors, (701622), 152517 states have internal predecessors, (701622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:41:47,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152518 states to 152518 states and 701622 transitions. [2021-06-06 00:41:47,167 INFO L78 Accepts]: Start accepts. Automaton has 152518 states and 701622 transitions. Word has length 25 [2021-06-06 00:41:47,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:41:47,168 INFO L482 AbstractCegarLoop]: Abstraction has 152518 states and 701622 transitions. [2021-06-06 00:41:47,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) 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) [2021-06-06 00:41:47,168 INFO L276 IsEmpty]: Start isEmpty. Operand 152518 states and 701622 transitions. [2021-06-06 00:41:47,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:41:47,510 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:41:47,510 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:41:47,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:41:47,711 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:41:47,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:41:47,711 INFO L82 PathProgramCache]: Analyzing trace with hash 920853582, now seen corresponding path program 4 times [2021-06-06 00:41:47,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:41:47,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738636347] [2021-06-06 00:41:47,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:41:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:41:47,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:41:47,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:41:47,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738636347] [2021-06-06 00:41:47,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738636347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:41:47,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004523310] [2021-06-06 00:41:47,733 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 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 [2021-06-06 00:41:47,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:41:47,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:41:47,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:41:47,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:41:47,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:41:47,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004523310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:41:47,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:41:47,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-06 00:41:47,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338898413] [2021-06-06 00:41:47,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:41:47,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:41:47,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:41:47,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:41:47,803 INFO L87 Difference]: Start difference. First operand 152518 states and 701622 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:41:49,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:41:49,418 INFO L93 Difference]: Finished difference Result 156333 states and 716897 transitions. [2021-06-06 00:41:49,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:41:49,419 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:41:49,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:41:50,018 INFO L225 Difference]: With dead ends: 156333 [2021-06-06 00:41:50,018 INFO L226 Difference]: Without dead ends: 156315 [2021-06-06 00:41:50,018 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:41:50,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156315 states. [2021-06-06 00:41:53,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156315 to 152720. [2021-06-06 00:41:53,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152720 states, 152719 states have (on average 4.600062860547803) internal successors, (702517), 152719 states have internal predecessors, (702517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:41:54,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152720 states to 152720 states and 702517 transitions. [2021-06-06 00:41:54,456 INFO L78 Accepts]: Start accepts. Automaton has 152720 states and 702517 transitions. Word has length 25 [2021-06-06 00:41:54,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:41:54,456 INFO L482 AbstractCegarLoop]: Abstraction has 152720 states and 702517 transitions. [2021-06-06 00:41:54,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:41:54,456 INFO L276 IsEmpty]: Start isEmpty. Operand 152720 states and 702517 transitions. [2021-06-06 00:41:55,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:41:55,373 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:41:55,373 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:41:55,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-06 00:41:55,588 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:41:55,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:41:55,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1371587662, now seen corresponding path program 5 times [2021-06-06 00:41:55,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:41:55,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319886940] [2021-06-06 00:41:55,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:41:55,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:41:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:41:55,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:41:55,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319886940] [2021-06-06 00:41:55,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319886940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:41:55,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724879909] [2021-06-06 00:41:55,612 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 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 [2021-06-06 00:41:55,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:41:55,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:41:55,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:41:55,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:41:55,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:41:55,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724879909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:41:55,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:41:55,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-06 00:41:55,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857488743] [2021-06-06 00:41:55,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:41:55,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:41:55,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:41:55,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:41:55,687 INFO L87 Difference]: Start difference. First operand 152720 states and 702517 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:41:56,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:41:56,716 INFO L93 Difference]: Finished difference Result 161541 states and 737182 transitions. [2021-06-06 00:41:56,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:41:56,716 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:41:56,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:41:57,810 INFO L225 Difference]: With dead ends: 161541 [2021-06-06 00:41:57,810 INFO L226 Difference]: Without dead ends: 161541 [2021-06-06 00:41:57,810 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:41:57,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161541 states. [2021-06-06 00:42:01,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161541 to 152520. [2021-06-06 00:42:01,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152520 states, 152519 states have (on average 4.598823753106171) internal successors, (701408), 152519 states have internal predecessors, (701408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:42:02,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152520 states to 152520 states and 701408 transitions. [2021-06-06 00:42:02,443 INFO L78 Accepts]: Start accepts. Automaton has 152520 states and 701408 transitions. Word has length 25 [2021-06-06 00:42:02,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:42:02,443 INFO L482 AbstractCegarLoop]: Abstraction has 152520 states and 701408 transitions. [2021-06-06 00:42:02,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:42:02,443 INFO L276 IsEmpty]: Start isEmpty. Operand 152520 states and 701408 transitions. [2021-06-06 00:42:02,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:42:02,777 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:42:02,777 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:42:02,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:42:02,981 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:42:02,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:42:02,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1828705168, now seen corresponding path program 6 times [2021-06-06 00:42:02,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:42:02,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38980769] [2021-06-06 00:42:02,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:42:02,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:42:03,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:42:03,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:42:03,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38980769] [2021-06-06 00:42:03,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38980769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:42:03,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351963128] [2021-06-06 00:42:03,005 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 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 [2021-06-06 00:42:03,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-06 00:42:03,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:42:03,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:42:03,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:42:03,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:42:03,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351963128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:42:03,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:42:03,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-06 00:42:03,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904716802] [2021-06-06 00:42:03,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:42:03,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:42:03,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:42:03,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:42:03,077 INFO L87 Difference]: Start difference. First operand 152520 states and 701408 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-06-06 00:42:04,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:42:04,720 INFO L93 Difference]: Finished difference Result 156029 states and 715406 transitions. [2021-06-06 00:42:04,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:42:04,721 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 25 [2021-06-06 00:42:04,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:42:05,304 INFO L225 Difference]: With dead ends: 156029 [2021-06-06 00:42:05,304 INFO L226 Difference]: Without dead ends: 156011 [2021-06-06 00:42:05,304 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:42:05,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156011 states. [2021-06-06 00:42:08,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156011 to 152534. [2021-06-06 00:42:09,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152534 states, 152533 states have (on average 4.598604892056145) internal successors, (701439), 152533 states have internal predecessors, (701439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:42:09,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152534 states to 152534 states and 701439 transitions. [2021-06-06 00:42:09,750 INFO L78 Accepts]: Start accepts. Automaton has 152534 states and 701439 transitions. Word has length 25 [2021-06-06 00:42:09,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:42:09,751 INFO L482 AbstractCegarLoop]: Abstraction has 152534 states and 701439 transitions. [2021-06-06 00:42:09,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-06-06 00:42:09,751 INFO L276 IsEmpty]: Start isEmpty. Operand 152534 states and 701439 transitions. [2021-06-06 00:42:10,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:42:10,668 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:42:10,668 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:42:10,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-06 00:42:10,881 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:42:10,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:42:10,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1290086910, now seen corresponding path program 7 times [2021-06-06 00:42:10,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:42:10,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154456230] [2021-06-06 00:42:10,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:42:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:42:10,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:42:10,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:42:10,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154456230] [2021-06-06 00:42:10,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154456230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:42:10,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871534135] [2021-06-06 00:42:10,911 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 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 [2021-06-06 00:42:10,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:42:10,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:42:10,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:42:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:42:10,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871534135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:42:10,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:42:10,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-06 00:42:10,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615081156] [2021-06-06 00:42:10,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:42:10,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:42:10,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:42:10,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:42:10,992 INFO L87 Difference]: Start difference. First operand 152534 states and 701439 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-06-06 00:42:12,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:42:12,657 INFO L93 Difference]: Finished difference Result 187205 states and 846532 transitions. [2021-06-06 00:42:12,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:42:12,658 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 25 [2021-06-06 00:42:12,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:42:13,312 INFO L225 Difference]: With dead ends: 187205 [2021-06-06 00:42:13,312 INFO L226 Difference]: Without dead ends: 187205 [2021-06-06 00:42:13,312 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:42:13,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187205 states. [2021-06-06 00:42:17,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187205 to 152752. [2021-06-06 00:42:17,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152752 states, 152751 states have (on average 4.597796413771432) internal successors, (702318), 152751 states have internal predecessors, (702318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:42:18,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152752 states to 152752 states and 702318 transitions. [2021-06-06 00:42:18,159 INFO L78 Accepts]: Start accepts. Automaton has 152752 states and 702318 transitions. Word has length 25 [2021-06-06 00:42:18,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:42:18,160 INFO L482 AbstractCegarLoop]: Abstraction has 152752 states and 702318 transitions. [2021-06-06 00:42:18,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-06-06 00:42:18,160 INFO L276 IsEmpty]: Start isEmpty. Operand 152752 states and 702318 transitions. [2021-06-06 00:42:18,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:42:18,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:42:18,488 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:42:18,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:42:18,689 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:42:18,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:42:18,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2119082106, now seen corresponding path program 8 times [2021-06-06 00:42:18,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:42:18,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480619616] [2021-06-06 00:42:18,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:42:18,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:42:18,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:42:18,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:42:18,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480619616] [2021-06-06 00:42:18,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480619616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:42:18,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543553440] [2021-06-06 00:42:18,748 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 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 [2021-06-06 00:42:18,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:42:18,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:42:18,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-06 00:42:18,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:42:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:42:18,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543553440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:42:18,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:42:18,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-06 00:42:18,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752697988] [2021-06-06 00:42:18,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:42:18,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:42:18,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:42:18,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:42:18,839 INFO L87 Difference]: Start difference. First operand 152752 states and 702318 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-06-06 00:42:20,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:42:20,426 INFO L93 Difference]: Finished difference Result 153348 states and 704507 transitions. [2021-06-06 00:42:20,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:42:20,428 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 25 [2021-06-06 00:42:20,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:42:21,000 INFO L225 Difference]: With dead ends: 153348 [2021-06-06 00:42:21,000 INFO L226 Difference]: Without dead ends: 153248 [2021-06-06 00:42:21,000 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:42:21,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153248 states. [2021-06-06 00:42:24,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153248 to 152808. [2021-06-06 00:42:25,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152808 states, 152807 states have (on average 4.597446452060442) internal successors, (702522), 152807 states have internal predecessors, (702522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:42:25,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152808 states to 152808 states and 702522 transitions. [2021-06-06 00:42:25,828 INFO L78 Accepts]: Start accepts. Automaton has 152808 states and 702522 transitions. Word has length 25 [2021-06-06 00:42:25,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:42:25,828 INFO L482 AbstractCegarLoop]: Abstraction has 152808 states and 702522 transitions. [2021-06-06 00:42:25,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-06-06 00:42:25,828 INFO L276 IsEmpty]: Start isEmpty. Operand 152808 states and 702522 transitions. [2021-06-06 00:42:26,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:42:26,729 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:42:26,730 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:42:26,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:42:26,937 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:42:26,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:42:26,937 INFO L82 PathProgramCache]: Analyzing trace with hash -656052858, now seen corresponding path program 9 times [2021-06-06 00:42:26,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:42:26,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352132287] [2021-06-06 00:42:26,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:42:26,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:42:26,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:42:26,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:42:26,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352132287] [2021-06-06 00:42:26,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352132287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:42:26,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748704305] [2021-06-06 00:42:26,970 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 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 [2021-06-06 00:42:27,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:42:27,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:42:27,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:42:27,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:42:27,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:42:27,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748704305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:42:27,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:42:27,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-06 00:42:27,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101473108] [2021-06-06 00:42:27,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:42:27,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:42:27,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:42:27,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:42:27,069 INFO L87 Difference]: Start difference. First operand 152808 states and 702522 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:42:29,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:42:29,068 INFO L93 Difference]: Finished difference Result 254992 states and 1153363 transitions. [2021-06-06 00:42:29,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:42:29,069 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:42:29,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:42:30,037 INFO L225 Difference]: With dead ends: 254992 [2021-06-06 00:42:30,038 INFO L226 Difference]: Without dead ends: 254992 [2021-06-06 00:42:30,038 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 108.9ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:42:30,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254992 states. [2021-06-06 00:42:35,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254992 to 167585. [2021-06-06 00:42:35,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167585 states, 167584 states have (on average 4.616341655527974) internal successors, (773625), 167584 states have internal predecessors, (773625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:42:36,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167585 states to 167585 states and 773625 transitions. [2021-06-06 00:42:36,144 INFO L78 Accepts]: Start accepts. Automaton has 167585 states and 773625 transitions. Word has length 25 [2021-06-06 00:42:36,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:42:36,144 INFO L482 AbstractCegarLoop]: Abstraction has 167585 states and 773625 transitions. [2021-06-06 00:42:36,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:42:36,144 INFO L276 IsEmpty]: Start isEmpty. Operand 167585 states and 773625 transitions. [2021-06-06 00:42:37,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:42:37,192 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:42:37,192 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:42:37,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:42:37,399 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:42:37,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:42:37,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1715216728, now seen corresponding path program 10 times [2021-06-06 00:42:37,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:42:37,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797591587] [2021-06-06 00:42:37,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:42:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:42:37,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:42:37,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:42:37,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797591587] [2021-06-06 00:42:37,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797591587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:42:37,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796579248] [2021-06-06 00:42:37,429 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-06 00:42:37,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:42:37,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:42:37,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:42:37,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:42:37,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:42:37,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796579248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:42:37,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:42:37,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-06 00:42:37,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203447652] [2021-06-06 00:42:37,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:42:37,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:42:37,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:42:37,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:42:37,523 INFO L87 Difference]: Start difference. First operand 167585 states and 773625 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-06-06 00:42:39,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:42:39,443 INFO L93 Difference]: Finished difference Result 216803 states and 978719 transitions. [2021-06-06 00:42:39,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:42:39,443 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 25 [2021-06-06 00:42:39,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:42:40,271 INFO L225 Difference]: With dead ends: 216803 [2021-06-06 00:42:40,271 INFO L226 Difference]: Without dead ends: 216803 [2021-06-06 00:42:40,272 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 87.8ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:42:40,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216803 states. [2021-06-06 00:42:44,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216803 to 169071. [2021-06-06 00:42:44,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169071 states, 169070 states have (on average 4.613083338262258) internal successors, (779934), 169070 states have internal predecessors, (779934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:42:46,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169071 states to 169071 states and 779934 transitions. [2021-06-06 00:42:46,154 INFO L78 Accepts]: Start accepts. Automaton has 169071 states and 779934 transitions. Word has length 25 [2021-06-06 00:42:46,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:42:46,154 INFO L482 AbstractCegarLoop]: Abstraction has 169071 states and 779934 transitions. [2021-06-06 00:42:46,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-06-06 00:42:46,154 INFO L276 IsEmpty]: Start isEmpty. Operand 169071 states and 779934 transitions. [2021-06-06 00:42:46,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:42:46,539 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:42:46,539 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:42:46,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:42:46,739 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:42:46,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:42:46,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1504675330, now seen corresponding path program 11 times [2021-06-06 00:42:46,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:42:46,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715113166] [2021-06-06 00:42:46,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:42:46,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:42:46,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:42:46,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:42:46,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715113166] [2021-06-06 00:42:46,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715113166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:42:46,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513463021] [2021-06-06 00:42:46,844 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 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 [2021-06-06 00:42:46,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:42:46,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:42:46,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-06 00:42:46,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:42:46,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:42:46,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513463021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:42:46,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:42:46,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-06 00:42:46,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895059122] [2021-06-06 00:42:46,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:42:46,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:42:46,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:42:46,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:42:46,971 INFO L87 Difference]: Start difference. First operand 169071 states and 779934 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:42:48,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:42:48,871 INFO L93 Difference]: Finished difference Result 190564 states and 868690 transitions. [2021-06-06 00:42:48,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:42:48,872 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:42:48,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:42:50,012 INFO L225 Difference]: With dead ends: 190564 [2021-06-06 00:42:50,012 INFO L226 Difference]: Without dead ends: 190336 [2021-06-06 00:42:50,012 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 166.3ms TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:42:50,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190336 states. [2021-06-06 00:42:54,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190336 to 169413. [2021-06-06 00:42:54,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169413 states, 169412 states have (on average 4.612908176516422) internal successors, (781482), 169412 states have internal predecessors, (781482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:42:55,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169413 states to 169413 states and 781482 transitions. [2021-06-06 00:42:55,212 INFO L78 Accepts]: Start accepts. Automaton has 169413 states and 781482 transitions. Word has length 25 [2021-06-06 00:42:55,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:42:55,212 INFO L482 AbstractCegarLoop]: Abstraction has 169413 states and 781482 transitions. [2021-06-06 00:42:55,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:42:55,212 INFO L276 IsEmpty]: Start isEmpty. Operand 169413 states and 781482 transitions. [2021-06-06 00:42:56,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:42:56,205 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:42:56,205 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:42:56,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-06 00:42:56,417 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:42:56,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:42:56,417 INFO L82 PathProgramCache]: Analyzing trace with hash -423308966, now seen corresponding path program 12 times [2021-06-06 00:42:56,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:42:56,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639225813] [2021-06-06 00:42:56,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:42:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:42:56,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:42:56,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:42:56,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639225813] [2021-06-06 00:42:56,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639225813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:42:56,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127375908] [2021-06-06 00:42:56,450 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 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 [2021-06-06 00:42:56,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-06 00:42:56,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:42:56,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:42:56,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:42:56,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:42:56,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127375908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:42:56,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:42:56,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-06 00:42:56,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106852695] [2021-06-06 00:42:56,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:42:56,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:42:56,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:42:56,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:42:56,547 INFO L87 Difference]: Start difference. First operand 169413 states and 781482 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:42:58,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:42:58,667 INFO L93 Difference]: Finished difference Result 262079 states and 1183330 transitions. [2021-06-06 00:42:58,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:42:58,667 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:42:58,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:42:59,657 INFO L225 Difference]: With dead ends: 262079 [2021-06-06 00:42:59,657 INFO L226 Difference]: Without dead ends: 262061 [2021-06-06 00:42:59,657 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 159.8ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:43:00,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262061 states. [2021-06-06 00:43:04,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262061 to 170992. [2021-06-06 00:43:04,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170992 states, 170991 states have (on average 4.612985478767889) internal successors, (788779), 170991 states have internal predecessors, (788779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:43:06,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170992 states to 170992 states and 788779 transitions. [2021-06-06 00:43:06,347 INFO L78 Accepts]: Start accepts. Automaton has 170992 states and 788779 transitions. Word has length 25 [2021-06-06 00:43:06,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:43:06,347 INFO L482 AbstractCegarLoop]: Abstraction has 170992 states and 788779 transitions. [2021-06-06 00:43:06,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:43:06,347 INFO L276 IsEmpty]: Start isEmpty. Operand 170992 states and 788779 transitions. [2021-06-06 00:43:06,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:43:06,746 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:43:06,746 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:43:06,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:43:06,947 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:43:06,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:43:06,947 INFO L82 PathProgramCache]: Analyzing trace with hash -206280976, now seen corresponding path program 13 times [2021-06-06 00:43:06,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:43:06,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971886421] [2021-06-06 00:43:06,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:43:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:43:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:43:06,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:43:06,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971886421] [2021-06-06 00:43:06,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971886421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:43:06,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802531549] [2021-06-06 00:43:06,976 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 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 [2021-06-06 00:43:07,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:43:07,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:43:07,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:43:07,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:43:07,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802531549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:43:07,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:43:07,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-06 00:43:07,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881272628] [2021-06-06 00:43:07,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:43:07,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:43:07,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:43:07,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:43:07,067 INFO L87 Difference]: Start difference. First operand 170992 states and 788779 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:43:09,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:43:09,185 INFO L93 Difference]: Finished difference Result 223330 states and 1021133 transitions. [2021-06-06 00:43:09,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:43:09,186 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:43:09,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:43:10,042 INFO L225 Difference]: With dead ends: 223330 [2021-06-06 00:43:10,042 INFO L226 Difference]: Without dead ends: 223330 [2021-06-06 00:43:10,042 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 131.7ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:43:10,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223330 states. [2021-06-06 00:43:15,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223330 to 171112. [2021-06-06 00:43:15,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171112 states, 171111 states have (on average 4.612830268071603) internal successors, (789306), 171111 states have internal predecessors, (789306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:43:16,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171112 states to 171112 states and 789306 transitions. [2021-06-06 00:43:16,538 INFO L78 Accepts]: Start accepts. Automaton has 171112 states and 789306 transitions. Word has length 25 [2021-06-06 00:43:16,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:43:16,538 INFO L482 AbstractCegarLoop]: Abstraction has 171112 states and 789306 transitions. [2021-06-06 00:43:16,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:43:16,538 INFO L276 IsEmpty]: Start isEmpty. Operand 171112 states and 789306 transitions. [2021-06-06 00:43:16,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:43:16,921 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:43:16,921 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:43:17,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-06 00:43:17,122 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:43:17,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:43:17,122 INFO L82 PathProgramCache]: Analyzing trace with hash 64907726, now seen corresponding path program 14 times [2021-06-06 00:43:17,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:43:17,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810159423] [2021-06-06 00:43:17,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:43:17,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:43:17,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:43:17,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:43:17,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810159423] [2021-06-06 00:43:17,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810159423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:43:17,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049918691] [2021-06-06 00:43:17,154 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 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 [2021-06-06 00:43:17,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:43:17,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:43:17,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:43:17,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:43:17,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:43:17,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049918691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:43:17,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:43:17,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-06 00:43:17,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786499101] [2021-06-06 00:43:17,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:43:17,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:43:17,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:43:17,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:43:17,258 INFO L87 Difference]: Start difference. First operand 171112 states and 789306 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:43:19,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:43:19,993 INFO L93 Difference]: Finished difference Result 271293 states and 1227721 transitions. [2021-06-06 00:43:19,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:43:19,998 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:43:19,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:43:21,070 INFO L225 Difference]: With dead ends: 271293 [2021-06-06 00:43:21,071 INFO L226 Difference]: Without dead ends: 271293 [2021-06-06 00:43:21,071 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 110.2ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:43:21,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271293 states. [2021-06-06 00:43:26,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271293 to 180348. [2021-06-06 00:43:26,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180348 states, 180347 states have (on average 4.606841256023111) internal successors, (830830), 180347 states have internal predecessors, (830830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:43:28,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180348 states to 180348 states and 830830 transitions. [2021-06-06 00:43:28,206 INFO L78 Accepts]: Start accepts. Automaton has 180348 states and 830830 transitions. Word has length 25 [2021-06-06 00:43:28,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:43:28,206 INFO L482 AbstractCegarLoop]: Abstraction has 180348 states and 830830 transitions. [2021-06-06 00:43:28,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:43:28,206 INFO L276 IsEmpty]: Start isEmpty. Operand 180348 states and 830830 transitions. [2021-06-06 00:43:28,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:43:28,627 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:43:28,627 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:43:28,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:43:28,828 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:43:28,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:43:28,828 INFO L82 PathProgramCache]: Analyzing trace with hash 115677808, now seen corresponding path program 15 times [2021-06-06 00:43:28,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:43:28,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92053969] [2021-06-06 00:43:28,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:43:28,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:43:28,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:43:28,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:43:28,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92053969] [2021-06-06 00:43:28,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92053969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:43:28,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131947793] [2021-06-06 00:43:28,877 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 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 [2021-06-06 00:43:28,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:43:28,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:43:28,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:43:28,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:43:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:43:28,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131947793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:43:28,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:43:28,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-06 00:43:28,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239752690] [2021-06-06 00:43:28,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:43:28,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:43:28,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:43:28,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:43:28,983 INFO L87 Difference]: Start difference. First operand 180348 states and 830830 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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) [2021-06-06 00:43:31,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:43:31,071 INFO L93 Difference]: Finished difference Result 228294 states and 1029691 transitions. [2021-06-06 00:43:31,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:43:31,071 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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 25 [2021-06-06 00:43:31,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:43:32,407 INFO L225 Difference]: With dead ends: 228294 [2021-06-06 00:43:32,407 INFO L226 Difference]: Without dead ends: 228294 [2021-06-06 00:43:32,408 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:43:32,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228294 states. [2021-06-06 00:43:37,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228294 to 181280. [2021-06-06 00:43:37,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181280 states, 181279 states have (on average 4.603886826383641) internal successors, (834588), 181279 states have internal predecessors, (834588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:43:38,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181280 states to 181280 states and 834588 transitions. [2021-06-06 00:43:38,870 INFO L78 Accepts]: Start accepts. Automaton has 181280 states and 834588 transitions. Word has length 25 [2021-06-06 00:43:38,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:43:38,870 INFO L482 AbstractCegarLoop]: Abstraction has 181280 states and 834588 transitions. [2021-06-06 00:43:38,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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) [2021-06-06 00:43:38,870 INFO L276 IsEmpty]: Start isEmpty. Operand 181280 states and 834588 transitions. [2021-06-06 00:43:39,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:43:39,354 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:43:39,354 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:43:39,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-06 00:43:39,569 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:43:39,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:43:39,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1557868062, now seen corresponding path program 16 times [2021-06-06 00:43:39,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:43:39,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766215695] [2021-06-06 00:43:39,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:43:39,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:43:39,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:43:39,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:43:39,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766215695] [2021-06-06 00:43:39,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766215695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:43:39,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521724438] [2021-06-06 00:43:39,615 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 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 [2021-06-06 00:43:39,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:43:39,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:43:39,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-06 00:43:39,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:43:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:43:39,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521724438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:43:39,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:43:39,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-06 00:43:39,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798953482] [2021-06-06 00:43:39,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:43:39,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:43:39,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:43:39,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:43:39,781 INFO L87 Difference]: Start difference. First operand 181280 states and 834588 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:43:41,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:43:41,710 INFO L93 Difference]: Finished difference Result 206101 states and 938235 transitions. [2021-06-06 00:43:41,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-06 00:43:41,720 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:43:41,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:43:42,512 INFO L225 Difference]: With dead ends: 206101 [2021-06-06 00:43:42,513 INFO L226 Difference]: Without dead ends: 205937 [2021-06-06 00:43:42,513 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 103.8ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:43:43,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205937 states. [2021-06-06 00:43:47,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205937 to 181308. [2021-06-06 00:43:47,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181308 states, 181307 states have (on average 4.603799081116559) internal successors, (834701), 181307 states have internal predecessors, (834701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:43:48,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181308 states to 181308 states and 834701 transitions. [2021-06-06 00:43:48,240 INFO L78 Accepts]: Start accepts. Automaton has 181308 states and 834701 transitions. Word has length 25 [2021-06-06 00:43:48,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:43:48,240 INFO L482 AbstractCegarLoop]: Abstraction has 181308 states and 834701 transitions. [2021-06-06 00:43:48,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:43:48,240 INFO L276 IsEmpty]: Start isEmpty. Operand 181308 states and 834701 transitions. [2021-06-06 00:43:49,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:43:49,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:43:49,318 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:43:49,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-06 00:43:49,518 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:43:49,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:43:49,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1245125948, now seen corresponding path program 17 times [2021-06-06 00:43:49,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:43:49,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565876000] [2021-06-06 00:43:49,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:43:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:43:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:43:49,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:43:49,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565876000] [2021-06-06 00:43:49,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565876000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:43:49,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071316971] [2021-06-06 00:43:49,565 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 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 [2021-06-06 00:43:49,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:43:49,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:43:49,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-06 00:43:49,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:43:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:43:49,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071316971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:43:49,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:43:49,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-06 00:43:49,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438005015] [2021-06-06 00:43:49,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:43:49,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:43:49,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:43:49,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:43:49,651 INFO L87 Difference]: Start difference. First operand 181308 states and 834701 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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) [2021-06-06 00:43:51,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:43:51,340 INFO L93 Difference]: Finished difference Result 182017 states and 837141 transitions. [2021-06-06 00:43:51,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:43:51,340 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 25 [2021-06-06 00:43:51,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:43:51,994 INFO L225 Difference]: With dead ends: 182017 [2021-06-06 00:43:51,994 INFO L226 Difference]: Without dead ends: 181917 [2021-06-06 00:43:51,995 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:43:52,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181917 states. [2021-06-06 00:43:56,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181917 to 181308. [2021-06-06 00:43:56,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181308 states, 181307 states have (on average 4.603650162431677) internal successors, (834674), 181307 states have internal predecessors, (834674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:43:57,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181308 states to 181308 states and 834674 transitions. [2021-06-06 00:43:57,613 INFO L78 Accepts]: Start accepts. Automaton has 181308 states and 834674 transitions. Word has length 25 [2021-06-06 00:43:57,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:43:57,613 INFO L482 AbstractCegarLoop]: Abstraction has 181308 states and 834674 transitions. [2021-06-06 00:43:57,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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) [2021-06-06 00:43:57,613 INFO L276 IsEmpty]: Start isEmpty. Operand 181308 states and 834674 transitions. [2021-06-06 00:43:58,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:43:58,606 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:43:58,606 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:43:58,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-06 00:43:58,822 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:43:58,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:43:58,823 INFO L82 PathProgramCache]: Analyzing trace with hash 984830642, now seen corresponding path program 7 times [2021-06-06 00:43:58,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:43:58,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352215608] [2021-06-06 00:43:58,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:43:58,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:43:58,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:43:58,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:43:58,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352215608] [2021-06-06 00:43:58,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352215608] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:43:58,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:43:58,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-06 00:43:58,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35267298] [2021-06-06 00:43:58,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:43:58,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:43:58,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:43:58,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:43:58,850 INFO L87 Difference]: Start difference. First operand 181308 states and 834674 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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) [2021-06-06 00:44:00,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:44:00,759 INFO L93 Difference]: Finished difference Result 198214 states and 888498 transitions. [2021-06-06 00:44:00,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-06 00:44:00,759 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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 25 [2021-06-06 00:44:00,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:44:01,439 INFO L225 Difference]: With dead ends: 198214 [2021-06-06 00:44:01,439 INFO L226 Difference]: Without dead ends: 164346 [2021-06-06 00:44:01,439 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:44:01,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164346 states. [2021-06-06 00:44:04,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164346 to 125085. [2021-06-06 00:44:04,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125085 states, 125084 states have (on average 4.721331265389658) internal successors, (590563), 125084 states have internal predecessors, (590563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:44:05,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125085 states to 125085 states and 590563 transitions. [2021-06-06 00:44:05,829 INFO L78 Accepts]: Start accepts. Automaton has 125085 states and 590563 transitions. Word has length 25 [2021-06-06 00:44:05,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:44:05,829 INFO L482 AbstractCegarLoop]: Abstraction has 125085 states and 590563 transitions. [2021-06-06 00:44:05,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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) [2021-06-06 00:44:05,830 INFO L276 IsEmpty]: Start isEmpty. Operand 125085 states and 590563 transitions. [2021-06-06 00:44:06,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:44:06,109 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:44:06,109 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:44:06,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-06-06 00:44:06,109 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:44:06,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:44:06,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1521801712, now seen corresponding path program 8 times [2021-06-06 00:44:06,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:44:06,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736451286] [2021-06-06 00:44:06,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:44:06,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:44:06,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:44:06,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:44:06,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736451286] [2021-06-06 00:44:06,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736451286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:44:06,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418430195] [2021-06-06 00:44:06,128 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-06 00:44:06,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:44:06,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:44:06,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-06 00:44:06,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:44:06,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:44:06,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418430195] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:44:06,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-06 00:44:06,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-06-06 00:44:06,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472949235] [2021-06-06 00:44:06,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-06 00:44:06,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:44:06,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-06 00:44:06,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:44:06,189 INFO L87 Difference]: Start difference. First operand 125085 states and 590563 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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) [2021-06-06 00:44:07,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:44:07,557 INFO L93 Difference]: Finished difference Result 130126 states and 607352 transitions. [2021-06-06 00:44:07,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:44:07,558 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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 25 [2021-06-06 00:44:07,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:44:08,005 INFO L225 Difference]: With dead ends: 130126 [2021-06-06 00:44:08,006 INFO L226 Difference]: Without dead ends: 127575 [2021-06-06 00:44:08,006 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:44:08,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127575 states. [2021-06-06 00:44:09,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127575 to 87700. [2021-06-06 00:44:10,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87700 states, 87699 states have (on average 4.690794649881982) internal successors, (411378), 87699 states have internal predecessors, (411378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:44:10,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87700 states to 87700 states and 411378 transitions. [2021-06-06 00:44:10,698 INFO L78 Accepts]: Start accepts. Automaton has 87700 states and 411378 transitions. Word has length 25 [2021-06-06 00:44:10,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:44:10,698 INFO L482 AbstractCegarLoop]: Abstraction has 87700 states and 411378 transitions. [2021-06-06 00:44:10,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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) [2021-06-06 00:44:10,699 INFO L276 IsEmpty]: Start isEmpty. Operand 87700 states and 411378 transitions. [2021-06-06 00:44:10,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:44:10,884 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:44:10,884 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:44:11,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-06-06 00:44:11,093 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:44:11,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:44:11,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1193216718, now seen corresponding path program 9 times [2021-06-06 00:44:11,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:44:11,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956569602] [2021-06-06 00:44:11,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:44:11,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:44:11,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:44:11,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:44:11,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956569602] [2021-06-06 00:44:11,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956569602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:44:11,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413120184] [2021-06-06 00:44:11,133 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 [2021-06-06 00:44:11,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:44:11,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:44:11,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:44:11,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:44:11,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:44:11,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413120184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:44:11,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:44:11,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:44:11,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470455858] [2021-06-06 00:44:11,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:44:11,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:44:11,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:44:11,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:44:11,193 INFO L87 Difference]: Start difference. First operand 87700 states and 411378 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:44:12,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:44:12,190 INFO L93 Difference]: Finished difference Result 89555 states and 418507 transitions. [2021-06-06 00:44:12,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:44:12,190 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-06-06 00:44:12,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:44:12,497 INFO L225 Difference]: With dead ends: 89555 [2021-06-06 00:44:12,498 INFO L226 Difference]: Without dead ends: 89419 [2021-06-06 00:44:12,498 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:44:12,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89419 states. [2021-06-06 00:44:13,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89419 to 87693. [2021-06-06 00:44:14,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87693 states, 87692 states have (on average 4.691762076358162) internal successors, (411430), 87692 states have internal predecessors, (411430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:44:14,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87693 states to 87693 states and 411430 transitions. [2021-06-06 00:44:14,334 INFO L78 Accepts]: Start accepts. Automaton has 87693 states and 411430 transitions. Word has length 25 [2021-06-06 00:44:14,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:44:14,334 INFO L482 AbstractCegarLoop]: Abstraction has 87693 states and 411430 transitions. [2021-06-06 00:44:14,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:44:14,334 INFO L276 IsEmpty]: Start isEmpty. Operand 87693 states and 411430 transitions. [2021-06-06 00:44:14,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:44:14,522 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:44:14,522 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:44:14,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:44:14,723 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:44:14,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:44:14,723 INFO L82 PathProgramCache]: Analyzing trace with hash -648382774, now seen corresponding path program 10 times [2021-06-06 00:44:14,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:44:14,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814645819] [2021-06-06 00:44:14,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:44:14,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:44:14,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:44:14,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:44:14,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814645819] [2021-06-06 00:44:14,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814645819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:44:14,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038517379] [2021-06-06 00:44:14,773 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 [2021-06-06 00:44:14,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:44:14,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:44:14,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:44:14,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:44:14,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:44:14,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038517379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:44:14,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:44:14,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:44:14,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865604530] [2021-06-06 00:44:14,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:44:14,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:44:14,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:44:14,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:44:14,832 INFO L87 Difference]: Start difference. First operand 87693 states and 411430 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:44:15,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:44:15,886 INFO L93 Difference]: Finished difference Result 89703 states and 419257 transitions. [2021-06-06 00:44:15,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:44:15,887 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-06-06 00:44:15,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:44:16,178 INFO L225 Difference]: With dead ends: 89703 [2021-06-06 00:44:16,178 INFO L226 Difference]: Without dead ends: 89567 [2021-06-06 00:44:16,178 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:44:16,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89567 states. [2021-06-06 00:44:17,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89567 to 87714. [2021-06-06 00:44:17,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87714 states, 87713 states have (on average 4.692006886094422) internal successors, (411550), 87713 states have internal predecessors, (411550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:44:18,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87714 states to 87714 states and 411550 transitions. [2021-06-06 00:44:18,646 INFO L78 Accepts]: Start accepts. Automaton has 87714 states and 411550 transitions. Word has length 25 [2021-06-06 00:44:18,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:44:18,647 INFO L482 AbstractCegarLoop]: Abstraction has 87714 states and 411550 transitions. [2021-06-06 00:44:18,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:44:18,647 INFO L276 IsEmpty]: Start isEmpty. Operand 87714 states and 411550 transitions. [2021-06-06 00:44:18,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:44:18,834 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:44:18,834 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:44:19,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:44:19,045 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:44:19,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:44:19,045 INFO L82 PathProgramCache]: Analyzing trace with hash -961842550, now seen corresponding path program 11 times [2021-06-06 00:44:19,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:44:19,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499971755] [2021-06-06 00:44:19,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:44:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:44:19,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:44:19,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:44:19,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499971755] [2021-06-06 00:44:19,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499971755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:44:19,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703330069] [2021-06-06 00:44:19,103 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 [2021-06-06 00:44:19,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:44:19,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:44:19,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:44:19,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:44:19,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:44:19,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703330069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:44:19,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:44:19,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:44:19,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081396330] [2021-06-06 00:44:19,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:44:19,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:44:19,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:44:19,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:44:19,166 INFO L87 Difference]: Start difference. First operand 87714 states and 411550 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:44:19,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:44:19,785 INFO L93 Difference]: Finished difference Result 89056 states and 416830 transitions. [2021-06-06 00:44:19,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:44:19,786 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-06-06 00:44:19,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:44:20,515 INFO L225 Difference]: With dead ends: 89056 [2021-06-06 00:44:20,516 INFO L226 Difference]: Without dead ends: 88940 [2021-06-06 00:44:20,516 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:44:20,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88940 states. [2021-06-06 00:44:21,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88940 to 87736. [2021-06-06 00:44:22,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87736 states, 87735 states have (on average 4.692141106741893) internal successors, (411665), 87735 states have internal predecessors, (411665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:44:22,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87736 states to 87736 states and 411665 transitions. [2021-06-06 00:44:22,347 INFO L78 Accepts]: Start accepts. Automaton has 87736 states and 411665 transitions. Word has length 25 [2021-06-06 00:44:22,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:44:22,347 INFO L482 AbstractCegarLoop]: Abstraction has 87736 states and 411665 transitions. [2021-06-06 00:44:22,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:44:22,347 INFO L276 IsEmpty]: Start isEmpty. Operand 87736 states and 411665 transitions. [2021-06-06 00:44:22,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:44:22,540 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:44:22,540 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:44:22,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-06 00:44:22,741 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:44:22,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:44:22,741 INFO L82 PathProgramCache]: Analyzing trace with hash 394898822, now seen corresponding path program 12 times [2021-06-06 00:44:22,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:44:22,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646674410] [2021-06-06 00:44:22,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:44:22,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:44:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:44:22,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:44:22,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646674410] [2021-06-06 00:44:22,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646674410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:44:22,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298572337] [2021-06-06 00:44:22,799 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 [2021-06-06 00:44:22,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:44:22,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:44:22,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:44:22,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:44:22,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:44:22,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298572337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:44:22,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:44:22,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:44:22,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200329023] [2021-06-06 00:44:22,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:44:22,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:44:22,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:44:22,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:44:22,881 INFO L87 Difference]: Start difference. First operand 87736 states and 411665 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:44:23,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:44:23,931 INFO L93 Difference]: Finished difference Result 88944 states and 416367 transitions. [2021-06-06 00:44:23,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:44:23,931 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-06-06 00:44:23,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:44:24,221 INFO L225 Difference]: With dead ends: 88944 [2021-06-06 00:44:24,221 INFO L226 Difference]: Without dead ends: 88848 [2021-06-06 00:44:24,221 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:44:24,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88848 states. [2021-06-06 00:44:25,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88848 to 87758. [2021-06-06 00:44:25,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87758 states, 87757 states have (on average 4.692412001321832) internal successors, (411792), 87757 states have internal predecessors, (411792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:44:26,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87758 states to 87758 states and 411792 transitions. [2021-06-06 00:44:26,647 INFO L78 Accepts]: Start accepts. Automaton has 87758 states and 411792 transitions. Word has length 25 [2021-06-06 00:44:26,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:44:26,647 INFO L482 AbstractCegarLoop]: Abstraction has 87758 states and 411792 transitions. [2021-06-06 00:44:26,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:44:26,647 INFO L276 IsEmpty]: Start isEmpty. Operand 87758 states and 411792 transitions. [2021-06-06 00:44:26,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:44:26,831 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:44:26,831 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:44:27,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-06 00:44:27,032 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:44:27,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:44:27,032 INFO L82 PathProgramCache]: Analyzing trace with hash 267220118, now seen corresponding path program 13 times [2021-06-06 00:44:27,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:44:27,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33020149] [2021-06-06 00:44:27,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:44:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:44:27,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:44:27,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:44:27,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33020149] [2021-06-06 00:44:27,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33020149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:44:27,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336870806] [2021-06-06 00:44:27,093 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 [2021-06-06 00:44:27,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:44:27,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:44:27,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:44:27,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:44:27,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336870806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:44:27,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:44:27,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:44:27,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809876342] [2021-06-06 00:44:27,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:44:27,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:44:27,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:44:27,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:44:27,152 INFO L87 Difference]: Start difference. First operand 87758 states and 411792 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:44:27,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:44:27,777 INFO L93 Difference]: Finished difference Result 90259 states and 421196 transitions. [2021-06-06 00:44:27,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:44:27,777 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-06-06 00:44:27,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:44:28,545 INFO L225 Difference]: With dead ends: 90259 [2021-06-06 00:44:28,546 INFO L226 Difference]: Without dead ends: 90123 [2021-06-06 00:44:28,546 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:44:28,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90123 states. [2021-06-06 00:44:29,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90123 to 87809. [2021-06-06 00:44:30,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87809 states, 87808 states have (on average 4.692852587463557) internal successors, (412070), 87808 states have internal predecessors, (412070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:44:30,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87809 states to 87809 states and 412070 transitions. [2021-06-06 00:44:30,376 INFO L78 Accepts]: Start accepts. Automaton has 87809 states and 412070 transitions. Word has length 25 [2021-06-06 00:44:30,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:44:30,376 INFO L482 AbstractCegarLoop]: Abstraction has 87809 states and 412070 transitions. [2021-06-06 00:44:30,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:44:30,376 INFO L276 IsEmpty]: Start isEmpty. Operand 87809 states and 412070 transitions. [2021-06-06 00:44:30,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:44:30,564 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:44:30,564 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:44:30,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-06 00:44:30,766 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:44:30,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:44:30,767 INFO L82 PathProgramCache]: Analyzing trace with hash -46239658, now seen corresponding path program 14 times [2021-06-06 00:44:30,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:44:30,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071558975] [2021-06-06 00:44:30,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:44:30,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:44:30,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:44:30,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:44:30,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071558975] [2021-06-06 00:44:30,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071558975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:44:30,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736378610] [2021-06-06 00:44:30,834 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 [2021-06-06 00:44:30,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:44:30,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:44:30,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:44:30,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:44:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:44:30,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736378610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:44:30,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:44:30,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:44:30,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383681869] [2021-06-06 00:44:30,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:44:30,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:44:30,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:44:30,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:44:30,893 INFO L87 Difference]: Start difference. First operand 87809 states and 412070 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:44:31,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:44:31,870 INFO L93 Difference]: Finished difference Result 89754 states and 419470 transitions. [2021-06-06 00:44:31,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:44:31,871 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-06-06 00:44:31,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:44:32,149 INFO L225 Difference]: With dead ends: 89754 [2021-06-06 00:44:32,149 INFO L226 Difference]: Without dead ends: 89638 [2021-06-06 00:44:32,149 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:44:32,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89638 states. [2021-06-06 00:44:33,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89638 to 87839. [2021-06-06 00:44:33,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87839 states, 87838 states have (on average 4.693196566406339) internal successors, (412241), 87838 states have internal predecessors, (412241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:44:34,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87839 states to 87839 states and 412241 transitions. [2021-06-06 00:44:34,516 INFO L78 Accepts]: Start accepts. Automaton has 87839 states and 412241 transitions. Word has length 25 [2021-06-06 00:44:34,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:44:34,516 INFO L482 AbstractCegarLoop]: Abstraction has 87839 states and 412241 transitions. [2021-06-06 00:44:34,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:44:34,516 INFO L276 IsEmpty]: Start isEmpty. Operand 87839 states and 412241 transitions. [2021-06-06 00:44:34,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:44:34,707 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:44:34,707 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:44:34,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-06 00:44:34,908 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:44:34,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:44:34,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1310501714, now seen corresponding path program 15 times [2021-06-06 00:44:34,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:44:34,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211815839] [2021-06-06 00:44:34,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:44:34,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:44:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:44:34,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:44:34,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211815839] [2021-06-06 00:44:34,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211815839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:44:34,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219545441] [2021-06-06 00:44:34,980 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 [2021-06-06 00:44:35,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:44:35,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:44:35,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:44:35,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:44:35,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:44:35,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219545441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:44:35,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:44:35,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:44:35,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306284945] [2021-06-06 00:44:35,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:44:35,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:44:35,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:44:35,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:44:35,040 INFO L87 Difference]: Start difference. First operand 87839 states and 412241 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:44:35,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:44:35,643 INFO L93 Difference]: Finished difference Result 89966 states and 420506 transitions. [2021-06-06 00:44:35,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:44:35,643 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-06-06 00:44:35,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:44:36,353 INFO L225 Difference]: With dead ends: 89966 [2021-06-06 00:44:36,353 INFO L226 Difference]: Without dead ends: 89870 [2021-06-06 00:44:36,353 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:44:36,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89870 states. [2021-06-06 00:44:37,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89870 to 87873. [2021-06-06 00:44:37,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87873 states, 87872 states have (on average 4.6936453022578295) internal successors, (412440), 87872 states have internal predecessors, (412440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:44:38,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87873 states to 87873 states and 412440 transitions. [2021-06-06 00:44:38,220 INFO L78 Accepts]: Start accepts. Automaton has 87873 states and 412440 transitions. Word has length 25 [2021-06-06 00:44:38,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:44:38,220 INFO L482 AbstractCegarLoop]: Abstraction has 87873 states and 412440 transitions. [2021-06-06 00:44:38,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:44:38,220 INFO L276 IsEmpty]: Start isEmpty. Operand 87873 states and 412440 transitions. [2021-06-06 00:44:38,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:44:38,410 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:44:38,410 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:44:38,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-06 00:44:38,611 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:44:38,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:44:38,611 INFO L82 PathProgramCache]: Analyzing trace with hash 517783156, now seen corresponding path program 9 times [2021-06-06 00:44:38,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:44:38,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723093576] [2021-06-06 00:44:38,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:44:38,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:44:38,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:44:38,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:44:38,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723093576] [2021-06-06 00:44:38,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723093576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:44:38,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052718466] [2021-06-06 00:44:38,638 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 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 [2021-06-06 00:44:38,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:44:38,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:44:38,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-06 00:44:38,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:44:38,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:44:38,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052718466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:44:38,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:44:38,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-06 00:44:38,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000543271] [2021-06-06 00:44:38,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:44:38,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:44:38,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:44:38,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:44:38,712 INFO L87 Difference]: Start difference. First operand 87873 states and 412440 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-06-06 00:44:39,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:44:39,755 INFO L93 Difference]: Finished difference Result 97671 states and 457254 transitions. [2021-06-06 00:44:39,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:44:39,756 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 25 [2021-06-06 00:44:39,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:44:40,070 INFO L225 Difference]: With dead ends: 97671 [2021-06-06 00:44:40,071 INFO L226 Difference]: Without dead ends: 97564 [2021-06-06 00:44:40,071 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:44:40,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97564 states. [2021-06-06 00:44:42,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97564 to 96045. [2021-06-06 00:44:42,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96045 states, 96044 states have (on average 4.702969472325185) internal successors, (451692), 96044 states have internal predecessors, (451692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:44:42,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96045 states to 96045 states and 451692 transitions. [2021-06-06 00:44:42,785 INFO L78 Accepts]: Start accepts. Automaton has 96045 states and 451692 transitions. Word has length 25 [2021-06-06 00:44:42,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:44:42,785 INFO L482 AbstractCegarLoop]: Abstraction has 96045 states and 451692 transitions. [2021-06-06 00:44:42,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-06-06 00:44:42,785 INFO L276 IsEmpty]: Start isEmpty. Operand 96045 states and 451692 transitions. [2021-06-06 00:44:42,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:44:42,987 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:44:42,987 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:44:43,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:44:43,188 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:44:43,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:44:43,188 INFO L82 PathProgramCache]: Analyzing trace with hash -857833266, now seen corresponding path program 16 times [2021-06-06 00:44:43,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:44:43,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422086661] [2021-06-06 00:44:43,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:44:43,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:44:43,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:44:43,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:44:43,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422086661] [2021-06-06 00:44:43,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422086661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:44:43,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951532249] [2021-06-06 00:44:43,253 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 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 [2021-06-06 00:44:43,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:44:43,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:44:43,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:44:43,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:44:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:44:43,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951532249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:44:43,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:44:43,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:44:43,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504513101] [2021-06-06 00:44:43,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:44:43,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:44:43,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:44:43,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:44:43,313 INFO L87 Difference]: Start difference. First operand 96045 states and 451692 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:44:44,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:44:44,347 INFO L93 Difference]: Finished difference Result 97830 states and 458461 transitions. [2021-06-06 00:44:44,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:44:44,347 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-06-06 00:44:44,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:44:44,672 INFO L225 Difference]: With dead ends: 97830 [2021-06-06 00:44:44,672 INFO L226 Difference]: Without dead ends: 97714 [2021-06-06 00:44:44,673 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:44:44,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97714 states. [2021-06-06 00:44:46,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97714 to 96069. [2021-06-06 00:44:46,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96069 states, 96068 states have (on average 4.703106133155681) internal successors, (451818), 96068 states have internal predecessors, (451818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:44:47,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96069 states to 96069 states and 451818 transitions. [2021-06-06 00:44:47,234 INFO L78 Accepts]: Start accepts. Automaton has 96069 states and 451818 transitions. Word has length 25 [2021-06-06 00:44:47,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:44:47,234 INFO L482 AbstractCegarLoop]: Abstraction has 96069 states and 451818 transitions. [2021-06-06 00:44:47,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:44:47,234 INFO L276 IsEmpty]: Start isEmpty. Operand 96069 states and 451818 transitions. [2021-06-06 00:44:47,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:44:47,447 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:44:47,447 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:44:47,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-06 00:44:47,648 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:44:47,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:44:47,648 INFO L82 PathProgramCache]: Analyzing trace with hash 498908106, now seen corresponding path program 17 times [2021-06-06 00:44:47,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:44:47,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947196115] [2021-06-06 00:44:47,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:44:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:44:47,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:44:47,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:44:47,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947196115] [2021-06-06 00:44:47,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947196115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:44:47,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29479595] [2021-06-06 00:44:47,709 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 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 [2021-06-06 00:44:47,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:44:47,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:44:47,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:44:47,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:44:47,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:44:47,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29479595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:44:47,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:44:47,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:44:47,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648218246] [2021-06-06 00:44:47,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:44:47,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:44:47,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:44:47,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:44:47,768 INFO L87 Difference]: Start difference. First operand 96069 states and 451818 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:44:48,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:44:48,386 INFO L93 Difference]: Finished difference Result 98062 states and 459589 transitions. [2021-06-06 00:44:48,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:44:48,386 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-06-06 00:44:48,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:44:49,156 INFO L225 Difference]: With dead ends: 98062 [2021-06-06 00:44:49,156 INFO L226 Difference]: Without dead ends: 97966 [2021-06-06 00:44:49,156 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:44:49,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97966 states. [2021-06-06 00:44:50,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97966 to 96093. [2021-06-06 00:44:50,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96093 states, 96092 states have (on average 4.7034716729800605) internal successors, (451966), 96092 states have internal predecessors, (451966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:44:51,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96093 states to 96093 states and 451966 transitions. [2021-06-06 00:44:51,164 INFO L78 Accepts]: Start accepts. Automaton has 96093 states and 451966 transitions. Word has length 25 [2021-06-06 00:44:51,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:44:51,164 INFO L482 AbstractCegarLoop]: Abstraction has 96093 states and 451966 transitions. [2021-06-06 00:44:51,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:44:51,164 INFO L276 IsEmpty]: Start isEmpty. Operand 96093 states and 451966 transitions. [2021-06-06 00:44:51,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:44:51,372 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:44:51,372 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:44:51,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:44:51,573 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:44:51,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:44:51,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1202930538, now seen corresponding path program 18 times [2021-06-06 00:44:51,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:44:51,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757780072] [2021-06-06 00:44:51,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:44:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:44:51,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:44:51,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:44:51,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757780072] [2021-06-06 00:44:51,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757780072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:44:51,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087789605] [2021-06-06 00:44:51,621 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-06 00:44:52,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:44:52,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:44:52,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:44:52,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:44:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:44:52,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087789605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:44:52,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:44:52,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:44:52,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976058891] [2021-06-06 00:44:52,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:44:52,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:44:52,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:44:52,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:44:52,126 INFO L87 Difference]: Start difference. First operand 96093 states and 451966 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:44:52,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:44:52,813 INFO L93 Difference]: Finished difference Result 98621 states and 461688 transitions. [2021-06-06 00:44:52,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:44:52,814 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-06-06 00:44:52,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:44:53,150 INFO L225 Difference]: With dead ends: 98621 [2021-06-06 00:44:53,150 INFO L226 Difference]: Without dead ends: 98525 [2021-06-06 00:44:53,151 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:44:53,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98525 states. [2021-06-06 00:44:55,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98525 to 96141. [2021-06-06 00:44:55,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96141 states, 96140 states have (on average 4.70395256916996) internal successors, (452238), 96140 states have internal predecessors, (452238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:44:55,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96141 states to 96141 states and 452238 transitions. [2021-06-06 00:44:55,771 INFO L78 Accepts]: Start accepts. Automaton has 96141 states and 452238 transitions. Word has length 25 [2021-06-06 00:44:55,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:44:55,771 INFO L482 AbstractCegarLoop]: Abstraction has 96141 states and 452238 transitions. [2021-06-06 00:44:55,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:44:55,772 INFO L276 IsEmpty]: Start isEmpty. Operand 96141 states and 452238 transitions. [2021-06-06 00:44:55,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:44:55,979 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:44:55,979 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:44:56,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:44:56,180 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:44:56,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:44:56,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1894658838, now seen corresponding path program 10 times [2021-06-06 00:44:56,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:44:56,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307349158] [2021-06-06 00:44:56,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:44:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:44:56,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:44:56,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:44:56,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307349158] [2021-06-06 00:44:56,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307349158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:44:56,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324431502] [2021-06-06 00:44:56,199 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 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 [2021-06-06 00:44:56,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:44:56,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:44:56,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:44:56,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:44:56,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:44:56,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324431502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:44:56,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:44:56,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-06 00:44:56,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932405078] [2021-06-06 00:44:56,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:44:56,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:44:56,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:44:56,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:44:56,278 INFO L87 Difference]: Start difference. First operand 96141 states and 452238 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-06-06 00:44:57,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:44:57,536 INFO L93 Difference]: Finished difference Result 107267 states and 496764 transitions. [2021-06-06 00:44:57,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:44:57,537 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 25 [2021-06-06 00:44:57,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:44:57,899 INFO L225 Difference]: With dead ends: 107267 [2021-06-06 00:44:57,899 INFO L226 Difference]: Without dead ends: 107165 [2021-06-06 00:44:57,899 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:44:58,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107165 states. [2021-06-06 00:45:00,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107165 to 96163. [2021-06-06 00:45:00,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96163 states, 96162 states have (on average 4.703042781972089) internal successors, (452254), 96162 states have internal predecessors, (452254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:45:00,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96163 states to 96163 states and 452254 transitions. [2021-06-06 00:45:00,492 INFO L78 Accepts]: Start accepts. Automaton has 96163 states and 452254 transitions. Word has length 25 [2021-06-06 00:45:00,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:45:00,492 INFO L482 AbstractCegarLoop]: Abstraction has 96163 states and 452254 transitions. [2021-06-06 00:45:00,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-06-06 00:45:00,492 INFO L276 IsEmpty]: Start isEmpty. Operand 96163 states and 452254 transitions. [2021-06-06 00:45:00,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:45:00,709 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:45:00,709 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:45:00,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:45:00,911 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:45:00,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:45:00,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1370737230, now seen corresponding path program 11 times [2021-06-06 00:45:00,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:45:00,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284359815] [2021-06-06 00:45:00,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:45:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:45:00,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:45:00,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:45:00,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284359815] [2021-06-06 00:45:00,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284359815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:45:00,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744121336] [2021-06-06 00:45:00,930 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 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 [2021-06-06 00:45:00,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:45:00,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:45:00,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:45:00,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:45:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:45:01,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744121336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:45:01,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:45:01,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-06 00:45:01,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634514617] [2021-06-06 00:45:01,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:45:01,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:45:01,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:45:01,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:45:01,007 INFO L87 Difference]: Start difference. First operand 96163 states and 452254 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:45:02,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:45:02,144 INFO L93 Difference]: Finished difference Result 105665 states and 492345 transitions. [2021-06-06 00:45:02,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-06 00:45:02,144 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:45:02,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:45:02,541 INFO L225 Difference]: With dead ends: 105665 [2021-06-06 00:45:02,542 INFO L226 Difference]: Without dead ends: 105515 [2021-06-06 00:45:02,542 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:45:02,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105515 states. [2021-06-06 00:45:04,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105515 to 100600. [2021-06-06 00:45:04,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100600 states, 100599 states have (on average 4.695384645970636) internal successors, (472351), 100599 states have internal predecessors, (472351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:45:05,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100600 states to 100600 states and 472351 transitions. [2021-06-06 00:45:05,316 INFO L78 Accepts]: Start accepts. Automaton has 100600 states and 472351 transitions. Word has length 25 [2021-06-06 00:45:05,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:45:05,316 INFO L482 AbstractCegarLoop]: Abstraction has 100600 states and 472351 transitions. [2021-06-06 00:45:05,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:45:05,316 INFO L276 IsEmpty]: Start isEmpty. Operand 100600 states and 472351 transitions. [2021-06-06 00:45:05,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:45:05,542 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:45:05,542 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:45:05,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:45:05,754 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:45:05,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:45:05,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1318988372, now seen corresponding path program 12 times [2021-06-06 00:45:05,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:45:05,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273414734] [2021-06-06 00:45:05,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:45:05,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:45:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:45:05,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:45:05,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273414734] [2021-06-06 00:45:05,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273414734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:45:05,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275023732] [2021-06-06 00:45:05,776 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 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 [2021-06-06 00:45:05,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:45:05,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:45:05,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:45:05,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:45:05,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:45:05,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275023732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:45:05,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:45:05,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-06 00:45:05,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282271566] [2021-06-06 00:45:05,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:45:05,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:45:05,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:45:05,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:45:05,881 INFO L87 Difference]: Start difference. First operand 100600 states and 472351 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:45:06,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:45:06,951 INFO L93 Difference]: Finished difference Result 103952 states and 485481 transitions. [2021-06-06 00:45:06,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:45:06,951 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:45:06,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:45:07,336 INFO L225 Difference]: With dead ends: 103952 [2021-06-06 00:45:07,337 INFO L226 Difference]: Without dead ends: 103908 [2021-06-06 00:45:07,337 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:45:07,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103908 states. [2021-06-06 00:45:09,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103908 to 100692. [2021-06-06 00:45:09,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100692 states, 100691 states have (on average 4.694391752986861) internal successors, (472683), 100691 states have internal predecessors, (472683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:45:10,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100692 states to 100692 states and 472683 transitions. [2021-06-06 00:45:10,063 INFO L78 Accepts]: Start accepts. Automaton has 100692 states and 472683 transitions. Word has length 25 [2021-06-06 00:45:10,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:45:10,063 INFO L482 AbstractCegarLoop]: Abstraction has 100692 states and 472683 transitions. [2021-06-06 00:45:10,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:45:10,063 INFO L276 IsEmpty]: Start isEmpty. Operand 100692 states and 472683 transitions. [2021-06-06 00:45:10,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:45:10,271 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:45:10,271 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:45:10,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:45:10,472 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:45:10,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:45:10,473 INFO L82 PathProgramCache]: Analyzing trace with hash 812194570, now seen corresponding path program 13 times [2021-06-06 00:45:10,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:45:10,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115346984] [2021-06-06 00:45:10,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:45:10,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:45:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:45:10,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:45:10,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115346984] [2021-06-06 00:45:10,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115346984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:45:10,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762323388] [2021-06-06 00:45:10,512 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 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 [2021-06-06 00:45:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:45:10,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:45:10,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:45:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:45:10,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762323388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:45:10,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:45:10,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-06 00:45:10,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227741370] [2021-06-06 00:45:10,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:45:10,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:45:10,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:45:10,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:45:10,605 INFO L87 Difference]: Start difference. First operand 100692 states and 472683 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-06-06 00:45:11,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:45:11,828 INFO L93 Difference]: Finished difference Result 122378 states and 564861 transitions. [2021-06-06 00:45:11,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:45:11,828 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 25 [2021-06-06 00:45:11,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:45:12,268 INFO L225 Difference]: With dead ends: 122378 [2021-06-06 00:45:12,268 INFO L226 Difference]: Without dead ends: 120769 [2021-06-06 00:45:12,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:45:12,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120769 states. [2021-06-06 00:45:14,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120769 to 103273. [2021-06-06 00:45:14,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103273 states, 103272 states have (on average 4.6974688202029595) internal successors, (485117), 103272 states have internal predecessors, (485117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:45:15,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103273 states to 103273 states and 485117 transitions. [2021-06-06 00:45:15,091 INFO L78 Accepts]: Start accepts. Automaton has 103273 states and 485117 transitions. Word has length 25 [2021-06-06 00:45:15,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:45:15,092 INFO L482 AbstractCegarLoop]: Abstraction has 103273 states and 485117 transitions. [2021-06-06 00:45:15,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-06-06 00:45:15,092 INFO L276 IsEmpty]: Start isEmpty. Operand 103273 states and 485117 transitions. [2021-06-06 00:45:15,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:45:15,334 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:45:15,334 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:45:15,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-06 00:45:15,534 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:45:15,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:45:15,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1682717532, now seen corresponding path program 14 times [2021-06-06 00:45:15,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:45:15,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893668548] [2021-06-06 00:45:15,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:45:15,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:45:15,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:45:15,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:45:15,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893668548] [2021-06-06 00:45:15,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893668548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:45:15,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561896335] [2021-06-06 00:45:15,586 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-06 00:45:15,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:45:15,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:45:15,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:45:15,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:45:15,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:45:15,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561896335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:45:15,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:45:15,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-06 00:45:15,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169069553] [2021-06-06 00:45:15,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:45:15,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:45:15,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:45:15,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:45:15,681 INFO L87 Difference]: Start difference. First operand 103273 states and 485117 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-06-06 00:45:16,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:45:16,840 INFO L93 Difference]: Finished difference Result 106739 states and 498675 transitions. [2021-06-06 00:45:16,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-06 00:45:16,840 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 25 [2021-06-06 00:45:16,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:45:17,213 INFO L225 Difference]: With dead ends: 106739 [2021-06-06 00:45:17,214 INFO L226 Difference]: Without dead ends: 106655 [2021-06-06 00:45:17,214 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:45:17,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106655 states. [2021-06-06 00:45:19,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106655 to 103317. [2021-06-06 00:45:19,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103317 states, 103316 states have (on average 4.696697510550157) internal successors, (485244), 103316 states have internal predecessors, (485244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:45:19,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103317 states to 103317 states and 485244 transitions. [2021-06-06 00:45:19,948 INFO L78 Accepts]: Start accepts. Automaton has 103317 states and 485244 transitions. Word has length 25 [2021-06-06 00:45:19,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:45:19,948 INFO L482 AbstractCegarLoop]: Abstraction has 103317 states and 485244 transitions. [2021-06-06 00:45:19,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-06-06 00:45:19,949 INFO L276 IsEmpty]: Start isEmpty. Operand 103317 states and 485244 transitions. [2021-06-06 00:45:20,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:45:20,177 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:45:20,177 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:45:20,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-06 00:45:20,377 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:45:20,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:45:20,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1176441750, now seen corresponding path program 7 times [2021-06-06 00:45:20,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:45:20,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325221957] [2021-06-06 00:45:20,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:45:20,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:45:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:45:20,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:45:20,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325221957] [2021-06-06 00:45:20,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325221957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:45:20,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334701892] [2021-06-06 00:45:20,435 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 [2021-06-06 00:45:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:45:20,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:45:20,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:45:20,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:45:20,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334701892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:45:20,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:45:20,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:45:20,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123075695] [2021-06-06 00:45:20,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:45:20,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:45:20,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:45:20,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:45:20,486 INFO L87 Difference]: Start difference. First operand 103317 states and 485244 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:45:21,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:45:21,618 INFO L93 Difference]: Finished difference Result 105638 states and 494245 transitions. [2021-06-06 00:45:21,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:45:21,619 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-06-06 00:45:21,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:45:22,009 INFO L225 Difference]: With dead ends: 105638 [2021-06-06 00:45:22,009 INFO L226 Difference]: Without dead ends: 105538 [2021-06-06 00:45:22,009 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:45:22,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105538 states. [2021-06-06 00:45:24,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105538 to 103392. [2021-06-06 00:45:24,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103392 states, 103391 states have (on average 4.696830478474916) internal successors, (485610), 103391 states have internal predecessors, (485610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:45:24,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103392 states to 103392 states and 485610 transitions. [2021-06-06 00:45:24,699 INFO L78 Accepts]: Start accepts. Automaton has 103392 states and 485610 transitions. Word has length 25 [2021-06-06 00:45:24,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:45:24,700 INFO L482 AbstractCegarLoop]: Abstraction has 103392 states and 485610 transitions. [2021-06-06 00:45:24,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:45:24,700 INFO L276 IsEmpty]: Start isEmpty. Operand 103392 states and 485610 transitions. [2021-06-06 00:45:24,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:45:24,940 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:45:24,940 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:45:25,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-06 00:45:25,145 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:45:25,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:45:25,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1470680270, now seen corresponding path program 8 times [2021-06-06 00:45:25,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:45:25,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265766725] [2021-06-06 00:45:25,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:45:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:45:25,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:45:25,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:45:25,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265766725] [2021-06-06 00:45:25,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265766725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:45:25,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119928711] [2021-06-06 00:45:25,199 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 [2021-06-06 00:45:25,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:45:25,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:45:25,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:45:25,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:45:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:45:25,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119928711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:45:25,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:45:25,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:45:25,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47375760] [2021-06-06 00:45:25,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:45:25,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:45:25,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:45:25,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:45:25,276 INFO L87 Difference]: Start difference. First operand 103392 states and 485610 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:45:26,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:45:26,383 INFO L93 Difference]: Finished difference Result 105993 states and 495944 transitions. [2021-06-06 00:45:26,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:45:26,384 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-06-06 00:45:26,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:45:26,774 INFO L225 Difference]: With dead ends: 105993 [2021-06-06 00:45:26,774 INFO L226 Difference]: Without dead ends: 105893 [2021-06-06 00:45:26,774 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:45:26,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105893 states. [2021-06-06 00:45:29,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105893 to 103439. [2021-06-06 00:45:29,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103439 states, 103438 states have (on average 4.69710357895551) internal successors, (485859), 103438 states have internal predecessors, (485859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:45:29,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103439 states to 103439 states and 485859 transitions. [2021-06-06 00:45:29,719 INFO L78 Accepts]: Start accepts. Automaton has 103439 states and 485859 transitions. Word has length 25 [2021-06-06 00:45:29,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:45:29,719 INFO L482 AbstractCegarLoop]: Abstraction has 103439 states and 485859 transitions. [2021-06-06 00:45:29,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:45:29,719 INFO L276 IsEmpty]: Start isEmpty. Operand 103439 states and 485859 transitions. [2021-06-06 00:45:29,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:45:29,978 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:45:29,979 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:45:30,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-06 00:45:30,179 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:45:30,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:45:30,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1996714358, now seen corresponding path program 9 times [2021-06-06 00:45:30,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:45:30,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41957381] [2021-06-06 00:45:30,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:45:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:45:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:45:30,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:45:30,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41957381] [2021-06-06 00:45:30,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41957381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:45:30,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347451888] [2021-06-06 00:45:30,243 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 [2021-06-06 00:45:30,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:45:30,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:45:30,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:45:30,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:45:30,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:45:30,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347451888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:45:30,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:45:30,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:45:30,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772306047] [2021-06-06 00:45:30,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:45:30,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:45:30,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:45:30,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:45:30,334 INFO L87 Difference]: Start difference. First operand 103439 states and 485859 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:45:31,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:45:31,517 INFO L93 Difference]: Finished difference Result 104315 states and 489264 transitions. [2021-06-06 00:45:31,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:45:31,517 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-06-06 00:45:31,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:45:31,885 INFO L225 Difference]: With dead ends: 104315 [2021-06-06 00:45:31,885 INFO L226 Difference]: Without dead ends: 104239 [2021-06-06 00:45:31,885 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:45:32,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104239 states. [2021-06-06 00:45:34,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104239 to 103480. [2021-06-06 00:45:34,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103480 states, 103479 states have (on average 4.696981996347085) internal successors, (486039), 103479 states have internal predecessors, (486039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:45:34,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103480 states to 103480 states and 486039 transitions. [2021-06-06 00:45:34,550 INFO L78 Accepts]: Start accepts. Automaton has 103480 states and 486039 transitions. Word has length 25 [2021-06-06 00:45:34,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:45:34,550 INFO L482 AbstractCegarLoop]: Abstraction has 103480 states and 486039 transitions. [2021-06-06 00:45:34,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:45:34,550 INFO L276 IsEmpty]: Start isEmpty. Operand 103480 states and 486039 transitions. [2021-06-06 00:45:34,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:45:34,768 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:45:34,768 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:45:34,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-06 00:45:34,969 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:45:34,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:45:34,969 INFO L82 PathProgramCache]: Analyzing trace with hash -247614478, now seen corresponding path program 10 times [2021-06-06 00:45:34,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:45:34,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848306311] [2021-06-06 00:45:34,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:45:34,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:45:35,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:45:35,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:45:35,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848306311] [2021-06-06 00:45:35,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848306311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:45:35,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754909183] [2021-06-06 00:45:35,021 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 [2021-06-06 00:45:35,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:45:35,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:45:35,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:45:35,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:45:35,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:45:35,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754909183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:45:35,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:45:35,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:45:35,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015558827] [2021-06-06 00:45:35,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:45:35,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:45:35,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:45:35,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:45:35,096 INFO L87 Difference]: Start difference. First operand 103480 states and 486039 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:45:36,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:45:36,204 INFO L93 Difference]: Finished difference Result 104856 states and 491459 transitions. [2021-06-06 00:45:36,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:45:36,205 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-06-06 00:45:36,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:45:36,574 INFO L225 Difference]: With dead ends: 104856 [2021-06-06 00:45:36,574 INFO L226 Difference]: Without dead ends: 104768 [2021-06-06 00:45:36,574 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:45:36,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104768 states. [2021-06-06 00:45:38,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104768 to 103498. [2021-06-06 00:45:38,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103498 states, 103497 states have (on average 4.697083007236925) internal successors, (486134), 103497 states have internal predecessors, (486134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:45:39,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103498 states to 103498 states and 486134 transitions. [2021-06-06 00:45:39,344 INFO L78 Accepts]: Start accepts. Automaton has 103498 states and 486134 transitions. Word has length 25 [2021-06-06 00:45:39,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:45:39,344 INFO L482 AbstractCegarLoop]: Abstraction has 103498 states and 486134 transitions. [2021-06-06 00:45:39,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:45:39,344 INFO L276 IsEmpty]: Start isEmpty. Operand 103498 states and 486134 transitions. [2021-06-06 00:45:39,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:45:39,556 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:45:39,556 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:45:39,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:45:39,757 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:45:39,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:45:39,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1683892410, now seen corresponding path program 11 times [2021-06-06 00:45:39,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:45:39,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436575599] [2021-06-06 00:45:39,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:45:39,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:45:39,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:45:39,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:45:39,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436575599] [2021-06-06 00:45:39,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436575599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:45:39,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517839720] [2021-06-06 00:45:39,797 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 [2021-06-06 00:45:39,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:45:39,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:45:39,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:45:39,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:45:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:45:39,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517839720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:45:39,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:45:39,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:45:39,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128967125] [2021-06-06 00:45:39,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:45:39,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:45:39,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:45:39,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:45:39,850 INFO L87 Difference]: Start difference. First operand 103498 states and 486134 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:45:40,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:45:40,903 INFO L93 Difference]: Finished difference Result 105284 states and 493087 transitions. [2021-06-06 00:45:40,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:45:40,904 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-06-06 00:45:40,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:45:41,300 INFO L225 Difference]: With dead ends: 105284 [2021-06-06 00:45:41,300 INFO L226 Difference]: Without dead ends: 105184 [2021-06-06 00:45:41,300 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:45:41,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105184 states. [2021-06-06 00:45:43,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105184 to 103515. [2021-06-06 00:45:43,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103515 states, 103514 states have (on average 4.69741291033097) internal successors, (486248), 103514 states have internal predecessors, (486248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:45:44,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103515 states to 103515 states and 486248 transitions. [2021-06-06 00:45:44,083 INFO L78 Accepts]: Start accepts. Automaton has 103515 states and 486248 transitions. Word has length 25 [2021-06-06 00:45:44,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:45:44,083 INFO L482 AbstractCegarLoop]: Abstraction has 103515 states and 486248 transitions. [2021-06-06 00:45:44,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:45:44,083 INFO L276 IsEmpty]: Start isEmpty. Operand 103515 states and 486248 transitions. [2021-06-06 00:45:44,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:45:44,316 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:45:44,316 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:45:44,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:45:44,517 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:45:44,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:45:44,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1492192234, now seen corresponding path program 18 times [2021-06-06 00:45:44,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:45:44,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848451405] [2021-06-06 00:45:44,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:45:44,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:45:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:45:44,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:45:44,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848451405] [2021-06-06 00:45:44,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848451405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:45:44,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861695963] [2021-06-06 00:45:44,538 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 [2021-06-06 00:45:44,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:45:44,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:45:44,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:45:44,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:45:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:45:44,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861695963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:45:44,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:45:44,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-06 00:45:44,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367340996] [2021-06-06 00:45:44,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:45:44,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:45:44,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:45:44,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:45:44,629 INFO L87 Difference]: Start difference. First operand 103515 states and 486248 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-06-06 00:45:45,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:45:45,839 INFO L93 Difference]: Finished difference Result 118688 states and 551898 transitions. [2021-06-06 00:45:45,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-06 00:45:45,840 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 25 [2021-06-06 00:45:45,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:45:46,274 INFO L225 Difference]: With dead ends: 118688 [2021-06-06 00:45:46,275 INFO L226 Difference]: Without dead ends: 118688 [2021-06-06 00:45:46,275 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:45:46,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118688 states. [2021-06-06 00:45:48,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118688 to 105619. [2021-06-06 00:45:48,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105619 states, 105618 states have (on average 4.697987085534662) internal successors, (496192), 105618 states have internal predecessors, (496192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:45:49,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105619 states to 105619 states and 496192 transitions. [2021-06-06 00:45:49,083 INFO L78 Accepts]: Start accepts. Automaton has 105619 states and 496192 transitions. Word has length 25 [2021-06-06 00:45:49,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:45:49,083 INFO L482 AbstractCegarLoop]: Abstraction has 105619 states and 496192 transitions. [2021-06-06 00:45:49,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-06-06 00:45:49,083 INFO L276 IsEmpty]: Start isEmpty. Operand 105619 states and 496192 transitions. [2021-06-06 00:45:49,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:45:49,308 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:45:49,309 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:45:49,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:45:49,509 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:45:49,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:45:49,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1850358678, now seen corresponding path program 12 times [2021-06-06 00:45:49,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:45:49,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055525081] [2021-06-06 00:45:49,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:45:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:45:49,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:45:49,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:45:49,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055525081] [2021-06-06 00:45:49,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055525081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:45:49,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675290564] [2021-06-06 00:45:49,552 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 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 [2021-06-06 00:45:49,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:45:49,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:45:49,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:45:49,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:45:49,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:45:49,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675290564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:45:49,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:45:49,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:45:49,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936866668] [2021-06-06 00:45:49,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:45:49,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:45:49,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:45:49,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:45:49,614 INFO L87 Difference]: Start difference. First operand 105619 states and 496192 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:45:50,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:45:50,742 INFO L93 Difference]: Finished difference Result 108208 states and 506403 transitions. [2021-06-06 00:45:50,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:45:50,742 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-06-06 00:45:50,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:45:51,140 INFO L225 Difference]: With dead ends: 108208 [2021-06-06 00:45:51,140 INFO L226 Difference]: Without dead ends: 108108 [2021-06-06 00:45:51,140 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:45:51,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108108 states. [2021-06-06 00:45:53,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108108 to 105643. [2021-06-06 00:45:53,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105643 states, 105642 states have (on average 4.698443800761061) internal successors, (496353), 105642 states have internal predecessors, (496353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:45:53,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105643 states to 105643 states and 496353 transitions. [2021-06-06 00:45:53,829 INFO L78 Accepts]: Start accepts. Automaton has 105643 states and 496353 transitions. Word has length 25 [2021-06-06 00:45:53,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:45:53,830 INFO L482 AbstractCegarLoop]: Abstraction has 105643 states and 496353 transitions. [2021-06-06 00:45:53,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:45:53,830 INFO L276 IsEmpty]: Start isEmpty. Operand 105643 states and 496353 transitions. [2021-06-06 00:45:54,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:45:54,054 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:45:54,054 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:45:54,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:45:54,254 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:45:54,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:45:54,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1617035950, now seen corresponding path program 13 times [2021-06-06 00:45:54,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:45:54,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620845244] [2021-06-06 00:45:54,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:45:54,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:45:54,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:45:54,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:45:54,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620845244] [2021-06-06 00:45:54,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620845244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:45:54,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928866479] [2021-06-06 00:45:54,307 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 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 [2021-06-06 00:45:54,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:45:54,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:45:54,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:45:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:45:54,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928866479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:45:54,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:45:54,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:45:54,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651843270] [2021-06-06 00:45:54,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:45:54,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:45:54,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:45:54,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:45:54,375 INFO L87 Difference]: Start difference. First operand 105643 states and 496353 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:45:55,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:45:55,449 INFO L93 Difference]: Finished difference Result 108139 states and 506170 transitions. [2021-06-06 00:45:55,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:45:55,449 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-06-06 00:45:55,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:45:55,830 INFO L225 Difference]: With dead ends: 108139 [2021-06-06 00:45:55,830 INFO L226 Difference]: Without dead ends: 108063 [2021-06-06 00:45:55,830 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:45:55,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108063 states. [2021-06-06 00:45:57,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108063 to 105670. [2021-06-06 00:45:58,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105670 states, 105669 states have (on average 4.69866280555319) internal successors, (496503), 105669 states have internal predecessors, (496503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:45:58,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105670 states to 105670 states and 496503 transitions. [2021-06-06 00:45:58,523 INFO L78 Accepts]: Start accepts. Automaton has 105670 states and 496503 transitions. Word has length 25 [2021-06-06 00:45:58,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:45:58,523 INFO L482 AbstractCegarLoop]: Abstraction has 105670 states and 496503 transitions. [2021-06-06 00:45:58,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:45:58,523 INFO L276 IsEmpty]: Start isEmpty. Operand 105670 states and 496503 transitions. [2021-06-06 00:45:58,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:45:58,753 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:45:58,753 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:45:58,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:45:58,954 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:45:58,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:45:58,954 INFO L82 PathProgramCache]: Analyzing trace with hash 132063930, now seen corresponding path program 14 times [2021-06-06 00:45:58,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:45:58,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11805565] [2021-06-06 00:45:58,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:45:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:45:59,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:45:59,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:45:59,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11805565] [2021-06-06 00:45:59,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11805565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:45:59,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931607055] [2021-06-06 00:45:59,014 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 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 [2021-06-06 00:45:59,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:45:59,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:45:59,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:45:59,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:45:59,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:45:59,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931607055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:45:59,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:45:59,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:45:59,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608279476] [2021-06-06 00:45:59,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:45:59,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:45:59,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:45:59,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:45:59,083 INFO L87 Difference]: Start difference. First operand 105670 states and 496503 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:46:00,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:46:00,175 INFO L93 Difference]: Finished difference Result 107419 states and 503279 transitions. [2021-06-06 00:46:00,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:46:00,175 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-06-06 00:46:00,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:46:00,552 INFO L225 Difference]: With dead ends: 107419 [2021-06-06 00:46:00,552 INFO L226 Difference]: Without dead ends: 107331 [2021-06-06 00:46:00,553 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:46:00,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107331 states. [2021-06-06 00:46:02,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107331 to 105677. [2021-06-06 00:46:02,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105677 states, 105676 states have (on average 4.698938264128089) internal successors, (496565), 105676 states have internal predecessors, (496565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:46:03,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105677 states to 105677 states and 496565 transitions. [2021-06-06 00:46:03,187 INFO L78 Accepts]: Start accepts. Automaton has 105677 states and 496565 transitions. Word has length 25 [2021-06-06 00:46:03,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:46:03,187 INFO L482 AbstractCegarLoop]: Abstraction has 105677 states and 496565 transitions. [2021-06-06 00:46:03,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:46:03,187 INFO L276 IsEmpty]: Start isEmpty. Operand 105677 states and 496565 transitions. [2021-06-06 00:46:03,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:46:03,414 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:46:03,414 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:46:03,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-06 00:46:03,615 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:46:03,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:46:03,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1826075754, now seen corresponding path program 15 times [2021-06-06 00:46:03,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:46:03,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054037301] [2021-06-06 00:46:03,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:46:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:46:03,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:46:03,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:46:03,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054037301] [2021-06-06 00:46:03,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054037301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:46:03,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986775806] [2021-06-06 00:46:03,665 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 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 [2021-06-06 00:46:03,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:46:03,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:46:03,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:46:03,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:46:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:46:03,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986775806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:46:03,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:46:03,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:46:03,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549497743] [2021-06-06 00:46:03,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:46:03,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:46:03,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:46:03,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:46:03,738 INFO L87 Difference]: Start difference. First operand 105677 states and 496565 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:46:04,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:46:04,799 INFO L93 Difference]: Finished difference Result 108226 states and 506520 transitions. [2021-06-06 00:46:04,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:46:04,799 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-06-06 00:46:04,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:46:05,173 INFO L225 Difference]: With dead ends: 108226 [2021-06-06 00:46:05,173 INFO L226 Difference]: Without dead ends: 108150 [2021-06-06 00:46:05,173 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:46:05,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108150 states. [2021-06-06 00:46:07,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108150 to 105719. [2021-06-06 00:46:07,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105719 states, 105718 states have (on average 4.699351103880134) internal successors, (496806), 105718 states have internal predecessors, (496806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:46:07,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105719 states to 105719 states and 496806 transitions. [2021-06-06 00:46:07,884 INFO L78 Accepts]: Start accepts. Automaton has 105719 states and 496806 transitions. Word has length 25 [2021-06-06 00:46:07,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:46:07,884 INFO L482 AbstractCegarLoop]: Abstraction has 105719 states and 496806 transitions. [2021-06-06 00:46:07,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:46:07,884 INFO L276 IsEmpty]: Start isEmpty. Operand 105719 states and 496806 transitions. [2021-06-06 00:46:08,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:46:08,119 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:46:08,119 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:46:08,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-06 00:46:08,320 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:46:08,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:46:08,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1125159402, now seen corresponding path program 16 times [2021-06-06 00:46:08,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:46:08,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458604209] [2021-06-06 00:46:08,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:46:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:46:08,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:46:08,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:46:08,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458604209] [2021-06-06 00:46:08,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458604209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:46:08,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759166791] [2021-06-06 00:46:08,384 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 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 [2021-06-06 00:46:08,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:46:08,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:46:08,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:46:08,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:46:08,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:46:08,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759166791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:46:08,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:46:08,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:46:08,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406717066] [2021-06-06 00:46:08,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:46:08,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:46:08,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:46:08,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:46:08,440 INFO L87 Difference]: Start difference. First operand 105719 states and 496806 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:46:09,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:46:09,577 INFO L93 Difference]: Finished difference Result 107874 states and 505312 transitions. [2021-06-06 00:46:09,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:46:09,577 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-06-06 00:46:09,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:46:09,963 INFO L225 Difference]: With dead ends: 107874 [2021-06-06 00:46:09,963 INFO L226 Difference]: Without dead ends: 107798 [2021-06-06 00:46:09,963 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:46:10,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107798 states. [2021-06-06 00:46:12,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107798 to 105741. [2021-06-06 00:46:12,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105741 states, 105740 states have (on average 4.69966899943257) internal successors, (496943), 105740 states have internal predecessors, (496943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:46:12,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105741 states to 105741 states and 496943 transitions. [2021-06-06 00:46:12,816 INFO L78 Accepts]: Start accepts. Automaton has 105741 states and 496943 transitions. Word has length 25 [2021-06-06 00:46:12,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:46:12,816 INFO L482 AbstractCegarLoop]: Abstraction has 105741 states and 496943 transitions. [2021-06-06 00:46:12,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:46:12,816 INFO L276 IsEmpty]: Start isEmpty. Operand 105741 states and 496943 transitions. [2021-06-06 00:46:13,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:46:13,053 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:46:13,053 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:46:13,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:46:13,269 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:46:13,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:46:13,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1420708014, now seen corresponding path program 17 times [2021-06-06 00:46:13,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:46:13,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679261496] [2021-06-06 00:46:13,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:46:13,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:46:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:46:13,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:46:13,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679261496] [2021-06-06 00:46:13,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679261496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:46:13,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026041664] [2021-06-06 00:46:13,331 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 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 [2021-06-06 00:46:13,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:46:13,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:46:13,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:46:13,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:46:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:46:13,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026041664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:46:13,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:46:13,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:46:13,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930010761] [2021-06-06 00:46:13,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:46:13,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:46:13,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:46:13,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:46:13,395 INFO L87 Difference]: Start difference. First operand 105741 states and 496943 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:46:14,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:46:14,525 INFO L93 Difference]: Finished difference Result 107237 states and 502736 transitions. [2021-06-06 00:46:14,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:46:14,526 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-06-06 00:46:14,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:46:14,897 INFO L225 Difference]: With dead ends: 107237 [2021-06-06 00:46:14,897 INFO L226 Difference]: Without dead ends: 107149 [2021-06-06 00:46:14,898 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:46:15,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107149 states. [2021-06-06 00:46:17,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107149 to 105752. [2021-06-06 00:46:17,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105752 states, 105751 states have (on average 4.699946099800474) internal successors, (497024), 105751 states have internal predecessors, (497024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:46:17,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105752 states to 105752 states and 497024 transitions. [2021-06-06 00:46:17,615 INFO L78 Accepts]: Start accepts. Automaton has 105752 states and 497024 transitions. Word has length 25 [2021-06-06 00:46:17,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:46:17,615 INFO L482 AbstractCegarLoop]: Abstraction has 105752 states and 497024 transitions. [2021-06-06 00:46:17,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:46:17,615 INFO L276 IsEmpty]: Start isEmpty. Operand 105752 states and 497024 transitions. [2021-06-06 00:46:17,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:46:17,841 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:46:17,841 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:46:18,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-06 00:46:18,041 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:46:18,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:46:18,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1658453014, now seen corresponding path program 19 times [2021-06-06 00:46:18,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:46:18,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069558316] [2021-06-06 00:46:18,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:46:18,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:46:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:46:18,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:46:18,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069558316] [2021-06-06 00:46:18,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069558316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:46:18,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333288394] [2021-06-06 00:46:18,072 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 [2021-06-06 00:46:18,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:46:18,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:46:18,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:46:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:46:18,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333288394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:46:18,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:46:18,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-06 00:46:18,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635341003] [2021-06-06 00:46:18,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:46:18,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:46:18,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:46:18,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:46:18,157 INFO L87 Difference]: Start difference. First operand 105752 states and 497024 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) [2021-06-06 00:46:19,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:46:19,522 INFO L93 Difference]: Finished difference Result 148546 states and 685984 transitions. [2021-06-06 00:46:19,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:46:19,523 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 25 [2021-06-06 00:46:19,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:46:20,457 INFO L225 Difference]: With dead ends: 148546 [2021-06-06 00:46:20,457 INFO L226 Difference]: Without dead ends: 147281 [2021-06-06 00:46:20,457 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:46:20,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147281 states. [2021-06-06 00:46:22,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147281 to 117058. [2021-06-06 00:46:22,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117058 states, 117057 states have (on average 4.7037169925762665) internal successors, (550603), 117057 states have internal predecessors, (550603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:46:23,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117058 states to 117058 states and 550603 transitions. [2021-06-06 00:46:23,661 INFO L78 Accepts]: Start accepts. Automaton has 117058 states and 550603 transitions. Word has length 25 [2021-06-06 00:46:23,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:46:23,662 INFO L482 AbstractCegarLoop]: Abstraction has 117058 states and 550603 transitions. [2021-06-06 00:46:23,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) [2021-06-06 00:46:23,662 INFO L276 IsEmpty]: Start isEmpty. Operand 117058 states and 550603 transitions. [2021-06-06 00:46:23,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:46:23,918 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:46:23,918 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:46:24,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:46:24,119 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:46:24,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:46:24,119 INFO L82 PathProgramCache]: Analyzing trace with hash 208727758, now seen corresponding path program 20 times [2021-06-06 00:46:24,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:46:24,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469260931] [2021-06-06 00:46:24,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:46:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:46:24,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:46:24,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:46:24,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469260931] [2021-06-06 00:46:24,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469260931] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:46:24,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:46:24,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-06 00:46:24,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222424486] [2021-06-06 00:46:24,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-06 00:46:24,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:46:24,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-06 00:46:24,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:46:24,138 INFO L87 Difference]: Start difference. First operand 117058 states and 550603 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2021-06-06 00:46:25,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:46:25,405 INFO L93 Difference]: Finished difference Result 128713 states and 600066 transitions. [2021-06-06 00:46:25,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:46:25,406 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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 25 [2021-06-06 00:46:25,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:46:25,853 INFO L225 Difference]: With dead ends: 128713 [2021-06-06 00:46:25,853 INFO L226 Difference]: Without dead ends: 128713 [2021-06-06 00:46:25,853 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:46:26,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128713 states. [2021-06-06 00:46:28,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128713 to 117168. [2021-06-06 00:46:28,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117168 states, 117167 states have (on average 4.7038500601705255) internal successors, (551136), 117167 states have internal predecessors, (551136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:46:28,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117168 states to 117168 states and 551136 transitions. [2021-06-06 00:46:28,818 INFO L78 Accepts]: Start accepts. Automaton has 117168 states and 551136 transitions. Word has length 25 [2021-06-06 00:46:28,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:46:28,819 INFO L482 AbstractCegarLoop]: Abstraction has 117168 states and 551136 transitions. [2021-06-06 00:46:28,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2021-06-06 00:46:28,819 INFO L276 IsEmpty]: Start isEmpty. Operand 117168 states and 551136 transitions. [2021-06-06 00:46:29,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:46:29,557 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:46:29,557 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:46:29,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2021-06-06 00:46:29,557 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:46:29,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:46:29,557 INFO L82 PathProgramCache]: Analyzing trace with hash 537875814, now seen corresponding path program 18 times [2021-06-06 00:46:29,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:46:29,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012059312] [2021-06-06 00:46:29,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:46:29,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:46:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:46:29,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:46:29,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012059312] [2021-06-06 00:46:29,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012059312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:46:29,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750440411] [2021-06-06 00:46:29,618 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 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 [2021-06-06 00:46:29,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:46:29,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:46:29,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:46:29,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:46:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:46:29,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750440411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:46:29,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:46:29,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:46:29,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054710882] [2021-06-06 00:46:29,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:46:29,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:46:29,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:46:29,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:46:29,699 INFO L87 Difference]: Start difference. First operand 117168 states and 551136 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:46:30,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:46:30,457 INFO L93 Difference]: Finished difference Result 119473 states and 560252 transitions. [2021-06-06 00:46:30,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:46:30,457 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-06-06 00:46:30,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:46:30,879 INFO L225 Difference]: With dead ends: 119473 [2021-06-06 00:46:30,879 INFO L226 Difference]: Without dead ends: 119373 [2021-06-06 00:46:30,879 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:46:31,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119373 states. [2021-06-06 00:46:33,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119373 to 117184. [2021-06-06 00:46:33,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117184 states, 117183 states have (on average 4.7040782366042855) internal successors, (551238), 117183 states have internal predecessors, (551238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:46:34,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117184 states to 117184 states and 551238 transitions. [2021-06-06 00:46:34,255 INFO L78 Accepts]: Start accepts. Automaton has 117184 states and 551238 transitions. Word has length 25 [2021-06-06 00:46:34,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:46:34,255 INFO L482 AbstractCegarLoop]: Abstraction has 117184 states and 551238 transitions. [2021-06-06 00:46:34,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:46:34,255 INFO L276 IsEmpty]: Start isEmpty. Operand 117184 states and 551238 transitions. [2021-06-06 00:46:34,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:46:34,552 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:46:34,552 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:46:34,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:46:34,753 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:46:34,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:46:34,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1365448482, now seen corresponding path program 19 times [2021-06-06 00:46:34,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:46:34,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567059780] [2021-06-06 00:46:34,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:46:34,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:46:34,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:46:34,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:46:34,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567059780] [2021-06-06 00:46:34,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567059780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:46:34,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307924898] [2021-06-06 00:46:34,807 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 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 [2021-06-06 00:46:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:46:34,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:46:34,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:46:34,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:46:34,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307924898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:46:34,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:46:34,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:46:34,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003633438] [2021-06-06 00:46:34,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:46:34,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:46:34,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:46:34,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:46:34,866 INFO L87 Difference]: Start difference. First operand 117184 states and 551238 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:46:35,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:46:36,180 INFO L93 Difference]: Finished difference Result 118219 states and 555230 transitions. [2021-06-06 00:46:36,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:46:36,181 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-06-06 00:46:36,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:46:36,655 INFO L225 Difference]: With dead ends: 118219 [2021-06-06 00:46:36,655 INFO L226 Difference]: Without dead ends: 118143 [2021-06-06 00:46:36,655 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:46:36,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118143 states. [2021-06-06 00:46:38,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118143 to 117194. [2021-06-06 00:46:38,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117194 states, 117193 states have (on average 4.7041034874096574) internal successors, (551288), 117193 states have internal predecessors, (551288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:46:39,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117194 states to 117194 states and 551288 transitions. [2021-06-06 00:46:39,706 INFO L78 Accepts]: Start accepts. Automaton has 117194 states and 551288 transitions. Word has length 25 [2021-06-06 00:46:39,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:46:39,706 INFO L482 AbstractCegarLoop]: Abstraction has 117194 states and 551288 transitions. [2021-06-06 00:46:39,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:46:39,706 INFO L276 IsEmpty]: Start isEmpty. Operand 117194 states and 551288 transitions. [2021-06-06 00:46:39,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:46:39,968 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:46:39,968 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:46:40,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-06-06 00:46:40,168 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:46:40,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:46:40,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1180418934, now seen corresponding path program 20 times [2021-06-06 00:46:40,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:46:40,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418195096] [2021-06-06 00:46:40,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:46:40,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:46:40,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:46:40,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:46:40,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418195096] [2021-06-06 00:46:40,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418195096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:46:40,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194820409] [2021-06-06 00:46:40,229 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 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 [2021-06-06 00:46:40,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:46:40,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:46:40,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:46:40,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:46:40,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:46:40,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194820409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:46:40,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:46:40,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:46:40,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174686234] [2021-06-06 00:46:40,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:46:40,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:46:40,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:46:40,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:46:40,295 INFO L87 Difference]: Start difference. First operand 117194 states and 551288 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:46:41,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:46:41,500 INFO L93 Difference]: Finished difference Result 118548 states and 556592 transitions. [2021-06-06 00:46:41,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:46:41,500 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-06-06 00:46:41,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:46:41,926 INFO L225 Difference]: With dead ends: 118548 [2021-06-06 00:46:41,926 INFO L226 Difference]: Without dead ends: 118460 [2021-06-06 00:46:41,926 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:46:42,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118460 states. [2021-06-06 00:46:44,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118460 to 117198. [2021-06-06 00:46:44,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117198 states, 117197 states have (on average 4.70423304350794) internal successors, (551322), 117197 states have internal predecessors, (551322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:46:44,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117198 states to 117198 states and 551322 transitions. [2021-06-06 00:46:44,747 INFO L78 Accepts]: Start accepts. Automaton has 117198 states and 551322 transitions. Word has length 25 [2021-06-06 00:46:44,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:46:44,747 INFO L482 AbstractCegarLoop]: Abstraction has 117198 states and 551322 transitions. [2021-06-06 00:46:44,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:46:44,747 INFO L276 IsEmpty]: Start isEmpty. Operand 117198 states and 551322 transitions. [2021-06-06 00:46:45,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:46:45,014 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:46:45,014 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:46:45,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:46:45,225 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:46:45,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:46:45,225 INFO L82 PathProgramCache]: Analyzing trace with hash 751087954, now seen corresponding path program 21 times [2021-06-06 00:46:45,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:46:45,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736609771] [2021-06-06 00:46:45,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:46:45,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:46:45,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:46:45,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:46:45,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736609771] [2021-06-06 00:46:45,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736609771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:46:45,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729322607] [2021-06-06 00:46:45,256 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 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 [2021-06-06 00:46:45,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:46:45,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:46:45,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:46:45,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:46:45,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:46:45,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729322607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:46:45,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:46:45,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:46:45,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681702401] [2021-06-06 00:46:45,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:46:45,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:46:45,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:46:45,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:46:45,307 INFO L87 Difference]: Start difference. First operand 117198 states and 551322 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:46:46,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:46:46,515 INFO L93 Difference]: Finished difference Result 118753 states and 557336 transitions. [2021-06-06 00:46:46,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:46:46,515 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-06-06 00:46:46,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:46:46,939 INFO L225 Difference]: With dead ends: 118753 [2021-06-06 00:46:46,939 INFO L226 Difference]: Without dead ends: 118653 [2021-06-06 00:46:46,939 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:46:47,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118653 states. [2021-06-06 00:46:49,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118653 to 117200. [2021-06-06 00:46:49,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117200 states, 117199 states have (on average 4.704528195633069) internal successors, (551366), 117199 states have internal predecessors, (551366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:46:49,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117200 states to 117200 states and 551366 transitions. [2021-06-06 00:46:49,855 INFO L78 Accepts]: Start accepts. Automaton has 117200 states and 551366 transitions. Word has length 25 [2021-06-06 00:46:49,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:46:49,855 INFO L482 AbstractCegarLoop]: Abstraction has 117200 states and 551366 transitions. [2021-06-06 00:46:49,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:46:49,856 INFO L276 IsEmpty]: Start isEmpty. Operand 117200 states and 551366 transitions. [2021-06-06 00:46:50,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:46:50,911 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:46:50,911 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:46:51,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:46:51,127 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:46:51,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:46:51,127 INFO L82 PathProgramCache]: Analyzing trace with hash 882333870, now seen corresponding path program 19 times [2021-06-06 00:46:51,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:46:51,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990963047] [2021-06-06 00:46:51,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:46:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:46:51,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:46:51,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:46:51,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990963047] [2021-06-06 00:46:51,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990963047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:46:51,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717666718] [2021-06-06 00:46:51,154 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 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 [2021-06-06 00:46:51,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:46:51,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:46:51,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:46:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:46:51,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717666718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:46:51,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:46:51,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-06 00:46:51,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317602853] [2021-06-06 00:46:51,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:46:51,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:46:51,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:46:51,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:46:51,268 INFO L87 Difference]: Start difference. First operand 117200 states and 551366 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-06-06 00:46:52,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:46:52,503 INFO L93 Difference]: Finished difference Result 147548 states and 688527 transitions. [2021-06-06 00:46:52,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:46:52,504 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 27 [2021-06-06 00:46:52,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:46:53,506 INFO L225 Difference]: With dead ends: 147548 [2021-06-06 00:46:53,506 INFO L226 Difference]: Without dead ends: 146423 [2021-06-06 00:46:53,507 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:46:53,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146423 states. [2021-06-06 00:46:56,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146423 to 133054. [2021-06-06 00:46:56,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133054 states, 133053 states have (on average 4.703276138080314) internal successors, (625785), 133053 states have internal predecessors, (625785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:46:56,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133054 states to 133054 states and 625785 transitions. [2021-06-06 00:46:56,988 INFO L78 Accepts]: Start accepts. Automaton has 133054 states and 625785 transitions. Word has length 27 [2021-06-06 00:46:56,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:46:56,988 INFO L482 AbstractCegarLoop]: Abstraction has 133054 states and 625785 transitions. [2021-06-06 00:46:56,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-06-06 00:46:56,988 INFO L276 IsEmpty]: Start isEmpty. Operand 133054 states and 625785 transitions. [2021-06-06 00:46:57,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:46:57,860 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:46:57,860 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:46:58,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-06 00:46:58,075 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:46:58,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:46:58,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1981454638, now seen corresponding path program 21 times [2021-06-06 00:46:58,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:46:58,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290932739] [2021-06-06 00:46:58,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:46:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:46:58,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:46:58,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:46:58,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290932739] [2021-06-06 00:46:58,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290932739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:46:58,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57076875] [2021-06-06 00:46:58,102 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 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 [2021-06-06 00:46:58,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:46:58,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:46:58,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:46:58,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:46:58,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:46:58,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57076875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:46:58,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:46:58,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-06 00:46:58,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700374495] [2021-06-06 00:46:58,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:46:58,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:46:58,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:46:58,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:46:58,179 INFO L87 Difference]: Start difference. First operand 133054 states and 625785 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-06-06 00:46:59,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:46:59,179 INFO L93 Difference]: Finished difference Result 144228 states and 674583 transitions. [2021-06-06 00:46:59,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:46:59,180 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 27 [2021-06-06 00:46:59,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:47:00,170 INFO L225 Difference]: With dead ends: 144228 [2021-06-06 00:47:00,170 INFO L226 Difference]: Without dead ends: 144058 [2021-06-06 00:47:00,170 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:47:00,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144058 states. [2021-06-06 00:47:02,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144058 to 121212. [2021-06-06 00:47:02,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121212 states, 121211 states have (on average 4.70567852752638) internal successors, (570380), 121211 states have internal predecessors, (570380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:47:03,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121212 states to 121212 states and 570380 transitions. [2021-06-06 00:47:03,330 INFO L78 Accepts]: Start accepts. Automaton has 121212 states and 570380 transitions. Word has length 27 [2021-06-06 00:47:03,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:47:03,330 INFO L482 AbstractCegarLoop]: Abstraction has 121212 states and 570380 transitions. [2021-06-06 00:47:03,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-06-06 00:47:03,330 INFO L276 IsEmpty]: Start isEmpty. Operand 121212 states and 570380 transitions. [2021-06-06 00:47:03,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:47:03,625 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:47:03,625 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:47:03,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-06 00:47:03,826 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:47:03,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:47:03,826 INFO L82 PathProgramCache]: Analyzing trace with hash 864085738, now seen corresponding path program 22 times [2021-06-06 00:47:03,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:47:03,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918503645] [2021-06-06 00:47:03,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:47:03,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:47:03,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:47:03,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:47:03,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918503645] [2021-06-06 00:47:03,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918503645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:47:03,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878562230] [2021-06-06 00:47:03,850 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 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 [2021-06-06 00:47:03,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:47:03,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:47:03,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:47:03,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:47:03,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:47:03,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878562230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:47:03,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:47:03,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-06 00:47:03,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895337089] [2021-06-06 00:47:03,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:47:03,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:47:03,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:47:03,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:47:03,921 INFO L87 Difference]: Start difference. First operand 121212 states and 570380 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-06-06 00:47:05,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:47:05,427 INFO L93 Difference]: Finished difference Result 142703 states and 667037 transitions. [2021-06-06 00:47:05,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:47:05,427 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 27 [2021-06-06 00:47:05,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:47:06,339 INFO L225 Difference]: With dead ends: 142703 [2021-06-06 00:47:06,339 INFO L226 Difference]: Without dead ends: 142461 [2021-06-06 00:47:06,339 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:47:06,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142461 states. [2021-06-06 00:47:08,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142461 to 121815. [2021-06-06 00:47:08,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121815 states, 121814 states have (on average 4.707701906184839) internal successors, (573464), 121814 states have internal predecessors, (573464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:47:09,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121815 states to 121815 states and 573464 transitions. [2021-06-06 00:47:09,595 INFO L78 Accepts]: Start accepts. Automaton has 121815 states and 573464 transitions. Word has length 27 [2021-06-06 00:47:09,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:47:09,595 INFO L482 AbstractCegarLoop]: Abstraction has 121815 states and 573464 transitions. [2021-06-06 00:47:09,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-06-06 00:47:09,595 INFO L276 IsEmpty]: Start isEmpty. Operand 121815 states and 573464 transitions. [2021-06-06 00:47:09,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:47:09,879 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:47:09,879 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:47:10,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-06 00:47:10,080 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:47:10,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:47:10,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1674557870, now seen corresponding path program 9 times [2021-06-06 00:47:10,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:47:10,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055240373] [2021-06-06 00:47:10,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:47:10,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:47:10,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:47:10,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:47:10,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055240373] [2021-06-06 00:47:10,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055240373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:47:10,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350382538] [2021-06-06 00:47:10,126 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 [2021-06-06 00:47:10,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:47:10,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:47:10,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-06 00:47:10,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:47:10,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:47:10,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350382538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:47:10,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:47:10,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-06 00:47:10,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706583528] [2021-06-06 00:47:10,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:47:10,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:47:10,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:47:10,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:47:10,207 INFO L87 Difference]: Start difference. First operand 121815 states and 573464 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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) [2021-06-06 00:47:11,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:47:11,458 INFO L93 Difference]: Finished difference Result 123705 states and 580618 transitions. [2021-06-06 00:47:11,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:47:11,458 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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 27 [2021-06-06 00:47:11,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:47:11,903 INFO L225 Difference]: With dead ends: 123705 [2021-06-06 00:47:11,903 INFO L226 Difference]: Without dead ends: 123623 [2021-06-06 00:47:11,903 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 9 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:47:12,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123623 states. [2021-06-06 00:47:14,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123623 to 121965. [2021-06-06 00:47:14,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121965 states, 121964 states have (on average 4.707438260470303) internal successors, (574138), 121964 states have internal predecessors, (574138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:47:14,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121965 states to 121965 states and 574138 transitions. [2021-06-06 00:47:14,839 INFO L78 Accepts]: Start accepts. Automaton has 121965 states and 574138 transitions. Word has length 27 [2021-06-06 00:47:14,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:47:14,840 INFO L482 AbstractCegarLoop]: Abstraction has 121965 states and 574138 transitions. [2021-06-06 00:47:14,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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) [2021-06-06 00:47:14,840 INFO L276 IsEmpty]: Start isEmpty. Operand 121965 states and 574138 transitions. [2021-06-06 00:47:15,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:47:15,617 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:47:15,617 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:47:15,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:47:15,825 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:47:15,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:47:15,825 INFO L82 PathProgramCache]: Analyzing trace with hash 871441812, now seen corresponding path program 10 times [2021-06-06 00:47:15,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:47:15,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535201580] [2021-06-06 00:47:15,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:47:15,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:47:15,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:47:15,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:47:15,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535201580] [2021-06-06 00:47:15,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535201580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:47:15,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626896022] [2021-06-06 00:47:15,889 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 [2021-06-06 00:47:15,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:47:15,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:47:15,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-06 00:47:15,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:47:15,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:47:15,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626896022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:47:15,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:47:15,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-06 00:47:15,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442867004] [2021-06-06 00:47:15,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:47:15,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:47:15,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:47:15,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:47:15,959 INFO L87 Difference]: Start difference. First operand 121965 states and 574138 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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) [2021-06-06 00:47:16,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:47:16,737 INFO L93 Difference]: Finished difference Result 122799 states and 577229 transitions. [2021-06-06 00:47:16,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:47:16,738 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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 27 [2021-06-06 00:47:16,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:47:17,628 INFO L225 Difference]: With dead ends: 122799 [2021-06-06 00:47:17,628 INFO L226 Difference]: Without dead ends: 122717 [2021-06-06 00:47:17,628 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:47:17,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122717 states. [2021-06-06 00:47:19,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122717 to 121999. [2021-06-06 00:47:19,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121999 states, 121998 states have (on average 4.707495204839423) internal successors, (574305), 121998 states have internal predecessors, (574305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:47:20,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121999 states to 121999 states and 574305 transitions. [2021-06-06 00:47:20,690 INFO L78 Accepts]: Start accepts. Automaton has 121999 states and 574305 transitions. Word has length 27 [2021-06-06 00:47:20,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:47:20,690 INFO L482 AbstractCegarLoop]: Abstraction has 121999 states and 574305 transitions. [2021-06-06 00:47:20,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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) [2021-06-06 00:47:20,690 INFO L276 IsEmpty]: Start isEmpty. Operand 121999 states and 574305 transitions. [2021-06-06 00:47:20,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:47:20,972 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:47:20,972 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:47:21,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-06 00:47:21,173 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:47:21,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:47:21,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1359658504, now seen corresponding path program 11 times [2021-06-06 00:47:21,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:47:21,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857749531] [2021-06-06 00:47:21,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:47:21,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:47:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:47:21,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:47:21,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857749531] [2021-06-06 00:47:21,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857749531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:47:21,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855548179] [2021-06-06 00:47:21,238 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 [2021-06-06 00:47:21,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:47:21,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:47:21,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-06 00:47:21,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:47:21,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:47:21,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855548179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:47:21,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:47:21,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-06 00:47:21,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429626928] [2021-06-06 00:47:21,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:47:21,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:47:21,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:47:21,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:47:21,309 INFO L87 Difference]: Start difference. First operand 121999 states and 574305 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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) [2021-06-06 00:47:22,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:47:22,584 INFO L93 Difference]: Finished difference Result 123187 states and 578845 transitions. [2021-06-06 00:47:22,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:47:22,585 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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 27 [2021-06-06 00:47:22,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:47:23,044 INFO L225 Difference]: With dead ends: 123187 [2021-06-06 00:47:23,044 INFO L226 Difference]: Without dead ends: 123123 [2021-06-06 00:47:23,044 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:47:23,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123123 states. [2021-06-06 00:47:25,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123123 to 122035. [2021-06-06 00:47:25,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122035 states, 122034 states have (on average 4.707663438058246) internal successors, (574495), 122034 states have internal predecessors, (574495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:47:25,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122035 states to 122035 states and 574495 transitions. [2021-06-06 00:47:25,971 INFO L78 Accepts]: Start accepts. Automaton has 122035 states and 574495 transitions. Word has length 27 [2021-06-06 00:47:25,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:47:25,972 INFO L482 AbstractCegarLoop]: Abstraction has 122035 states and 574495 transitions. [2021-06-06 00:47:25,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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) [2021-06-06 00:47:25,972 INFO L276 IsEmpty]: Start isEmpty. Operand 122035 states and 574495 transitions. [2021-06-06 00:47:26,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:47:26,739 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:47:26,739 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:47:26,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-06-06 00:47:26,949 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:47:26,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:47:26,949 INFO L82 PathProgramCache]: Analyzing trace with hash -12880078, now seen corresponding path program 1 times [2021-06-06 00:47:26,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:47:26,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744061859] [2021-06-06 00:47:26,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:47:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:47:26,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:47:26,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:47:26,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744061859] [2021-06-06 00:47:26,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744061859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:47:26,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481030494] [2021-06-06 00:47:26,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-06 00:47:26,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:47:26,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:47:26,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:47:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:47:27,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481030494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:47:27,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:47:27,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-06 00:47:27,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119038295] [2021-06-06 00:47:27,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:47:27,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:47:27,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:47:27,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:47:27,051 INFO L87 Difference]: Start difference. First operand 122035 states and 574495 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:47:28,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:47:28,136 INFO L93 Difference]: Finished difference Result 155104 states and 720964 transitions. [2021-06-06 00:47:28,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:47:28,137 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-06 00:47:28,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:47:29,101 INFO L225 Difference]: With dead ends: 155104 [2021-06-06 00:47:29,101 INFO L226 Difference]: Without dead ends: 154336 [2021-06-06 00:47:29,102 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:47:29,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154336 states. [2021-06-06 00:47:31,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154336 to 143896. [2021-06-06 00:47:32,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143896 states, 143895 states have (on average 4.698724764585288) internal successors, (676123), 143895 states have internal predecessors, (676123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:47:33,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143896 states to 143896 states and 676123 transitions. [2021-06-06 00:47:33,505 INFO L78 Accepts]: Start accepts. Automaton has 143896 states and 676123 transitions. Word has length 27 [2021-06-06 00:47:33,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:47:33,506 INFO L482 AbstractCegarLoop]: Abstraction has 143896 states and 676123 transitions. [2021-06-06 00:47:33,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:47:33,506 INFO L276 IsEmpty]: Start isEmpty. Operand 143896 states and 676123 transitions. [2021-06-06 00:47:33,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:47:33,879 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:47:33,880 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:47:34,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:47:34,081 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:47:34,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:47:34,081 INFO L82 PathProgramCache]: Analyzing trace with hash 437854002, now seen corresponding path program 2 times [2021-06-06 00:47:34,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:47:34,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607407787] [2021-06-06 00:47:34,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:47:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:47:34,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:47:34,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:47:34,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607407787] [2021-06-06 00:47:34,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607407787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:47:34,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904678152] [2021-06-06 00:47:34,104 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 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 [2021-06-06 00:47:34,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:47:34,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:47:34,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:47:34,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:47:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:47:34,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904678152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:47:34,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:47:34,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-06 00:47:34,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115548990] [2021-06-06 00:47:34,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:47:34,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:47:34,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:47:34,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:47:34,187 INFO L87 Difference]: Start difference. First operand 143896 states and 676123 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:47:35,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:47:35,987 INFO L93 Difference]: Finished difference Result 192044 states and 890559 transitions. [2021-06-06 00:47:35,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:47:35,987 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-06 00:47:35,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:47:36,710 INFO L225 Difference]: With dead ends: 192044 [2021-06-06 00:47:36,710 INFO L226 Difference]: Without dead ends: 190887 [2021-06-06 00:47:36,710 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:47:37,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190887 states. [2021-06-06 00:47:40,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190887 to 168910. [2021-06-06 00:47:40,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168910 states, 168909 states have (on average 4.692899727071974) internal successors, (792673), 168909 states have internal predecessors, (792673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:47:41,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168910 states to 168910 states and 792673 transitions. [2021-06-06 00:47:41,873 INFO L78 Accepts]: Start accepts. Automaton has 168910 states and 792673 transitions. Word has length 27 [2021-06-06 00:47:41,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:47:41,873 INFO L482 AbstractCegarLoop]: Abstraction has 168910 states and 792673 transitions. [2021-06-06 00:47:41,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:47:41,873 INFO L276 IsEmpty]: Start isEmpty. Operand 168910 states and 792673 transitions. [2021-06-06 00:47:42,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:47:42,304 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:47:42,304 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:47:42,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:47:42,505 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:47:42,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:47:42,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1592361616, now seen corresponding path program 20 times [2021-06-06 00:47:42,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:47:42,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498134814] [2021-06-06 00:47:42,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:47:42,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:47:42,534 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:47:42,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:47:42,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498134814] [2021-06-06 00:47:42,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498134814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:47:42,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461021889] [2021-06-06 00:47:42,535 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 [2021-06-06 00:47:42,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:47:42,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:47:42,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:47:42,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:47:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:47:42,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461021889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:47:42,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:47:42,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-06 00:47:42,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779679602] [2021-06-06 00:47:42,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:47:42,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:47:42,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:47:42,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:47:42,636 INFO L87 Difference]: Start difference. First operand 168910 states and 792673 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:47:44,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:47:44,453 INFO L93 Difference]: Finished difference Result 184550 states and 860326 transitions. [2021-06-06 00:47:44,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:47:44,454 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-06 00:47:44,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:47:45,531 INFO L225 Difference]: With dead ends: 184550 [2021-06-06 00:47:45,531 INFO L226 Difference]: Without dead ends: 184501 [2021-06-06 00:47:45,531 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 121.6ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:47:45,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184501 states. [2021-06-06 00:47:49,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184501 to 169053. [2021-06-06 00:47:49,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169053 states, 169052 states have (on average 4.692006009985094) internal successors, (793193), 169052 states have internal predecessors, (793193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:47:50,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169053 states to 169053 states and 793193 transitions. [2021-06-06 00:47:50,339 INFO L78 Accepts]: Start accepts. Automaton has 169053 states and 793193 transitions. Word has length 27 [2021-06-06 00:47:50,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:47:50,339 INFO L482 AbstractCegarLoop]: Abstraction has 169053 states and 793193 transitions. [2021-06-06 00:47:50,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:47:50,339 INFO L276 IsEmpty]: Start isEmpty. Operand 169053 states and 793193 transitions. [2021-06-06 00:47:50,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:47:50,759 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:47:50,759 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:47:50,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:47:50,959 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:47:50,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:47:50,959 INFO L82 PathProgramCache]: Analyzing trace with hash -571422738, now seen corresponding path program 3 times [2021-06-06 00:47:50,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:47:50,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295848164] [2021-06-06 00:47:50,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:47:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:47:50,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:47:50,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:47:50,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295848164] [2021-06-06 00:47:50,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295848164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:47:50,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759064571] [2021-06-06 00:47:50,985 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 [2021-06-06 00:47:51,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:47:51,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:47:51,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:47:51,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:47:51,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:47:51,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759064571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:47:51,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:47:51,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-06 00:47:51,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779128342] [2021-06-06 00:47:51,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:47:51,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:47:51,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:47:51,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:47:51,630 INFO L87 Difference]: Start difference. First operand 169053 states and 793193 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:47:53,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:47:53,465 INFO L93 Difference]: Finished difference Result 230190 states and 1066278 transitions. [2021-06-06 00:47:53,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:47:53,466 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-06 00:47:53,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:47:54,330 INFO L225 Difference]: With dead ends: 230190 [2021-06-06 00:47:54,330 INFO L226 Difference]: Without dead ends: 228007 [2021-06-06 00:47:54,330 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:47:54,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228007 states. [2021-06-06 00:47:58,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228007 to 157964. [2021-06-06 00:47:58,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157964 states, 157963 states have (on average 4.688616954603293) internal successors, (740628), 157963 states have internal predecessors, (740628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:47:59,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157964 states to 157964 states and 740628 transitions. [2021-06-06 00:47:59,573 INFO L78 Accepts]: Start accepts. Automaton has 157964 states and 740628 transitions. Word has length 27 [2021-06-06 00:47:59,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:47:59,573 INFO L482 AbstractCegarLoop]: Abstraction has 157964 states and 740628 transitions. [2021-06-06 00:47:59,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:47:59,573 INFO L276 IsEmpty]: Start isEmpty. Operand 157964 states and 740628 transitions. [2021-06-06 00:47:59,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:47:59,985 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:47:59,985 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:48:00,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:48:00,200 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:48:00,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:48:00,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1228632456, now seen corresponding path program 21 times [2021-06-06 00:48:00,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:48:00,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630997393] [2021-06-06 00:48:00,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:48:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:48:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:48:00,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:48:00,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630997393] [2021-06-06 00:48:00,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630997393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:48:00,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038116756] [2021-06-06 00:48:00,239 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 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 [2021-06-06 00:48:00,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:48:00,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:48:00,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:48:00,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:48:00,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:48:00,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038116756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:48:00,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:48:00,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-06 00:48:00,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126098121] [2021-06-06 00:48:00,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:48:00,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:48:00,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:48:00,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:48:00,336 INFO L87 Difference]: Start difference. First operand 157964 states and 740628 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:48:02,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:48:02,147 INFO L93 Difference]: Finished difference Result 173681 states and 808144 transitions. [2021-06-06 00:48:02,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:48:02,148 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-06 00:48:02,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:48:02,770 INFO L225 Difference]: With dead ends: 173681 [2021-06-06 00:48:02,770 INFO L226 Difference]: Without dead ends: 173615 [2021-06-06 00:48:02,770 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 160.1ms TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:48:02,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173615 states. [2021-06-06 00:48:06,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173615 to 158249. [2021-06-06 00:48:06,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158249 states, 158248 states have (on average 4.688217228653759) internal successors, (741901), 158248 states have internal predecessors, (741901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:48:07,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158249 states to 158249 states and 741901 transitions. [2021-06-06 00:48:07,734 INFO L78 Accepts]: Start accepts. Automaton has 158249 states and 741901 transitions. Word has length 27 [2021-06-06 00:48:07,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:48:07,734 INFO L482 AbstractCegarLoop]: Abstraction has 158249 states and 741901 transitions. [2021-06-06 00:48:07,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:48:07,735 INFO L276 IsEmpty]: Start isEmpty. Operand 158249 states and 741901 transitions. [2021-06-06 00:48:08,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:48:08,157 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:48:08,157 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:48:08,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-06 00:48:08,357 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:48:08,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:48:08,358 INFO L82 PathProgramCache]: Analyzing trace with hash -319776846, now seen corresponding path program 1 times [2021-06-06 00:48:08,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:48:08,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372455605] [2021-06-06 00:48:08,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:48:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:48:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:48:08,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:48:08,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372455605] [2021-06-06 00:48:08,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372455605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:48:08,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602347990] [2021-06-06 00:48:08,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-06 00:48:08,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:48:08,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-06 00:48:08,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:48:08,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:48:08,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602347990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:48:08,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:48:08,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-06 00:48:08,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635999028] [2021-06-06 00:48:08,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:48:08,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:48:08,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:48:08,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:48:08,491 INFO L87 Difference]: Start difference. First operand 158249 states and 741901 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 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) [2021-06-06 00:48:10,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:48:10,117 INFO L93 Difference]: Finished difference Result 160685 states and 751012 transitions. [2021-06-06 00:48:10,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:48:10,117 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 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 27 [2021-06-06 00:48:10,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:48:10,686 INFO L225 Difference]: With dead ends: 160685 [2021-06-06 00:48:10,686 INFO L226 Difference]: Without dead ends: 160585 [2021-06-06 00:48:10,686 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:48:10,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160585 states. [2021-06-06 00:48:14,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160585 to 158284. [2021-06-06 00:48:14,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158284 states, 158283 states have (on average 4.688456751514692) internal successors, (742103), 158283 states have internal predecessors, (742103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:48:15,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158284 states to 158284 states and 742103 transitions. [2021-06-06 00:48:15,453 INFO L78 Accepts]: Start accepts. Automaton has 158284 states and 742103 transitions. Word has length 27 [2021-06-06 00:48:15,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:48:15,454 INFO L482 AbstractCegarLoop]: Abstraction has 158284 states and 742103 transitions. [2021-06-06 00:48:15,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 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) [2021-06-06 00:48:15,454 INFO L276 IsEmpty]: Start isEmpty. Operand 158284 states and 742103 transitions. [2021-06-06 00:48:16,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:48:16,431 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:48:16,432 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:48:16,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-06 00:48:16,641 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:48:16,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:48:16,641 INFO L82 PathProgramCache]: Analyzing trace with hash 507795822, now seen corresponding path program 2 times [2021-06-06 00:48:16,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:48:16,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139350689] [2021-06-06 00:48:16,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:48:16,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:48:16,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:48:16,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:48:16,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139350689] [2021-06-06 00:48:16,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139350689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:48:16,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288787788] [2021-06-06 00:48:16,717 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 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 [2021-06-06 00:48:16,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:48:16,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:48:16,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-06 00:48:16,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:48:16,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:48:16,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288787788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:48:16,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:48:16,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-06 00:48:16,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061565075] [2021-06-06 00:48:16,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:48:16,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:48:16,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:48:16,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:48:16,791 INFO L87 Difference]: Start difference. First operand 158284 states and 742103 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 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) [2021-06-06 00:48:18,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:48:18,257 INFO L93 Difference]: Finished difference Result 161393 states and 754186 transitions. [2021-06-06 00:48:18,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:48:18,257 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 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 27 [2021-06-06 00:48:18,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:48:18,859 INFO L225 Difference]: With dead ends: 161393 [2021-06-06 00:48:18,859 INFO L226 Difference]: Without dead ends: 161317 [2021-06-06 00:48:18,859 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:48:19,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161317 states. [2021-06-06 00:48:21,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161317 to 158335. [2021-06-06 00:48:21,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158335 states, 158334 states have (on average 4.688613942678136) internal successors, (742367), 158334 states have internal predecessors, (742367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:48:23,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158335 states to 158335 states and 742367 transitions. [2021-06-06 00:48:23,111 INFO L78 Accepts]: Start accepts. Automaton has 158335 states and 742367 transitions. Word has length 27 [2021-06-06 00:48:23,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:48:23,111 INFO L482 AbstractCegarLoop]: Abstraction has 158335 states and 742367 transitions. [2021-06-06 00:48:23,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 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) [2021-06-06 00:48:23,111 INFO L276 IsEmpty]: Start isEmpty. Operand 158335 states and 742367 transitions. [2021-06-06 00:48:23,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:48:23,506 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:48:23,506 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:48:23,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-06 00:48:23,706 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:48:23,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:48:23,707 INFO L82 PathProgramCache]: Analyzing trace with hash -2038071594, now seen corresponding path program 3 times [2021-06-06 00:48:23,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:48:23,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90713049] [2021-06-06 00:48:23,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:48:23,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:48:23,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:48:23,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:48:23,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90713049] [2021-06-06 00:48:23,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90713049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:48:23,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529996477] [2021-06-06 00:48:23,778 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 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 [2021-06-06 00:48:23,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:48:23,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:48:23,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-06 00:48:23,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:48:23,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:48:23,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529996477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:48:23,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:48:23,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-06 00:48:23,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063492249] [2021-06-06 00:48:23,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:48:23,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:48:23,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:48:23,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:48:23,854 INFO L87 Difference]: Start difference. First operand 158335 states and 742367 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 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) [2021-06-06 00:48:25,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:48:25,525 INFO L93 Difference]: Finished difference Result 160525 states and 750588 transitions. [2021-06-06 00:48:25,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:48:25,526 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 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 27 [2021-06-06 00:48:25,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:48:26,132 INFO L225 Difference]: With dead ends: 160525 [2021-06-06 00:48:26,132 INFO L226 Difference]: Without dead ends: 160437 [2021-06-06 00:48:26,133 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:48:26,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160437 states. [2021-06-06 00:48:29,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160437 to 158356. [2021-06-06 00:48:29,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158356 states, 158355 states have (on average 4.688806794859651) internal successors, (742496), 158355 states have internal predecessors, (742496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:48:30,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158356 states to 158356 states and 742496 transitions. [2021-06-06 00:48:30,414 INFO L78 Accepts]: Start accepts. Automaton has 158356 states and 742496 transitions. Word has length 27 [2021-06-06 00:48:30,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:48:30,415 INFO L482 AbstractCegarLoop]: Abstraction has 158356 states and 742496 transitions. [2021-06-06 00:48:30,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 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) [2021-06-06 00:48:30,415 INFO L276 IsEmpty]: Start isEmpty. Operand 158356 states and 742496 transitions. [2021-06-06 00:48:31,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:48:31,406 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:48:31,406 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:48:31,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-06 00:48:31,607 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:48:31,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:48:31,607 INFO L82 PathProgramCache]: Analyzing trace with hash 298756018, now seen corresponding path program 4 times [2021-06-06 00:48:31,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:48:31,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155078878] [2021-06-06 00:48:31,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:48:31,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:48:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:48:31,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:48:31,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155078878] [2021-06-06 00:48:31,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155078878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:48:31,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358134283] [2021-06-06 00:48:31,663 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 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 [2021-06-06 00:48:31,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:48:31,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:48:31,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-06 00:48:31,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:48:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:48:31,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358134283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:48:31,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:48:31,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-06 00:48:31,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510723775] [2021-06-06 00:48:31,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:48:31,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:48:31,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:48:31,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:48:31,751 INFO L87 Difference]: Start difference. First operand 158356 states and 742496 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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) [2021-06-06 00:48:33,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:48:33,262 INFO L93 Difference]: Finished difference Result 163254 states and 762103 transitions. [2021-06-06 00:48:33,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:48:33,262 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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 27 [2021-06-06 00:48:33,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:48:33,838 INFO L225 Difference]: With dead ends: 163254 [2021-06-06 00:48:33,838 INFO L226 Difference]: Without dead ends: 163178 [2021-06-06 00:48:33,838 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 9 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:48:34,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163178 states. [2021-06-06 00:48:36,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163178 to 158476. [2021-06-06 00:48:37,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158476 states, 158475 states have (on average 4.689004574854078) internal successors, (743090), 158475 states have internal predecessors, (743090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:48:38,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158476 states to 158476 states and 743090 transitions. [2021-06-06 00:48:38,223 INFO L78 Accepts]: Start accepts. Automaton has 158476 states and 743090 transitions. Word has length 27 [2021-06-06 00:48:38,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:48:38,223 INFO L482 AbstractCegarLoop]: Abstraction has 158476 states and 743090 transitions. [2021-06-06 00:48:38,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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) [2021-06-06 00:48:38,223 INFO L276 IsEmpty]: Start isEmpty. Operand 158476 states and 743090 transitions. [2021-06-06 00:48:38,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:48:38,615 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:48:38,615 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:48:38,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-06 00:48:38,815 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:48:38,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:48:38,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1044976122, now seen corresponding path program 5 times [2021-06-06 00:48:38,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:48:38,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315333373] [2021-06-06 00:48:38,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:48:38,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:48:38,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:48:38,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:48:38,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315333373] [2021-06-06 00:48:38,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315333373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:48:38,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961704076] [2021-06-06 00:48:38,884 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 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 [2021-06-06 00:48:38,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:48:38,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:48:38,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-06 00:48:38,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:48:38,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:48:38,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961704076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:48:38,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:48:38,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-06 00:48:38,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140477545] [2021-06-06 00:48:38,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:48:38,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:48:38,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:48:38,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:48:38,955 INFO L87 Difference]: Start difference. First operand 158476 states and 743090 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 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) [2021-06-06 00:48:40,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:48:40,532 INFO L93 Difference]: Finished difference Result 163798 states and 764346 transitions. [2021-06-06 00:48:40,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:48:40,532 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 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 27 [2021-06-06 00:48:40,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:48:41,470 INFO L225 Difference]: With dead ends: 163798 [2021-06-06 00:48:41,470 INFO L226 Difference]: Without dead ends: 163722 [2021-06-06 00:48:41,470 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:48:41,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163722 states. [2021-06-06 00:48:44,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163722 to 158493. [2021-06-06 00:48:44,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158493 states, 158492 states have (on average 4.688968528379982) internal successors, (743164), 158492 states have internal predecessors, (743164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:48:45,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158493 states to 158493 states and 743164 transitions. [2021-06-06 00:48:45,840 INFO L78 Accepts]: Start accepts. Automaton has 158493 states and 743164 transitions. Word has length 27 [2021-06-06 00:48:45,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:48:45,840 INFO L482 AbstractCegarLoop]: Abstraction has 158493 states and 743164 transitions. [2021-06-06 00:48:45,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 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) [2021-06-06 00:48:45,840 INFO L276 IsEmpty]: Start isEmpty. Operand 158493 states and 743164 transitions. [2021-06-06 00:48:46,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:48:46,240 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:48:46,240 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:48:46,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:48:46,440 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:48:46,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:48:46,441 INFO L82 PathProgramCache]: Analyzing trace with hash 704123758, now seen corresponding path program 6 times [2021-06-06 00:48:46,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:48:46,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910791632] [2021-06-06 00:48:46,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:48:46,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:48:46,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:48:46,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:48:46,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910791632] [2021-06-06 00:48:46,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910791632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:48:46,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653478264] [2021-06-06 00:48:46,507 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 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 [2021-06-06 00:48:46,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-06 00:48:46,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:48:46,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-06 00:48:46,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:48:46,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:48:46,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653478264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:48:46,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:48:46,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-06 00:48:46,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80138340] [2021-06-06 00:48:46,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:48:46,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:48:46,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:48:46,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:48:46,581 INFO L87 Difference]: Start difference. First operand 158493 states and 743164 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 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) [2021-06-06 00:48:48,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:48:48,177 INFO L93 Difference]: Finished difference Result 162734 states and 759671 transitions. [2021-06-06 00:48:48,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:48:48,177 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 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 27 [2021-06-06 00:48:48,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:48:48,769 INFO L225 Difference]: With dead ends: 162734 [2021-06-06 00:48:48,769 INFO L226 Difference]: Without dead ends: 162646 [2021-06-06 00:48:48,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:48:48,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162646 states. [2021-06-06 00:48:52,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162646 to 158518. [2021-06-06 00:48:52,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158518 states, 158517 states have (on average 4.689320388349515) internal successors, (743337), 158517 states have internal predecessors, (743337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:48:53,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158518 states to 158518 states and 743337 transitions. [2021-06-06 00:48:53,795 INFO L78 Accepts]: Start accepts. Automaton has 158518 states and 743337 transitions. Word has length 27 [2021-06-06 00:48:53,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:48:53,795 INFO L482 AbstractCegarLoop]: Abstraction has 158518 states and 743337 transitions. [2021-06-06 00:48:53,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 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) [2021-06-06 00:48:53,795 INFO L276 IsEmpty]: Start isEmpty. Operand 158518 states and 743337 transitions. [2021-06-06 00:48:54,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:48:54,336 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:48:54,336 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:48:54,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-06 00:48:54,541 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:48:54,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:48:54,541 INFO L82 PathProgramCache]: Analyzing trace with hash 994714892, now seen corresponding path program 22 times [2021-06-06 00:48:54,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:48:54,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185934492] [2021-06-06 00:48:54,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:48:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:48:54,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:48:54,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:48:54,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185934492] [2021-06-06 00:48:54,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185934492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:48:54,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800281058] [2021-06-06 00:48:54,570 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 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 [2021-06-06 00:48:54,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:48:54,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:48:54,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:48:54,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:48:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:48:54,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800281058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:48:54,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:48:54,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-06 00:48:54,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287117403] [2021-06-06 00:48:54,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:48:54,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:48:54,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:48:54,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:48:54,657 INFO L87 Difference]: Start difference. First operand 158518 states and 743337 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:48:56,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:48:56,592 INFO L93 Difference]: Finished difference Result 173326 states and 807474 transitions. [2021-06-06 00:48:56,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:48:56,593 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-06 00:48:56,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:48:57,601 INFO L225 Difference]: With dead ends: 173326 [2021-06-06 00:48:57,601 INFO L226 Difference]: Without dead ends: 173235 [2021-06-06 00:48:57,601 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 191.6ms TimeCoverageRelationStatistics Valid=241, Invalid=571, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:48:57,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173235 states. [2021-06-06 00:49:00,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173235 to 158602. [2021-06-06 00:49:00,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158602 states, 158601 states have (on average 4.687082679176045) internal successors, (743376), 158601 states have internal predecessors, (743376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:49:02,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158602 states to 158602 states and 743376 transitions. [2021-06-06 00:49:02,088 INFO L78 Accepts]: Start accepts. Automaton has 158602 states and 743376 transitions. Word has length 27 [2021-06-06 00:49:02,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:49:02,089 INFO L482 AbstractCegarLoop]: Abstraction has 158602 states and 743376 transitions. [2021-06-06 00:49:02,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:49:02,089 INFO L276 IsEmpty]: Start isEmpty. Operand 158602 states and 743376 transitions. [2021-06-06 00:49:02,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:49:02,489 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:49:02,489 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:49:02,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:49:02,690 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:49:02,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:49:02,690 INFO L82 PathProgramCache]: Analyzing trace with hash -4179154, now seen corresponding path program 23 times [2021-06-06 00:49:02,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:49:02,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651444096] [2021-06-06 00:49:02,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:49:02,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:49:02,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:49:02,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:49:02,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651444096] [2021-06-06 00:49:02,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651444096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:49:02,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415036650] [2021-06-06 00:49:02,732 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 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 [2021-06-06 00:49:02,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:49:02,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:49:02,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-06 00:49:02,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:49:02,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:49:02,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415036650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:49:02,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:49:02,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-06 00:49:02,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547277647] [2021-06-06 00:49:02,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:49:02,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:49:02,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:49:02,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:49:02,793 INFO L87 Difference]: Start difference. First operand 158602 states and 743376 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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) [2021-06-06 00:49:04,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:49:04,274 INFO L93 Difference]: Finished difference Result 160196 states and 749345 transitions. [2021-06-06 00:49:04,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:49:04,275 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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 27 [2021-06-06 00:49:04,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:49:04,877 INFO L225 Difference]: With dead ends: 160196 [2021-06-06 00:49:04,877 INFO L226 Difference]: Without dead ends: 160087 [2021-06-06 00:49:04,877 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:49:05,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160087 states. [2021-06-06 00:49:08,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160087 to 158858. [2021-06-06 00:49:08,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158858 states, 158857 states have (on average 4.685679573452854) internal successors, (744353), 158857 states have internal predecessors, (744353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:49:09,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158858 states to 158858 states and 744353 transitions. [2021-06-06 00:49:09,112 INFO L78 Accepts]: Start accepts. Automaton has 158858 states and 744353 transitions. Word has length 27 [2021-06-06 00:49:09,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:49:09,112 INFO L482 AbstractCegarLoop]: Abstraction has 158858 states and 744353 transitions. [2021-06-06 00:49:09,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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) [2021-06-06 00:49:09,113 INFO L276 IsEmpty]: Start isEmpty. Operand 158858 states and 744353 transitions. [2021-06-06 00:49:10,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:49:10,105 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:49:10,105 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:49:10,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:49:10,321 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:49:10,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:49:10,321 INFO L82 PathProgramCache]: Analyzing trace with hash -633472846, now seen corresponding path program 24 times [2021-06-06 00:49:10,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:49:10,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683126826] [2021-06-06 00:49:10,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:49:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:49:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:49:10,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:49:10,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683126826] [2021-06-06 00:49:10,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683126826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:49:10,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705511765] [2021-06-06 00:49:10,382 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 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 [2021-06-06 00:49:10,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:49:10,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:49:10,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-06 00:49:10,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:49:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:49:10,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705511765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:49:10,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:49:10,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:49:10,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94481799] [2021-06-06 00:49:10,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:49:10,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:49:10,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:49:10,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:49:10,514 INFO L87 Difference]: Start difference. First operand 158858 states and 744353 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:49:12,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:49:12,207 INFO L93 Difference]: Finished difference Result 173498 states and 806452 transitions. [2021-06-06 00:49:12,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:49:12,207 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-06 00:49:12,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:49:12,809 INFO L225 Difference]: With dead ends: 173498 [2021-06-06 00:49:12,809 INFO L226 Difference]: Without dead ends: 173121 [2021-06-06 00:49:12,809 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 186.9ms TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:49:12,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173121 states. [2021-06-06 00:49:15,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173121 to 159323. [2021-06-06 00:49:16,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159323 states, 159322 states have (on average 4.6852098266403885) internal successors, (746457), 159322 states have internal predecessors, (746457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:49:17,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159323 states to 159323 states and 746457 transitions. [2021-06-06 00:49:17,112 INFO L78 Accepts]: Start accepts. Automaton has 159323 states and 746457 transitions. Word has length 27 [2021-06-06 00:49:17,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:49:17,112 INFO L482 AbstractCegarLoop]: Abstraction has 159323 states and 746457 transitions. [2021-06-06 00:49:17,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:49:17,113 INFO L276 IsEmpty]: Start isEmpty. Operand 159323 states and 746457 transitions. [2021-06-06 00:49:17,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:49:17,504 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:49:17,504 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:49:17,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2021-06-06 00:49:17,705 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:49:17,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:49:17,705 INFO L82 PathProgramCache]: Analyzing trace with hash -416444856, now seen corresponding path program 25 times [2021-06-06 00:49:17,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:49:17,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058456521] [2021-06-06 00:49:17,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:49:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:49:17,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:49:17,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:49:17,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058456521] [2021-06-06 00:49:17,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058456521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:49:17,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639122349] [2021-06-06 00:49:17,765 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 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 [2021-06-06 00:49:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:49:17,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-06 00:49:17,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:49:17,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:49:17,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639122349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:49:17,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:49:17,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-06 00:49:17,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720721813] [2021-06-06 00:49:17,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:49:17,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:49:17,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:49:17,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:49:17,889 INFO L87 Difference]: Start difference. First operand 159323 states and 746457 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:49:19,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:49:19,556 INFO L93 Difference]: Finished difference Result 161191 states and 753361 transitions. [2021-06-06 00:49:19,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:49:19,557 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-06 00:49:19,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:49:20,550 INFO L225 Difference]: With dead ends: 161191 [2021-06-06 00:49:20,551 INFO L226 Difference]: Without dead ends: 161077 [2021-06-06 00:49:20,551 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 133.3ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:49:20,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161077 states. [2021-06-06 00:49:23,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161077 to 159177. [2021-06-06 00:49:23,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159177 states, 159176 states have (on average 4.685429964316229) internal successors, (745808), 159176 states have internal predecessors, (745808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:49:24,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159177 states to 159177 states and 745808 transitions. [2021-06-06 00:49:24,902 INFO L78 Accepts]: Start accepts. Automaton has 159177 states and 745808 transitions. Word has length 27 [2021-06-06 00:49:24,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:49:24,902 INFO L482 AbstractCegarLoop]: Abstraction has 159177 states and 745808 transitions. [2021-06-06 00:49:24,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:49:24,902 INFO L276 IsEmpty]: Start isEmpty. Operand 159177 states and 745808 transitions. [2021-06-06 00:49:25,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:49:25,309 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:49:25,309 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:49:25,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-06 00:49:25,513 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:49:25,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:49:25,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1482095318, now seen corresponding path program 26 times [2021-06-06 00:49:25,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:49:25,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529483440] [2021-06-06 00:49:25,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:49:25,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:49:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:49:25,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:49:25,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529483440] [2021-06-06 00:49:25,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529483440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:49:25,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967032651] [2021-06-06 00:49:25,578 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 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 [2021-06-06 00:49:25,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:49:25,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:49:25,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-06 00:49:25,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:49:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:49:25,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967032651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:49:25,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:49:25,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:49:25,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791950759] [2021-06-06 00:49:25,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:49:25,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:49:25,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:49:25,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:49:25,735 INFO L87 Difference]: Start difference. First operand 159177 states and 745808 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:49:28,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:49:28,500 INFO L93 Difference]: Finished difference Result 228696 states and 1062089 transitions. [2021-06-06 00:49:28,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:49:28,501 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-06 00:49:28,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:49:29,989 INFO L225 Difference]: With dead ends: 228696 [2021-06-06 00:49:29,989 INFO L226 Difference]: Without dead ends: 228340 [2021-06-06 00:49:29,991 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 317.6ms TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:49:30,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228340 states. [2021-06-06 00:49:34,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228340 to 162643. [2021-06-06 00:49:34,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162643 states, 162642 states have (on average 4.686876698515759) internal successors, (762283), 162642 states have internal predecessors, (762283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:49:35,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162643 states to 162643 states and 762283 transitions. [2021-06-06 00:49:35,168 INFO L78 Accepts]: Start accepts. Automaton has 162643 states and 762283 transitions. Word has length 27 [2021-06-06 00:49:35,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:49:35,168 INFO L482 AbstractCegarLoop]: Abstraction has 162643 states and 762283 transitions. [2021-06-06 00:49:35,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:49:35,168 INFO L276 IsEmpty]: Start isEmpty. Operand 162643 states and 762283 transitions. [2021-06-06 00:49:36,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:49:36,202 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:49:36,202 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:49:36,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:49:36,410 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:49:36,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:49:36,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1862249856, now seen corresponding path program 27 times [2021-06-06 00:49:36,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:49:36,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962539675] [2021-06-06 00:49:36,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:49:36,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:49:36,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:49:36,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:49:36,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962539675] [2021-06-06 00:49:36,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962539675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:49:36,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634071169] [2021-06-06 00:49:36,472 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 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 [2021-06-06 00:49:36,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:49:36,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:49:36,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-06 00:49:36,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:49:36,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:49:36,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634071169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:49:36,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:49:36,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:49:36,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997849095] [2021-06-06 00:49:36,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:49:36,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:49:36,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:49:36,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:49:36,609 INFO L87 Difference]: Start difference. First operand 162643 states and 762283 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:49:38,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:49:38,587 INFO L93 Difference]: Finished difference Result 202003 states and 940062 transitions. [2021-06-06 00:49:38,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:49:38,588 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-06 00:49:38,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:49:39,335 INFO L225 Difference]: With dead ends: 202003 [2021-06-06 00:49:39,335 INFO L226 Difference]: Without dead ends: 201790 [2021-06-06 00:49:39,335 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 197.9ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:49:39,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201790 states. [2021-06-06 00:49:43,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201790 to 162968. [2021-06-06 00:49:43,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162968 states, 162967 states have (on average 4.6873354728257866) internal successors, (763881), 162967 states have internal predecessors, (763881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:49:44,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162968 states to 162968 states and 763881 transitions. [2021-06-06 00:49:44,535 INFO L78 Accepts]: Start accepts. Automaton has 162968 states and 763881 transitions. Word has length 27 [2021-06-06 00:49:44,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:49:44,535 INFO L482 AbstractCegarLoop]: Abstraction has 162968 states and 763881 transitions. [2021-06-06 00:49:44,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:49:44,535 INFO L276 IsEmpty]: Start isEmpty. Operand 162968 states and 763881 transitions. [2021-06-06 00:49:44,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:49:44,946 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:49:44,946 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:49:45,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-06-06 00:49:45,146 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:49:45,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:49:45,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1181669522, now seen corresponding path program 28 times [2021-06-06 00:49:45,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:49:45,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871159393] [2021-06-06 00:49:45,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:49:45,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:49:45,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:49:45,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:49:45,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871159393] [2021-06-06 00:49:45,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871159393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:49:45,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492721040] [2021-06-06 00:49:45,208 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 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 [2021-06-06 00:49:45,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:49:45,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:49:45,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-06 00:49:45,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:49:45,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:49:45,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492721040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:49:45,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:49:45,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-06 00:49:45,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610392937] [2021-06-06 00:49:45,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:49:45,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:49:45,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:49:45,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:49:45,348 INFO L87 Difference]: Start difference. First operand 162968 states and 763881 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:49:47,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:49:47,261 INFO L93 Difference]: Finished difference Result 164630 states and 769931 transitions. [2021-06-06 00:49:47,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:49:47,261 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-06 00:49:47,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:49:47,859 INFO L225 Difference]: With dead ends: 164630 [2021-06-06 00:49:47,859 INFO L226 Difference]: Without dead ends: 164486 [2021-06-06 00:49:47,859 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 132.7ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:49:48,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164486 states. [2021-06-06 00:49:51,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164486 to 162968. [2021-06-06 00:49:51,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162968 states, 162967 states have (on average 4.68723115722815) internal successors, (763864), 162967 states have internal predecessors, (763864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:49:52,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162968 states to 162968 states and 763864 transitions. [2021-06-06 00:49:52,702 INFO L78 Accepts]: Start accepts. Automaton has 162968 states and 763864 transitions. Word has length 27 [2021-06-06 00:49:52,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:49:52,702 INFO L482 AbstractCegarLoop]: Abstraction has 162968 states and 763864 transitions. [2021-06-06 00:49:52,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:49:52,702 INFO L276 IsEmpty]: Start isEmpty. Operand 162968 states and 763864 transitions. [2021-06-06 00:49:53,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:49:53,134 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:49:53,134 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:49:53,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:49:53,334 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:49:53,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:49:53,335 INFO L82 PathProgramCache]: Analyzing trace with hash 2006632694, now seen corresponding path program 29 times [2021-06-06 00:49:53,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:49:53,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349861580] [2021-06-06 00:49:53,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:49:53,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:49:53,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:49:53,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:49:53,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349861580] [2021-06-06 00:49:53,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349861580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:49:53,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358483673] [2021-06-06 00:49:53,408 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 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 [2021-06-06 00:49:53,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:49:53,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:49:53,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-06 00:49:53,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:49:53,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:49:53,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358483673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:49:53,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:49:53,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-06 00:49:53,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474171353] [2021-06-06 00:49:53,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:49:53,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:49:53,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:49:53,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:49:53,573 INFO L87 Difference]: Start difference. First operand 162968 states and 763864 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:49:55,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:49:55,904 INFO L93 Difference]: Finished difference Result 208529 states and 970068 transitions. [2021-06-06 00:49:55,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:49:55,904 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-06 00:49:55,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:49:57,150 INFO L225 Difference]: With dead ends: 208529 [2021-06-06 00:49:57,150 INFO L226 Difference]: Without dead ends: 208061 [2021-06-06 00:49:57,151 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 457.7ms TimeCoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2021-06-06 00:49:57,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208061 states. [2021-06-06 00:50:01,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208061 to 163486. [2021-06-06 00:50:01,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163486 states, 163485 states have (on average 4.687842921368933) internal successors, (766392), 163485 states have internal predecessors, (766392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:50:02,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163486 states to 163486 states and 766392 transitions. [2021-06-06 00:50:02,004 INFO L78 Accepts]: Start accepts. Automaton has 163486 states and 766392 transitions. Word has length 27 [2021-06-06 00:50:02,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:50:02,004 INFO L482 AbstractCegarLoop]: Abstraction has 163486 states and 766392 transitions. [2021-06-06 00:50:02,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:50:02,004 INFO L276 IsEmpty]: Start isEmpty. Operand 163486 states and 766392 transitions. [2021-06-06 00:50:03,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:50:03,065 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:50:03,065 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:50:03,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:50:03,281 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:50:03,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:50:03,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1626478156, now seen corresponding path program 30 times [2021-06-06 00:50:03,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:50:03,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322294883] [2021-06-06 00:50:03,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:50:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:50:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:50:03,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:50:03,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322294883] [2021-06-06 00:50:03,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322294883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:50:03,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959468964] [2021-06-06 00:50:03,346 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 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 [2021-06-06 00:50:03,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:50:03,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:50:03,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-06 00:50:03,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:50:03,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:50:03,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959468964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:50:03,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:50:03,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:50:03,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765459556] [2021-06-06 00:50:03,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:50:03,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:50:03,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:50:03,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:50:03,528 INFO L87 Difference]: Start difference. First operand 163486 states and 766392 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:50:05,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:50:05,728 INFO L93 Difference]: Finished difference Result 203808 states and 947862 transitions. [2021-06-06 00:50:05,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:50:05,728 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-06 00:50:05,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:50:06,508 INFO L225 Difference]: With dead ends: 203808 [2021-06-06 00:50:06,509 INFO L226 Difference]: Without dead ends: 203595 [2021-06-06 00:50:06,509 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 288.3ms TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:50:06,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203595 states. [2021-06-06 00:50:10,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203595 to 163503. [2021-06-06 00:50:10,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163503 states, 163502 states have (on average 4.6880833261978445) internal successors, (766511), 163502 states have internal predecessors, (766511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:50:11,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163503 states to 163503 states and 766511 transitions. [2021-06-06 00:50:11,891 INFO L78 Accepts]: Start accepts. Automaton has 163503 states and 766511 transitions. Word has length 27 [2021-06-06 00:50:11,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:50:11,891 INFO L482 AbstractCegarLoop]: Abstraction has 163503 states and 766511 transitions. [2021-06-06 00:50:11,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:50:11,891 INFO L276 IsEmpty]: Start isEmpty. Operand 163503 states and 766511 transitions. [2021-06-06 00:50:12,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:50:12,828 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:50:12,828 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:50:13,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-06 00:50:13,041 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:50:13,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:50:13,041 INFO L82 PathProgramCache]: Analyzing trace with hash -887056394, now seen corresponding path program 7 times [2021-06-06 00:50:13,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:50:13,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877826705] [2021-06-06 00:50:13,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:50:13,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:50:13,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:50:13,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:50:13,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877826705] [2021-06-06 00:50:13,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877826705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:50:13,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092679183] [2021-06-06 00:50:13,131 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 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 [2021-06-06 00:50:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:50:13,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-06 00:50:13,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:50:13,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:50:13,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092679183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:50:13,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:50:13,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-06-06 00:50:13,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11020402] [2021-06-06 00:50:13,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:50:13,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:50:13,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:50:13,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:50:13,253 INFO L87 Difference]: Start difference. First operand 163503 states and 766511 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:50:15,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:50:15,340 INFO L93 Difference]: Finished difference Result 176174 states and 819037 transitions. [2021-06-06 00:50:15,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:50:15,341 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-06 00:50:15,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:50:16,142 INFO L225 Difference]: With dead ends: 176174 [2021-06-06 00:50:16,142 INFO L226 Difference]: Without dead ends: 175687 [2021-06-06 00:50:16,142 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 141.1ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:50:16,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175687 states. [2021-06-06 00:50:19,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175687 to 165082. [2021-06-06 00:50:19,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165082 states, 165081 states have (on average 4.68841356667333) internal successors, (773968), 165081 states have internal predecessors, (773968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:50:20,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165082 states to 165082 states and 773968 transitions. [2021-06-06 00:50:20,699 INFO L78 Accepts]: Start accepts. Automaton has 165082 states and 773968 transitions. Word has length 27 [2021-06-06 00:50:20,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:50:20,699 INFO L482 AbstractCegarLoop]: Abstraction has 165082 states and 773968 transitions. [2021-06-06 00:50:20,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:50:20,699 INFO L276 IsEmpty]: Start isEmpty. Operand 165082 states and 773968 transitions. [2021-06-06 00:50:21,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:50:21,732 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:50:21,732 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:50:21,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-06 00:50:21,932 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:50:21,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:50:21,932 INFO L82 PathProgramCache]: Analyzing trace with hash 718185300, now seen corresponding path program 31 times [2021-06-06 00:50:21,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:50:21,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997564520] [2021-06-06 00:50:21,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:50:21,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:50:22,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:50:22,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:50:22,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997564520] [2021-06-06 00:50:22,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997564520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:50:22,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332223042] [2021-06-06 00:50:22,002 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 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 [2021-06-06 00:50:22,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:50:22,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-06 00:50:22,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:50:22,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:50:22,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332223042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:50:22,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:50:22,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:50:22,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681815681] [2021-06-06 00:50:22,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:50:22,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:50:22,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:50:22,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:50:22,122 INFO L87 Difference]: Start difference. First operand 165082 states and 773968 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:50:24,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:50:24,153 INFO L93 Difference]: Finished difference Result 206400 states and 959680 transitions. [2021-06-06 00:50:24,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:50:24,154 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-06 00:50:24,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:50:24,918 INFO L225 Difference]: With dead ends: 206400 [2021-06-06 00:50:24,918 INFO L226 Difference]: Without dead ends: 206077 [2021-06-06 00:50:24,918 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 184.9ms TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:50:25,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206077 states. Received shutdown request... [2021-06-06 00:50:26,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:50:26,598 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-06 00:50:26,599 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-06 00:50:26,601 WARN L196 ceAbstractionStarter]: Timeout [2021-06-06 00:50:26,602 INFO L202 PluginConnector]: Adding new model hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.06 12:50:26 BasicIcfg [2021-06-06 00:50:26,602 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-06 00:50:26,602 INFO L168 Benchmark]: Toolchain (without parser) took 658379.05 ms. Allocated memory was 339.7 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 319.1 MB in the beginning and 11.5 GB in the end (delta: -11.2 GB). Peak memory consumption was 4.5 GB. Max. memory is 16.0 GB. [2021-06-06 00:50:26,602 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 339.7 MB. Free memory was 320.3 MB in the beginning and 320.2 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-06 00:50:26,603 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.01 ms. Allocated memory is still 339.7 MB. Free memory was 319.1 MB in the beginning and 317.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-06 00:50:26,604 INFO L168 Benchmark]: Boogie Preprocessor took 17.79 ms. Allocated memory is still 339.7 MB. Free memory was 317.6 MB in the beginning and 316.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-06 00:50:26,604 INFO L168 Benchmark]: RCFGBuilder took 249.30 ms. Allocated memory is still 339.7 MB. Free memory was 316.5 MB in the beginning and 303.0 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-06 00:50:26,604 INFO L168 Benchmark]: TraceAbstraction took 658084.32 ms. Allocated memory was 339.7 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 302.5 MB in the beginning and 11.5 GB in the end (delta: -11.2 GB). Peak memory consumption was 4.5 GB. Max. memory is 16.0 GB. [2021-06-06 00:50:26,605 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 0.10 ms. Allocated memory is still 339.7 MB. Free memory was 320.3 MB in the beginning and 320.2 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.01 ms. Allocated memory is still 339.7 MB. Free memory was 319.1 MB in the beginning and 317.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.79 ms. Allocated memory is still 339.7 MB. Free memory was 317.6 MB in the beginning and 316.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 249.30 ms. Allocated memory is still 339.7 MB. Free memory was 316.5 MB in the beginning and 303.0 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 658084.32 ms. Allocated memory was 339.7 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 302.5 MB in the beginning and 11.5 GB in the end (delta: -11.2 GB). Peak memory consumption was 4.5 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 50 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 657936.7ms, OverallIterations: 134, TraceHistogramMax: 3, EmptinessCheckTime: 43212.4ms, AutomataDifference: 205259.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 51.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7351 SDtfs, 15782 SDslu, 29301 SDs, 0 SdLazy, 31085 SolverSat, 4561 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13598.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4441 GetRequests, 2674 SyntacticMatches, 281 SemanticMatches, 1486 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5987 ImplicationChecksByTransitivity, 10927.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=181308occurred in iteration=69, InterpolantAutomatonStates: 1566, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 363820.6ms AutomataMinimizationTime, 134 MinimizatonAttempts, 1778404 StatesRemovedByMinimization, 133 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 488.8ms SsaConstructionTime, 1369.2ms SatisfiabilityAnalysisTime, 13729.2ms InterpolantComputationTime, 6504 NumberOfCodeBlocks, 6499 NumberOfCodeBlocksAsserted, 377 NumberOfCheckSat, 6244 ConstructedInterpolants, 0 QuantifiedInterpolants, 31335 SizeOfPredicates, 144 NumberOfNonLiveVariables, 8968 ConjunctsInSsa, 1360 ConjunctsInUnsatCore, 260 InterpolantComputations, 10 PerfectInterpolantSequences, 243/1064 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 !SESSION 2021-06-06 00:39:26.805 ----------------------------------------------- eclipse.buildId=unknown java.version=11.0.11 java.vendor=Debian BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US Framework arguments: -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/test/hard1.wvr.bpl Command-line arguments: -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/test/hard1.wvr.bpl !ENTRY org.eclipse.osgi 4 0 2021-06-06 00:50:26.850 !MESSAGE Application error !STACK 1 org.eclipse.core.internal.resources.ResourceException(/)[568]: java.io.FileNotFoundException: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21a930487/.metadata/.plugins/org.eclipse.core.resources/.root/1.tree (No such file or directory) at java.base/java.io.FileOutputStream.open0(Native Method) at java.base/java.io.FileOutputStream.open(FileOutputStream.java:298) at java.base/java.io.FileOutputStream.(FileOutputStream.java:237) at java.base/java.io.FileOutputStream.(FileOutputStream.java:187) at org.eclipse.core.internal.localstore.SafeFileOutputStream.(SafeFileOutputStream.java:55) at org.eclipse.core.internal.resources.SaveManager.saveTree(SaveManager.java:1381) at org.eclipse.core.internal.resources.SaveManager.save(SaveManager.java:1168) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2333) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2322) at de.uni_freiburg.informatik.ultimate.core.coreplugin.UltimateCore.start(UltimateCore.java:191) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:657) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:594) at org.eclipse.equinox.launcher.Main.run(Main.java:1465) at org.eclipse.equinox.launcher.Main.main(Main.java:1438)