/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/popl20-more/buffer-series.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 06:20:55,852 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 06:20:55,853 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 06:20:55,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 06:20:55,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 06:20:55,880 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 06:20:55,883 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 06:20:55,888 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 06:20:55,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 06:20:55,893 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 06:20:55,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 06:20:55,912 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 06:20:55,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 06:20:55,913 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 06:20:55,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 06:20:55,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 06:20:55,916 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 06:20:55,917 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 06:20:55,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 06:20:55,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 06:20:55,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 06:20:55,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 06:20:55,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 06:20:55,928 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 06:20:55,930 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-05 06:20:55,931 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-05 06:20:55,931 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-05 06:20:55,932 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-05 06:20:55,932 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-05 06:20:55,933 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-05 06:20:55,933 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 06:20:55,933 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 06:20:55,934 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 06:20:55,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 06:20:55,935 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 06:20:55,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 06:20:55,936 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 06:20:55,936 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 06:20:55,936 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 06:20:55,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 06:20:55,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 06:20:55,940 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 [2021-06-05 06:20:55,955 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 06:20:55,955 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 06:20:55,956 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 06:20:55,956 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 06:20:55,956 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 06:20:55,956 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 06:20:55,957 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 06:20:55,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 06:20:55,957 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 06:20:55,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 06:20:55,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 06:20:55,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 06:20:55,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 06:20:55,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 06:20:55,957 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 06:20:55,957 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 06:20:55,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 06:20:55,958 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 06:20:55,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 06:20:55,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 06:20:55,958 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 06:20:55,958 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 06:20:55,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 06:20:55,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 06:20:55,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 06:20:55,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 06:20:55,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 06:20:55,959 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 06:20:55,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 06:20:55,959 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 06:20:55,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 06:20:55,959 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 06:20:56,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 06:20:56,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 06:20:56,192 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 06:20:56,193 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 06:20:56,194 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 06:20:56,194 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series.wvr.bpl [2021-06-05 06:20:56,195 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series.wvr.bpl' [2021-06-05 06:20:56,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 06:20:56,653 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 06:20:56,653 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 06:20:56,653 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 06:20:56,654 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 06:20:56,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:20:56" (1/1) ... [2021-06-05 06:20:56,666 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:20:56" (1/1) ... [2021-06-05 06:20:56,671 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 06:20:56,672 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 06:20:56,672 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 06:20:56,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 06:20:56,676 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:20:56" (1/1) ... [2021-06-05 06:20:56,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:20:56" (1/1) ... [2021-06-05 06:20:56,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:20:56" (1/1) ... [2021-06-05 06:20:56,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:20:56" (1/1) ... [2021-06-05 06:20:56,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:20:56" (1/1) ... [2021-06-05 06:20:56,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:20:56" (1/1) ... [2021-06-05 06:20:56,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:20:56" (1/1) ... [2021-06-05 06:20:56,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 06:20:56,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 06:20:56,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 06:20:56,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 06:20:56,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:20:56" (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 [2021-06-05 06:20:56,732 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 06:20:56,732 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 06:20:56,732 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 06:20:56,733 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 06:20:56,733 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 06:20:56,733 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 06:20:56,733 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 06:20:56,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 06:20:56,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 06:20:56,733 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 06:20:56,734 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 06:20:56,735 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 06:20:56,735 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 06:20:56,735 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 06:20:56,735 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 06:20:56,735 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 06:20:56,890 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 06:20:56,890 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 06:20:56,891 INFO L202 PluginConnector]: Adding new model buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:20:56 BoogieIcfgContainer [2021-06-05 06:20:56,891 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 06:20:56,892 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 06:20:56,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 06:20:56,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 06:20:56,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:20:56" (1/2) ... [2021-06-05 06:20:56,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d78940 and model type buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:20:56, skipping insertion in model container [2021-06-05 06:20:56,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:20:56" (2/2) ... [2021-06-05 06:20:56,896 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-series.wvr.bpl [2021-06-05 06:20:56,899 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 06:20:56,899 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 06:20:56,900 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 06:20:56,900 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 06:20:56,936 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 06:20:56,948 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 06:20:56,960 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 06:20:56,960 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 06:20:56,960 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 06:20:56,960 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 06:20:56,960 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 06:20:56,960 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 06:20:56,960 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 06:20:56,960 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 06:20:56,966 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-06-05 06:20:57,048 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:57,053 INFO L276 IsEmpty]: Start isEmpty. Operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:57,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 06:20:57,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:57,075 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:57,075 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:57,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:57,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1591089523, now seen corresponding path program 1 times [2021-06-05 06:20:57,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:57,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783038908] [2021-06-05 06:20:57,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:57,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:57,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:57,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783038908] [2021-06-05 06:20:57,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783038908] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:20:57,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:20:57,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 06:20:57,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118829311] [2021-06-05 06:20:57,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 06:20:57,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:57,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 06:20:57,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:20:57,257 INFO L87 Difference]: Start difference. First operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 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) [2021-06-05 06:20:57,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:57,306 INFO L93 Difference]: Finished difference Result 1236 states and 4843 transitions. [2021-06-05 06:20:57,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 06:20:57,308 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 [2021-06-05 06:20:57,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:57,334 INFO L225 Difference]: With dead ends: 1236 [2021-06-05 06:20:57,335 INFO L226 Difference]: Without dead ends: 1109 [2021-06-05 06:20:57,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:20:57,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-06-05 06:20:57,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 866. [2021-06-05 06:20:57,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.910982658959538) internal successors, (3383), 865 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:57,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 3383 transitions. [2021-06-05 06:20:57,431 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 3383 transitions. Word has length 19 [2021-06-05 06:20:57,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:57,432 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 3383 transitions. [2021-06-05 06:20:57,432 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) [2021-06-05 06:20:57,433 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 3383 transitions. [2021-06-05 06:20:57,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:20:57,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:57,437 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:57,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 06:20:57,437 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:57,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:57,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1256412427, now seen corresponding path program 1 times [2021-06-05 06:20:57,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:57,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770363660] [2021-06-05 06:20:57,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:57,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:57,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:57,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770363660] [2021-06-05 06:20:57,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770363660] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:20:57,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:20:57,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:20:57,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139989322] [2021-06-05 06:20:57,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:20:57,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:57,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:20:57,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:20:57,521 INFO L87 Difference]: Start difference. First operand 866 states and 3383 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2021-06-05 06:20:57,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:57,572 INFO L93 Difference]: Finished difference Result 1524 states and 5641 transitions. [2021-06-05 06:20:57,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 06:20:57,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 [2021-06-05 06:20:57,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:57,580 INFO L225 Difference]: With dead ends: 1524 [2021-06-05 06:20:57,580 INFO L226 Difference]: Without dead ends: 1418 [2021-06-05 06:20:57,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:20:57,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-06-05 06:20:57,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1170. [2021-06-05 06:20:57,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 3.888793840889649) internal successors, (4546), 1169 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:57,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 4546 transitions. [2021-06-05 06:20:57,619 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 4546 transitions. Word has length 21 [2021-06-05 06:20:57,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:57,619 INFO L482 AbstractCegarLoop]: Abstraction has 1170 states and 4546 transitions. [2021-06-05 06:20:57,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2021-06-05 06:20:57,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 4546 transitions. [2021-06-05 06:20:57,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:20:57,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:57,624 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:57,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 06:20:57,625 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:57,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:57,626 INFO L82 PathProgramCache]: Analyzing trace with hash -898961871, now seen corresponding path program 1 times [2021-06-05 06:20:57,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:57,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210309497] [2021-06-05 06:20:57,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:57,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:57,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:57,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210309497] [2021-06-05 06:20:57,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210309497] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:20:57,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:20:57,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:20:57,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537631276] [2021-06-05 06:20:57,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:20:57,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:57,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:20:57,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:20:57,684 INFO L87 Difference]: Start difference. First operand 1170 states and 4546 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2021-06-05 06:20:57,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:57,729 INFO L93 Difference]: Finished difference Result 2017 states and 7510 transitions. [2021-06-05 06:20:57,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 06:20:57,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 [2021-06-05 06:20:57,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:57,743 INFO L225 Difference]: With dead ends: 2017 [2021-06-05 06:20:57,744 INFO L226 Difference]: Without dead ends: 1875 [2021-06-05 06:20:57,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:20:57,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-06-05 06:20:57,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1656. [2021-06-05 06:20:57,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.8676737160120847) internal successors, (6401), 1655 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:57,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 6401 transitions. [2021-06-05 06:20:57,797 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 6401 transitions. Word has length 21 [2021-06-05 06:20:57,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:57,797 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 6401 transitions. [2021-06-05 06:20:57,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2021-06-05 06:20:57,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 6401 transitions. [2021-06-05 06:20:57,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:20:57,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:57,804 INFO L521 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] [2021-06-05 06:20:57,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 06:20:57,804 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:57,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:57,804 INFO L82 PathProgramCache]: Analyzing trace with hash 100882901, now seen corresponding path program 1 times [2021-06-05 06:20:57,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:57,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078896754] [2021-06-05 06:20:57,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:57,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:57,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:20:57,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:57,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078896754] [2021-06-05 06:20:57,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078896754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:57,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671008954] [2021-06-05 06:20:57,838 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 [2021-06-05 06:20:57,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:57,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 06:20:57,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:20:58,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671008954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:58,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:58,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-06-05 06:20:58,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496818959] [2021-06-05 06:20:58,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:20:58,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:58,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:20:58,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:20:58,031 INFO L87 Difference]: Start difference. First operand 1656 states and 6401 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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) [2021-06-05 06:20:58,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:58,121 INFO L93 Difference]: Finished difference Result 2308 states and 8261 transitions. [2021-06-05 06:20:58,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:20:58,122 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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 24 [2021-06-05 06:20:58,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:58,130 INFO L225 Difference]: With dead ends: 2308 [2021-06-05 06:20:58,130 INFO L226 Difference]: Without dead ends: 2108 [2021-06-05 06:20:58,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:20:58,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-06-05 06:20:58,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1456. [2021-06-05 06:20:58,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.777319587628866) internal successors, (5496), 1455 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:58,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5496 transitions. [2021-06-05 06:20:58,165 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5496 transitions. Word has length 24 [2021-06-05 06:20:58,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:58,165 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 5496 transitions. [2021-06-05 06:20:58,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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) [2021-06-05 06:20:58,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5496 transitions. [2021-06-05 06:20:58,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:20:58,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:58,169 INFO L521 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] [2021-06-05 06:20:58,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:58,386 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:58,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:58,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1771388146, now seen corresponding path program 1 times [2021-06-05 06:20:58,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:58,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823269313] [2021-06-05 06:20:58,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:58,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:20:58,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:58,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823269313] [2021-06-05 06:20:58,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823269313] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:20:58,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:20:58,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:20:58,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627440489] [2021-06-05 06:20:58,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:20:58,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:58,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:20:58,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:20:58,409 INFO L87 Difference]: Start difference. First operand 1456 states and 5496 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:58,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:58,472 INFO L93 Difference]: Finished difference Result 1950 states and 6936 transitions. [2021-06-05 06:20:58,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 06:20:58,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:20:58,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:58,480 INFO L225 Difference]: With dead ends: 1950 [2021-06-05 06:20:58,480 INFO L226 Difference]: Without dead ends: 1860 [2021-06-05 06:20:58,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:20:58,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-06-05 06:20:58,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1544. [2021-06-05 06:20:58,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.725210628645496) internal successors, (5748), 1543 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:58,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5748 transitions. [2021-06-05 06:20:58,517 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5748 transitions. Word has length 24 [2021-06-05 06:20:58,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:58,517 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 5748 transitions. [2021-06-05 06:20:58,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:58,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5748 transitions. [2021-06-05 06:20:58,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:20:58,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:58,520 INFO L521 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] [2021-06-05 06:20:58,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 06:20:58,520 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:58,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:58,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2115354510, now seen corresponding path program 2 times [2021-06-05 06:20:58,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:58,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432987396] [2021-06-05 06:20:58,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:58,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:20:58,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:58,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432987396] [2021-06-05 06:20:58,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432987396] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:20:58,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:20:58,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:20:58,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741547927] [2021-06-05 06:20:58,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:20:58,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:58,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:20:58,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:20:58,541 INFO L87 Difference]: Start difference. First operand 1544 states and 5748 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:58,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:58,593 INFO L93 Difference]: Finished difference Result 1308 states and 4722 transitions. [2021-06-05 06:20:58,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 06:20:58,593 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:20:58,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:58,598 INFO L225 Difference]: With dead ends: 1308 [2021-06-05 06:20:58,598 INFO L226 Difference]: Without dead ends: 1308 [2021-06-05 06:20:58,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:20:58,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-06-05 06:20:58,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1118. [2021-06-05 06:20:58,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.6499552372426143) internal successors, (4077), 1117 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:58,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4077 transitions. [2021-06-05 06:20:58,622 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4077 transitions. Word has length 24 [2021-06-05 06:20:58,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:58,622 INFO L482 AbstractCegarLoop]: Abstraction has 1118 states and 4077 transitions. [2021-06-05 06:20:58,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:58,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4077 transitions. [2021-06-05 06:20:58,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:20:58,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:58,625 INFO L521 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] [2021-06-05 06:20:58,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 06:20:58,625 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:58,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:58,626 INFO L82 PathProgramCache]: Analyzing trace with hash 373109395, now seen corresponding path program 2 times [2021-06-05 06:20:58,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:58,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361801448] [2021-06-05 06:20:58,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:20:58,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:58,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361801448] [2021-06-05 06:20:58,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361801448] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:20:58,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:20:58,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:20:58,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468624322] [2021-06-05 06:20:58,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:20:58,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:58,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:20:58,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:20:58,674 INFO L87 Difference]: Start difference. First operand 1118 states and 4077 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:58,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:58,710 INFO L93 Difference]: Finished difference Result 1142 states and 4135 transitions. [2021-06-05 06:20:58,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 06:20:58,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:20:58,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:58,715 INFO L225 Difference]: With dead ends: 1142 [2021-06-05 06:20:58,716 INFO L226 Difference]: Without dead ends: 1120 [2021-06-05 06:20:58,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:20:58,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-06-05 06:20:58,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1104. [2021-06-05 06:20:58,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 3.665457842248413) internal successors, (4043), 1103 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:58,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 4043 transitions. [2021-06-05 06:20:58,754 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 4043 transitions. Word has length 24 [2021-06-05 06:20:58,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:58,754 INFO L482 AbstractCegarLoop]: Abstraction has 1104 states and 4043 transitions. [2021-06-05 06:20:58,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:58,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 4043 transitions. [2021-06-05 06:20:58,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:20:58,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:58,757 INFO L521 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] [2021-06-05 06:20:58,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 06:20:58,757 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:58,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:58,758 INFO L82 PathProgramCache]: Analyzing trace with hash -896204878, now seen corresponding path program 1 times [2021-06-05 06:20:58,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:58,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527130626] [2021-06-05 06:20:58,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:58,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:20:58,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:58,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527130626] [2021-06-05 06:20:58,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527130626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:58,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860961389] [2021-06-05 06:20:58,799 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 [2021-06-05 06:20:58,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:58,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 06:20:58,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:20:58,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860961389] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:20:58,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 06:20:58,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-06-05 06:20:58,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561846355] [2021-06-05 06:20:58,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:20:58,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:58,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:20:58,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:20:58,910 INFO L87 Difference]: Start difference. First operand 1104 states and 4043 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2021-06-05 06:20:58,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:58,927 INFO L93 Difference]: Finished difference Result 1344 states and 4969 transitions. [2021-06-05 06:20:58,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 06:20:58,928 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 [2021-06-05 06:20:58,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:58,934 INFO L225 Difference]: With dead ends: 1344 [2021-06-05 06:20:58,934 INFO L226 Difference]: Without dead ends: 1344 [2021-06-05 06:20:58,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:20:58,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-06-05 06:20:58,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 926. [2021-06-05 06:20:58,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.6324324324324326) internal successors, (3360), 925 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:58,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3360 transitions. [2021-06-05 06:20:58,956 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3360 transitions. Word has length 27 [2021-06-05 06:20:58,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:58,957 INFO L482 AbstractCegarLoop]: Abstraction has 926 states and 3360 transitions. [2021-06-05 06:20:58,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2021-06-05 06:20:58,957 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3360 transitions. [2021-06-05 06:20:58,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:20:58,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:58,961 INFO L521 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] [2021-06-05 06:20:59,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:59,169 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:59,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:59,169 INFO L82 PathProgramCache]: Analyzing trace with hash 591603758, now seen corresponding path program 1 times [2021-06-05 06:20:59,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:59,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665413060] [2021-06-05 06:20:59,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:20:59,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:59,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665413060] [2021-06-05 06:20:59,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665413060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:59,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676530081] [2021-06-05 06:20:59,184 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 [2021-06-05 06:20:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:59,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 06:20:59,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:59,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:20:59,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676530081] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:20:59,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 06:20:59,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-06-05 06:20:59,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018970471] [2021-06-05 06:20:59,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:20:59,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:59,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:20:59,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:20:59,246 INFO L87 Difference]: Start difference. First operand 926 states and 3360 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2021-06-05 06:20:59,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:59,261 INFO L93 Difference]: Finished difference Result 1608 states and 5808 transitions. [2021-06-05 06:20:59,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 06:20:59,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 [2021-06-05 06:20:59,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:59,268 INFO L225 Difference]: With dead ends: 1608 [2021-06-05 06:20:59,268 INFO L226 Difference]: Without dead ends: 1608 [2021-06-05 06:20:59,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:20:59,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2021-06-05 06:20:59,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1079. [2021-06-05 06:20:59,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1078 states have (on average 3.6614100185528757) internal successors, (3947), 1078 states have internal predecessors, (3947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:59,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 3947 transitions. [2021-06-05 06:20:59,291 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 3947 transitions. Word has length 27 [2021-06-05 06:20:59,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:59,291 INFO L482 AbstractCegarLoop]: Abstraction has 1079 states and 3947 transitions. [2021-06-05 06:20:59,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2021-06-05 06:20:59,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 3947 transitions. [2021-06-05 06:20:59,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:20:59,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:59,293 INFO L521 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, 1, 1] [2021-06-05 06:20:59,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:59,509 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:59,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:59,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1107902640, now seen corresponding path program 1 times [2021-06-05 06:20:59,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:59,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69949807] [2021-06-05 06:20:59,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:59,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:59,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:59,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69949807] [2021-06-05 06:20:59,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69949807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:59,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006758297] [2021-06-05 06:20:59,648 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 [2021-06-05 06:20:59,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:59,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:20:59,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:59,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 06:20:59,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:59,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:59,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:20:59,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 06:20:59,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 06:20:59,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:59,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:59,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:20:59,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-06-05 06:20:59,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:59,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006758297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:59,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:59,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 06:20:59,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589886059] [2021-06-05 06:20:59,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:20:59,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:59,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:20:59,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:20:59,829 INFO L87 Difference]: Start difference. First operand 1079 states and 3947 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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) [2021-06-05 06:21:00,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:00,009 INFO L93 Difference]: Finished difference Result 2484 states and 9306 transitions. [2021-06-05 06:21:00,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:21:00,009 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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 29 [2021-06-05 06:21:00,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:00,018 INFO L225 Difference]: With dead ends: 2484 [2021-06-05 06:21:00,018 INFO L226 Difference]: Without dead ends: 2405 [2021-06-05 06:21:00,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:21:00,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-06-05 06:21:00,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1615. [2021-06-05 06:21:00,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1615 states, 1614 states have (on average 3.7360594795539033) internal successors, (6030), 1614 states have internal predecessors, (6030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:00,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 6030 transitions. [2021-06-05 06:21:00,057 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 6030 transitions. Word has length 29 [2021-06-05 06:21:00,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:00,057 INFO L482 AbstractCegarLoop]: Abstraction has 1615 states and 6030 transitions. [2021-06-05 06:21:00,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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) [2021-06-05 06:21:00,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 6030 transitions. [2021-06-05 06:21:00,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:21:00,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:00,061 INFO L521 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, 1, 1] [2021-06-05 06:21:00,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:00,281 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:00,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:00,281 INFO L82 PathProgramCache]: Analyzing trace with hash -769853710, now seen corresponding path program 2 times [2021-06-05 06:21:00,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:00,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400955505] [2021-06-05 06:21:00,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:00,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:00,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:00,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400955505] [2021-06-05 06:21:00,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400955505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:00,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176734109] [2021-06-05 06:21:00,417 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) [2021-06-05 06:21:00,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:21:00,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:00,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:21:00,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:00,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 06:21:00,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:00,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:00,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:00,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 06:21:00,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 06:21:00,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:00,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:00,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:00,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-06-05 06:21:00,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:00,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176734109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:00,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:00,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 06:21:00,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945794816] [2021-06-05 06:21:00,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:21:00,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:00,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:21:00,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:21:00,576 INFO L87 Difference]: Start difference. First operand 1615 states and 6030 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:00,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:00,732 INFO L93 Difference]: Finished difference Result 2581 states and 9696 transitions. [2021-06-05 06:21:00,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:21:00,732 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:21:00,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:00,739 INFO L225 Difference]: With dead ends: 2581 [2021-06-05 06:21:00,739 INFO L226 Difference]: Without dead ends: 2502 [2021-06-05 06:21:00,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:21:00,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2502 states. [2021-06-05 06:21:00,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2502 to 1741. [2021-06-05 06:21:00,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1740 states have (on average 3.7379310344827585) internal successors, (6504), 1740 states have internal predecessors, (6504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:00,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 6504 transitions. [2021-06-05 06:21:00,786 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 6504 transitions. Word has length 29 [2021-06-05 06:21:00,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:00,787 INFO L482 AbstractCegarLoop]: Abstraction has 1741 states and 6504 transitions. [2021-06-05 06:21:00,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:00,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 6504 transitions. [2021-06-05 06:21:00,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:21:00,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:00,791 INFO L521 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, 1, 1] [2021-06-05 06:21:00,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 06:21:00,997 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:00,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:00,997 INFO L82 PathProgramCache]: Analyzing trace with hash 720950344, now seen corresponding path program 3 times [2021-06-05 06:21:00,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:00,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5051996] [2021-06-05 06:21:00,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:01,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:01,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:01,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5051996] [2021-06-05 06:21:01,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5051996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:01,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085795106] [2021-06-05 06:21:01,096 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 [2021-06-05 06:21:01,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:21:01,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:01,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:21:01,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:01,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 06:21:01,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:01,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:01,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:01,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2021-06-05 06:21:01,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 06:21:01,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:01,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:01,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:01,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:7 [2021-06-05 06:21:01,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:01,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085795106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:01,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:01,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 06:21:01,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911627723] [2021-06-05 06:21:01,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:21:01,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:01,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:21:01,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:21:01,260 INFO L87 Difference]: Start difference. First operand 1741 states and 6504 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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) [2021-06-05 06:21:01,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:01,421 INFO L93 Difference]: Finished difference Result 3043 states and 11434 transitions. [2021-06-05 06:21:01,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:21:01,421 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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 29 [2021-06-05 06:21:01,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:01,429 INFO L225 Difference]: With dead ends: 3043 [2021-06-05 06:21:01,429 INFO L226 Difference]: Without dead ends: 2964 [2021-06-05 06:21:01,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 126.8ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:21:01,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2964 states. [2021-06-05 06:21:01,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2964 to 1837. [2021-06-05 06:21:01,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 3.7265795206971677) internal successors, (6842), 1836 states have internal predecessors, (6842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:01,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 6842 transitions. [2021-06-05 06:21:01,468 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 6842 transitions. Word has length 29 [2021-06-05 06:21:01,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:01,468 INFO L482 AbstractCegarLoop]: Abstraction has 1837 states and 6842 transitions. [2021-06-05 06:21:01,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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) [2021-06-05 06:21:01,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 6842 transitions. [2021-06-05 06:21:01,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:21:01,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:01,472 INFO L521 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, 1, 1] [2021-06-05 06:21:01,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:01,687 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:01,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:01,688 INFO L82 PathProgramCache]: Analyzing trace with hash -949623576, now seen corresponding path program 4 times [2021-06-05 06:21:01,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:01,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737810877] [2021-06-05 06:21:01,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:01,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:01,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:01,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:01,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737810877] [2021-06-05 06:21:01,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737810877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:01,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241048954] [2021-06-05 06:21:01,818 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 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 [2021-06-05 06:21:01,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:21:01,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:01,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:21:01,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:01,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 06:21:01,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:01,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:01,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:01,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 06:21:01,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 06:21:01,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:01,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:01,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:01,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-06-05 06:21:01,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:01,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241048954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:01,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:01,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 06:21:01,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414689343] [2021-06-05 06:21:01,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:21:01,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:01,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:21:01,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:21:01,940 INFO L87 Difference]: Start difference. First operand 1837 states and 6842 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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) [2021-06-05 06:21:02,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:02,153 INFO L93 Difference]: Finished difference Result 3105 states and 11701 transitions. [2021-06-05 06:21:02,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 06:21:02,154 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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 29 [2021-06-05 06:21:02,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:02,162 INFO L225 Difference]: With dead ends: 3105 [2021-06-05 06:21:02,162 INFO L226 Difference]: Without dead ends: 3026 [2021-06-05 06:21:02,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 126.5ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:21:02,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2021-06-05 06:21:02,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 2051. [2021-06-05 06:21:02,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.7434146341463417) internal successors, (7674), 2050 states have internal predecessors, (7674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:02,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 7674 transitions. [2021-06-05 06:21:02,204 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 7674 transitions. Word has length 29 [2021-06-05 06:21:02,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:02,204 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 7674 transitions. [2021-06-05 06:21:02,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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) [2021-06-05 06:21:02,205 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 7674 transitions. [2021-06-05 06:21:02,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:21:02,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:02,208 INFO L521 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, 1, 1] [2021-06-05 06:21:02,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:02,421 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:02,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:02,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1467587370, now seen corresponding path program 5 times [2021-06-05 06:21:02,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:02,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307616044] [2021-06-05 06:21:02,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:02,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:02,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:02,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:02,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307616044] [2021-06-05 06:21:02,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307616044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:02,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087213160] [2021-06-05 06:21:02,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:02,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:21:02,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:02,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:21:02,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:02,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 06:21:02,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:02,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:02,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:02,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 06:21:02,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 06:21:02,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:02,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:02,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:02,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-06-05 06:21:02,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:02,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087213160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:02,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:02,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 06:21:02,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985465440] [2021-06-05 06:21:02,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:21:02,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:02,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:21:02,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:21:02,825 INFO L87 Difference]: Start difference. First operand 2051 states and 7674 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:03,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:03,021 INFO L93 Difference]: Finished difference Result 2933 states and 11023 transitions. [2021-06-05 06:21:03,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 06:21:03,021 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:21:03,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:03,028 INFO L225 Difference]: With dead ends: 2933 [2021-06-05 06:21:03,029 INFO L226 Difference]: Without dead ends: 2854 [2021-06-05 06:21:03,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 130.2ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:21:03,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-06-05 06:21:03,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 1852. [2021-06-05 06:21:03,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 3.731496488384657) internal successors, (6907), 1851 states have internal predecessors, (6907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:03,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 6907 transitions. [2021-06-05 06:21:03,067 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 6907 transitions. Word has length 29 [2021-06-05 06:21:03,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:03,068 INFO L482 AbstractCegarLoop]: Abstraction has 1852 states and 6907 transitions. [2021-06-05 06:21:03,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:03,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 6907 transitions. [2021-06-05 06:21:03,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:21:03,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:03,071 INFO L521 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, 1, 1] [2021-06-05 06:21:03,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 06:21:03,287 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:03,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:03,287 INFO L82 PathProgramCache]: Analyzing trace with hash -55564736, now seen corresponding path program 6 times [2021-06-05 06:21:03,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:03,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069540971] [2021-06-05 06:21:03,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:03,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:03,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:03,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:03,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069540971] [2021-06-05 06:21:03,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069540971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:03,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141648529] [2021-06-05 06:21:03,382 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 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 [2021-06-05 06:21:03,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:21:03,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:03,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:21:03,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:03,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 06:21:03,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:03,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:03,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:03,488 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2021-06-05 06:21:03,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 06:21:03,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:03,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:03,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:03,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:7 [2021-06-05 06:21:03,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:03,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141648529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:03,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:03,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 06:21:03,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117657697] [2021-06-05 06:21:03,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:21:03,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:03,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:21:03,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:21:03,554 INFO L87 Difference]: Start difference. First operand 1852 states and 6907 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:03,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:03,671 INFO L93 Difference]: Finished difference Result 2807 states and 10501 transitions. [2021-06-05 06:21:03,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:21:03,671 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:21:03,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:03,677 INFO L225 Difference]: With dead ends: 2807 [2021-06-05 06:21:03,677 INFO L226 Difference]: Without dead ends: 2728 [2021-06-05 06:21:03,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:21:03,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2021-06-05 06:21:03,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 1892. [2021-06-05 06:21:03,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.7223691168693813) internal successors, (7039), 1891 states have internal predecessors, (7039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:03,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 7039 transitions. [2021-06-05 06:21:03,714 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 7039 transitions. Word has length 29 [2021-06-05 06:21:03,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:03,715 INFO L482 AbstractCegarLoop]: Abstraction has 1892 states and 7039 transitions. [2021-06-05 06:21:03,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:03,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 7039 transitions. [2021-06-05 06:21:03,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:21:03,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:03,718 INFO L521 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, 1, 1, 1, 1] [2021-06-05 06:21:03,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 06:21:03,936 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:03,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:03,936 INFO L82 PathProgramCache]: Analyzing trace with hash -945078094, now seen corresponding path program 7 times [2021-06-05 06:21:03,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:03,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225199598] [2021-06-05 06:21:03,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:21:03,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:03,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225199598] [2021-06-05 06:21:03,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225199598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:03,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988577106] [2021-06-05 06:21:03,958 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 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 [2021-06-05 06:21:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:03,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 06:21:03,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:04,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:21:04,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988577106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:04,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:04,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-06-05 06:21:04,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841500072] [2021-06-05 06:21:04,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:21:04,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:04,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:21:04,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:21:04,025 INFO L87 Difference]: Start difference. First operand 1892 states and 7039 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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) [2021-06-05 06:21:04,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:04,092 INFO L93 Difference]: Finished difference Result 3393 states and 12285 transitions. [2021-06-05 06:21:04,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:21:04,092 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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 31 [2021-06-05 06:21:04,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:04,098 INFO L225 Difference]: With dead ends: 3393 [2021-06-05 06:21:04,099 INFO L226 Difference]: Without dead ends: 3242 [2021-06-05 06:21:04,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:21:04,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2021-06-05 06:21:04,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 2725. [2021-06-05 06:21:04,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2724 states have (on average 3.752202643171806) internal successors, (10221), 2724 states have internal predecessors, (10221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:04,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 10221 transitions. [2021-06-05 06:21:04,145 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 10221 transitions. Word has length 31 [2021-06-05 06:21:04,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:04,145 INFO L482 AbstractCegarLoop]: Abstraction has 2725 states and 10221 transitions. [2021-06-05 06:21:04,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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) [2021-06-05 06:21:04,145 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 10221 transitions. [2021-06-05 06:21:04,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:21:04,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:04,150 INFO L521 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, 1, 1, 1, 1] [2021-06-05 06:21:04,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 06:21:04,368 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:04,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:04,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1385088466, now seen corresponding path program 8 times [2021-06-05 06:21:04,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:04,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357608257] [2021-06-05 06:21:04,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:04,398 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:21:04,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:04,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357608257] [2021-06-05 06:21:04,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357608257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:04,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171660473] [2021-06-05 06:21:04,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:21:04,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:21:04,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:04,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 06:21:04,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:04,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:21:04,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171660473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:04,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:04,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-06-05 06:21:04,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510351474] [2021-06-05 06:21:04,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:21:04,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:04,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:21:04,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:21:04,476 INFO L87 Difference]: Start difference. First operand 2725 states and 10221 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:04,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:04,539 INFO L93 Difference]: Finished difference Result 5257 states and 19424 transitions. [2021-06-05 06:21:04,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:21:04,539 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:21:04,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:04,548 INFO L225 Difference]: With dead ends: 5257 [2021-06-05 06:21:04,549 INFO L226 Difference]: Without dead ends: 5006 [2021-06-05 06:21:04,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:21:04,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5006 states. [2021-06-05 06:21:04,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5006 to 4359. [2021-06-05 06:21:04,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4359 states, 4358 states have (on average 3.8077099586966496) internal successors, (16594), 4358 states have internal predecessors, (16594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:04,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 16594 transitions. [2021-06-05 06:21:04,625 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 16594 transitions. Word has length 31 [2021-06-05 06:21:04,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:04,625 INFO L482 AbstractCegarLoop]: Abstraction has 4359 states and 16594 transitions. [2021-06-05 06:21:04,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:04,625 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 16594 transitions. [2021-06-05 06:21:04,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:21:04,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:04,655 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1] [2021-06-05 06:21:04,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 06:21:04,856 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:04,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:04,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1789712274, now seen corresponding path program 9 times [2021-06-05 06:21:04,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:04,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782415557] [2021-06-05 06:21:04,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:04,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:04,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 06:21:04,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:04,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782415557] [2021-06-05 06:21:04,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782415557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:04,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231815237] [2021-06-05 06:21:04,884 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 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 [2021-06-05 06:21:04,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:21:04,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:04,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:21:04,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:04,988 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 06:21:04,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231815237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:04,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:04,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 06:21:04,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133753019] [2021-06-05 06:21:04,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:21:04,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:04,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:21:04,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:21:04,989 INFO L87 Difference]: Start difference. First operand 4359 states and 16594 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:05,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:05,229 INFO L93 Difference]: Finished difference Result 16323 states and 59821 transitions. [2021-06-05 06:21:05,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:21:05,229 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:21:05,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:05,259 INFO L225 Difference]: With dead ends: 16323 [2021-06-05 06:21:05,260 INFO L226 Difference]: Without dead ends: 13965 [2021-06-05 06:21:05,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:21:05,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13965 states. [2021-06-05 06:21:05,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13965 to 7026. [2021-06-05 06:21:05,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7026 states, 7025 states have (on average 3.893523131672598) internal successors, (27352), 7025 states have internal predecessors, (27352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:05,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7026 states to 7026 states and 27352 transitions. [2021-06-05 06:21:05,447 INFO L78 Accepts]: Start accepts. Automaton has 7026 states and 27352 transitions. Word has length 34 [2021-06-05 06:21:05,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:05,447 INFO L482 AbstractCegarLoop]: Abstraction has 7026 states and 27352 transitions. [2021-06-05 06:21:05,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:05,447 INFO L276 IsEmpty]: Start isEmpty. Operand 7026 states and 27352 transitions. [2021-06-05 06:21:05,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:21:05,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:05,461 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1] [2021-06-05 06:21:05,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 06:21:05,679 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:05,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:05,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1811384725, now seen corresponding path program 10 times [2021-06-05 06:21:05,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:05,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141269247] [2021-06-05 06:21:05,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:05,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 06:21:05,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:05,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141269247] [2021-06-05 06:21:05,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141269247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:05,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99668204] [2021-06-05 06:21:05,712 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 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 [2021-06-05 06:21:05,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:21:05,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:05,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:21:05,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 06:21:05,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99668204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:05,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:05,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 06:21:05,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308462305] [2021-06-05 06:21:05,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:21:05,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:05,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:21:05,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:21:05,850 INFO L87 Difference]: Start difference. First operand 7026 states and 27352 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:06,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:06,198 INFO L93 Difference]: Finished difference Result 18970 states and 71100 transitions. [2021-06-05 06:21:06,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:21:06,198 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:21:06,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:06,236 INFO L225 Difference]: With dead ends: 18970 [2021-06-05 06:21:06,236 INFO L226 Difference]: Without dead ends: 18531 [2021-06-05 06:21:06,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:21:06,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18531 states. [2021-06-05 06:21:06,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18531 to 10689. [2021-06-05 06:21:06,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10689 states, 10688 states have (on average 3.994479790419162) internal successors, (42693), 10688 states have internal predecessors, (42693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:06,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10689 states to 10689 states and 42693 transitions. [2021-06-05 06:21:06,507 INFO L78 Accepts]: Start accepts. Automaton has 10689 states and 42693 transitions. Word has length 34 [2021-06-05 06:21:06,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:06,508 INFO L482 AbstractCegarLoop]: Abstraction has 10689 states and 42693 transitions. [2021-06-05 06:21:06,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:06,508 INFO L276 IsEmpty]: Start isEmpty. Operand 10689 states and 42693 transitions. [2021-06-05 06:21:06,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:21:06,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:06,527 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1] [2021-06-05 06:21:06,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:06,741 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:06,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:06,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1977044948, now seen corresponding path program 11 times [2021-06-05 06:21:06,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:06,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052529129] [2021-06-05 06:21:06,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:21:06,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:06,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052529129] [2021-06-05 06:21:06,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052529129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:06,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955778181] [2021-06-05 06:21:06,766 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 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 [2021-06-05 06:21:06,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:21:06,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:06,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:21:06,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:06,925 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:21:06,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955778181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:06,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:06,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 06:21:06,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523904171] [2021-06-05 06:21:06,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:21:06,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:06,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:21:06,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:21:06,926 INFO L87 Difference]: Start difference. First operand 10689 states and 42693 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:07,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:07,172 INFO L93 Difference]: Finished difference Result 18432 states and 70487 transitions. [2021-06-05 06:21:07,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:21:07,172 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:21:07,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:07,210 INFO L225 Difference]: With dead ends: 18432 [2021-06-05 06:21:07,210 INFO L226 Difference]: Without dead ends: 18354 [2021-06-05 06:21:07,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:21:07,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18354 states. [2021-06-05 06:21:07,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18354 to 10639. [2021-06-05 06:21:07,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10639 states, 10638 states have (on average 3.9989659710471894) internal successors, (42541), 10638 states have internal predecessors, (42541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:07,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10639 states to 10639 states and 42541 transitions. [2021-06-05 06:21:07,476 INFO L78 Accepts]: Start accepts. Automaton has 10639 states and 42541 transitions. Word has length 34 [2021-06-05 06:21:07,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:07,476 INFO L482 AbstractCegarLoop]: Abstraction has 10639 states and 42541 transitions. [2021-06-05 06:21:07,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:07,476 INFO L276 IsEmpty]: Start isEmpty. Operand 10639 states and 42541 transitions. [2021-06-05 06:21:07,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:21:07,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:07,495 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1] [2021-06-05 06:21:07,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:07,701 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:07,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:07,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1356082631, now seen corresponding path program 12 times [2021-06-05 06:21:07,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:07,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546056625] [2021-06-05 06:21:07,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:07,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:07,743 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:21:07,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:07,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546056625] [2021-06-05 06:21:07,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546056625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:07,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049362089] [2021-06-05 06:21:07,743 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 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 [2021-06-05 06:21:07,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:21:07,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:07,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:21:07,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:21:07,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049362089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:07,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:07,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 06:21:07,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47110914] [2021-06-05 06:21:07,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:21:07,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:07,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:21:07,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:21:07,835 INFO L87 Difference]: Start difference. First operand 10639 states and 42541 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:08,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:08,099 INFO L93 Difference]: Finished difference Result 20371 states and 77140 transitions. [2021-06-05 06:21:08,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:21:08,100 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:21:08,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:08,137 INFO L225 Difference]: With dead ends: 20371 [2021-06-05 06:21:08,137 INFO L226 Difference]: Without dead ends: 18706 [2021-06-05 06:21:08,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:21:08,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18706 states. [2021-06-05 06:21:08,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18706 to 13271. [2021-06-05 06:21:08,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13271 states, 13270 states have (on average 4.00783722682743) internal successors, (53184), 13270 states have internal predecessors, (53184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:08,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13271 states to 13271 states and 53184 transitions. [2021-06-05 06:21:08,427 INFO L78 Accepts]: Start accepts. Automaton has 13271 states and 53184 transitions. Word has length 34 [2021-06-05 06:21:08,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:08,427 INFO L482 AbstractCegarLoop]: Abstraction has 13271 states and 53184 transitions. [2021-06-05 06:21:08,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:08,427 INFO L276 IsEmpty]: Start isEmpty. Operand 13271 states and 53184 transitions. [2021-06-05 06:21:08,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:21:08,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:08,450 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1] [2021-06-05 06:21:08,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 06:21:08,653 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:08,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:08,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1475484620, now seen corresponding path program 13 times [2021-06-05 06:21:08,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:08,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596005236] [2021-06-05 06:21:08,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:08,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:08,676 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:21:08,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:08,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596005236] [2021-06-05 06:21:08,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596005236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:08,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514127716] [2021-06-05 06:21:08,677 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 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 [2021-06-05 06:21:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:08,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:21:08,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:21:08,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514127716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:08,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:08,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 06:21:08,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214158633] [2021-06-05 06:21:08,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:21:08,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:08,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:21:08,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:21:08,852 INFO L87 Difference]: Start difference. First operand 13271 states and 53184 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:09,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:09,145 INFO L93 Difference]: Finished difference Result 29290 states and 113267 transitions. [2021-06-05 06:21:09,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:21:09,145 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:21:09,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:09,206 INFO L225 Difference]: With dead ends: 29290 [2021-06-05 06:21:09,207 INFO L226 Difference]: Without dead ends: 27668 [2021-06-05 06:21:09,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:21:09,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27668 states. [2021-06-05 06:21:09,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27668 to 18232. [2021-06-05 06:21:09,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18232 states, 18231 states have (on average 4.042016345784653) internal successors, (73690), 18231 states have internal predecessors, (73690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:09,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18232 states to 18232 states and 73690 transitions. [2021-06-05 06:21:09,718 INFO L78 Accepts]: Start accepts. Automaton has 18232 states and 73690 transitions. Word has length 34 [2021-06-05 06:21:09,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:09,719 INFO L482 AbstractCegarLoop]: Abstraction has 18232 states and 73690 transitions. [2021-06-05 06:21:09,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:09,719 INFO L276 IsEmpty]: Start isEmpty. Operand 18232 states and 73690 transitions. [2021-06-05 06:21:09,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:21:09,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:09,750 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1] [2021-06-05 06:21:09,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:09,951 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:09,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:09,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1888062838, now seen corresponding path program 14 times [2021-06-05 06:21:09,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:09,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252356683] [2021-06-05 06:21:09,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:10,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:21:10,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:10,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252356683] [2021-06-05 06:21:10,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252356683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:10,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92936304] [2021-06-05 06:21:10,061 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 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 [2021-06-05 06:21:10,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:21:10,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:10,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:21:10,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:10,198 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:21:10,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92936304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:10,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:10,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 06:21:10,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594226991] [2021-06-05 06:21:10,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:21:10,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:10,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:21:10,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:21:10,199 INFO L87 Difference]: Start difference. First operand 18232 states and 73690 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:10,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:10,461 INFO L93 Difference]: Finished difference Result 27112 states and 106138 transitions. [2021-06-05 06:21:10,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:21:10,461 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:21:10,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:10,521 INFO L225 Difference]: With dead ends: 27112 [2021-06-05 06:21:10,522 INFO L226 Difference]: Without dead ends: 26976 [2021-06-05 06:21:10,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:21:10,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26976 states. [2021-06-05 06:21:10,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26976 to 18044. [2021-06-05 06:21:10,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18044 states, 18043 states have (on average 4.0432300615197025) internal successors, (72952), 18043 states have internal predecessors, (72952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:11,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18044 states to 18044 states and 72952 transitions. [2021-06-05 06:21:11,092 INFO L78 Accepts]: Start accepts. Automaton has 18044 states and 72952 transitions. Word has length 34 [2021-06-05 06:21:11,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:11,092 INFO L482 AbstractCegarLoop]: Abstraction has 18044 states and 72952 transitions. [2021-06-05 06:21:11,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:11,092 INFO L276 IsEmpty]: Start isEmpty. Operand 18044 states and 72952 transitions. [2021-06-05 06:21:11,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:21:11,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:11,132 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1] [2021-06-05 06:21:11,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 06:21:11,347 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:11,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:11,348 INFO L82 PathProgramCache]: Analyzing trace with hash -2054889942, now seen corresponding path program 15 times [2021-06-05 06:21:11,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:11,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498019195] [2021-06-05 06:21:11,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:11,378 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:21:11,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:11,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498019195] [2021-06-05 06:21:11,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498019195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:11,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115913337] [2021-06-05 06:21:11,378 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 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 [2021-06-05 06:21:11,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:21:11,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:11,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:21:11,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:11,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:21:11,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115913337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:11,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:11,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 06:21:11,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411567082] [2021-06-05 06:21:11,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:21:11,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:11,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:21:11,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:21:11,478 INFO L87 Difference]: Start difference. First operand 18044 states and 72952 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:11,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:11,799 INFO L93 Difference]: Finished difference Result 30228 states and 119473 transitions. [2021-06-05 06:21:11,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:21:11,800 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:21:11,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:11,871 INFO L225 Difference]: With dead ends: 30228 [2021-06-05 06:21:11,871 INFO L226 Difference]: Without dead ends: 30070 [2021-06-05 06:21:11,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:21:11,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30070 states. [2021-06-05 06:21:12,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30070 to 20840. [2021-06-05 06:21:12,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20840 states, 20839 states have (on average 4.074667690388214) internal successors, (84912), 20839 states have internal predecessors, (84912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:12,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20840 states to 20840 states and 84912 transitions. [2021-06-05 06:21:12,423 INFO L78 Accepts]: Start accepts. Automaton has 20840 states and 84912 transitions. Word has length 34 [2021-06-05 06:21:12,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:12,423 INFO L482 AbstractCegarLoop]: Abstraction has 20840 states and 84912 transitions. [2021-06-05 06:21:12,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:12,423 INFO L276 IsEmpty]: Start isEmpty. Operand 20840 states and 84912 transitions. [2021-06-05 06:21:12,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:21:12,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:12,458 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1] [2021-06-05 06:21:12,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 06:21:12,658 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:12,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:12,659 INFO L82 PathProgramCache]: Analyzing trace with hash 2024685389, now seen corresponding path program 16 times [2021-06-05 06:21:12,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:12,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689985169] [2021-06-05 06:21:12,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:12,681 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 06:21:12,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:12,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689985169] [2021-06-05 06:21:12,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689985169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:12,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259447074] [2021-06-05 06:21:12,681 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 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 [2021-06-05 06:21:12,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:21:12,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:12,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:21:12,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:21:12,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259447074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:12,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:12,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 06:21:12,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784777320] [2021-06-05 06:21:12,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:21:12,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:12,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:21:12,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:21:12,874 INFO L87 Difference]: Start difference. First operand 20840 states and 84912 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:13,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:13,222 INFO L93 Difference]: Finished difference Result 28338 states and 112394 transitions. [2021-06-05 06:21:13,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:21:13,223 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:21:13,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:13,291 INFO L225 Difference]: With dead ends: 28338 [2021-06-05 06:21:13,291 INFO L226 Difference]: Without dead ends: 28230 [2021-06-05 06:21:13,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:21:13,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28230 states. [2021-06-05 06:21:13,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28230 to 21970. [2021-06-05 06:21:13,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21970 states, 21969 states have (on average 4.097774136282944) internal successors, (90024), 21969 states have internal predecessors, (90024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:13,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21970 states to 21970 states and 90024 transitions. [2021-06-05 06:21:13,775 INFO L78 Accepts]: Start accepts. Automaton has 21970 states and 90024 transitions. Word has length 34 [2021-06-05 06:21:13,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:13,775 INFO L482 AbstractCegarLoop]: Abstraction has 21970 states and 90024 transitions. [2021-06-05 06:21:13,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:13,776 INFO L276 IsEmpty]: Start isEmpty. Operand 21970 states and 90024 transitions. [2021-06-05 06:21:13,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:21:13,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:13,812 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:14,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 06:21:14,013 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:14,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:14,013 INFO L82 PathProgramCache]: Analyzing trace with hash 31444491, now seen corresponding path program 17 times [2021-06-05 06:21:14,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:14,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806838452] [2021-06-05 06:21:14,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 06:21:14,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:14,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806838452] [2021-06-05 06:21:14,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806838452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:14,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434090270] [2021-06-05 06:21:14,033 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 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 [2021-06-05 06:21:14,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:21:14,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:14,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:21:14,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:14,108 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 06:21:14,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434090270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:14,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:14,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 06:21:14,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702471392] [2021-06-05 06:21:14,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:21:14,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:14,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:21:14,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:21:14,109 INFO L87 Difference]: Start difference. First operand 21970 states and 90024 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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) [2021-06-05 06:21:14,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:14,267 INFO L93 Difference]: Finished difference Result 29898 states and 123092 transitions. [2021-06-05 06:21:14,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 06:21:14,267 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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 37 [2021-06-05 06:21:14,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:14,524 INFO L225 Difference]: With dead ends: 29898 [2021-06-05 06:21:14,524 INFO L226 Difference]: Without dead ends: 29898 [2021-06-05 06:21:14,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:21:14,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29898 states. [2021-06-05 06:21:14,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29898 to 24224. [2021-06-05 06:21:15,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24224 states, 24223 states have (on average 4.093588737976304) internal successors, (99159), 24223 states have internal predecessors, (99159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:15,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24224 states to 24224 states and 99159 transitions. [2021-06-05 06:21:15,097 INFO L78 Accepts]: Start accepts. Automaton has 24224 states and 99159 transitions. Word has length 37 [2021-06-05 06:21:15,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:15,097 INFO L482 AbstractCegarLoop]: Abstraction has 24224 states and 99159 transitions. [2021-06-05 06:21:15,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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) [2021-06-05 06:21:15,097 INFO L276 IsEmpty]: Start isEmpty. Operand 24224 states and 99159 transitions. [2021-06-05 06:21:15,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:21:15,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:15,134 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:15,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 06:21:15,335 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:15,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:15,335 INFO L82 PathProgramCache]: Analyzing trace with hash -906169461, now seen corresponding path program 18 times [2021-06-05 06:21:15,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:15,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017809289] [2021-06-05 06:21:15,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:15,349 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 06:21:15,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:15,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017809289] [2021-06-05 06:21:15,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017809289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:15,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763895230] [2021-06-05 06:21:15,349 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 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 [2021-06-05 06:21:15,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:21:15,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:15,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:21:15,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 06:21:15,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763895230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:15,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:15,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 06:21:15,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481403866] [2021-06-05 06:21:15,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:21:15,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:15,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:21:15,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:21:15,423 INFO L87 Difference]: Start difference. First operand 24224 states and 99159 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 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) [2021-06-05 06:21:15,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:15,590 INFO L93 Difference]: Finished difference Result 37062 states and 153499 transitions. [2021-06-05 06:21:15,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 06:21:15,591 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 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 37 [2021-06-05 06:21:15,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:15,684 INFO L225 Difference]: With dead ends: 37062 [2021-06-05 06:21:15,684 INFO L226 Difference]: Without dead ends: 37062 [2021-06-05 06:21:15,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:21:15,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37062 states. [2021-06-05 06:21:16,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37062 to 34305. [2021-06-05 06:21:16,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34305 states, 34304 states have (on average 4.138496968283582) internal successors, (141967), 34304 states have internal predecessors, (141967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:16,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34305 states to 34305 states and 141967 transitions. [2021-06-05 06:21:16,547 INFO L78 Accepts]: Start accepts. Automaton has 34305 states and 141967 transitions. Word has length 37 [2021-06-05 06:21:16,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:16,547 INFO L482 AbstractCegarLoop]: Abstraction has 34305 states and 141967 transitions. [2021-06-05 06:21:16,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 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) [2021-06-05 06:21:16,547 INFO L276 IsEmpty]: Start isEmpty. Operand 34305 states and 141967 transitions. [2021-06-05 06:21:16,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:16,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:16,612 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:16,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 06:21:16,813 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:16,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:16,813 INFO L82 PathProgramCache]: Analyzing trace with hash -774251319, now seen corresponding path program 19 times [2021-06-05 06:21:16,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:16,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687169562] [2021-06-05 06:21:16,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:17,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:17,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687169562] [2021-06-05 06:21:17,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687169562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:17,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160553811] [2021-06-05 06:21:17,124 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 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 [2021-06-05 06:21:17,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:17,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:21:17,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:17,337 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:21:17,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:21:17,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:17,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:17,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:17,344 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 06:21:17,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 06:21:17,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:17,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:17,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:17,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-06-05 06:21:17,462 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:17,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160553811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:17,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:17,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 06:21:17,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441908873] [2021-06-05 06:21:17,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:21:17,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:17,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:21:17,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:21:17,463 INFO L87 Difference]: Start difference. First operand 34305 states and 141967 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:18,006 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-06-05 06:21:19,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:19,043 INFO L93 Difference]: Finished difference Result 68330 states and 281299 transitions. [2021-06-05 06:21:19,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:21:19,043 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:21:19,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:19,429 INFO L225 Difference]: With dead ends: 68330 [2021-06-05 06:21:19,430 INFO L226 Difference]: Without dead ends: 68275 [2021-06-05 06:21:19,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 888.6ms TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:21:19,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68275 states. [2021-06-05 06:21:20,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68275 to 35332. [2021-06-05 06:21:20,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35332 states, 35331 states have (on average 4.143075486117008) internal successors, (146379), 35331 states have internal predecessors, (146379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:20,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35332 states to 35332 states and 146379 transitions. [2021-06-05 06:21:20,336 INFO L78 Accepts]: Start accepts. Automaton has 35332 states and 146379 transitions. Word has length 39 [2021-06-05 06:21:20,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:20,336 INFO L482 AbstractCegarLoop]: Abstraction has 35332 states and 146379 transitions. [2021-06-05 06:21:20,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:20,336 INFO L276 IsEmpty]: Start isEmpty. Operand 35332 states and 146379 transitions. [2021-06-05 06:21:20,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:20,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:20,397 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:20,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:20,605 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:20,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:20,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1160268155, now seen corresponding path program 20 times [2021-06-05 06:21:20,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:20,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788856700] [2021-06-05 06:21:20,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:20,902 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:20,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:20,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788856700] [2021-06-05 06:21:20,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788856700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:20,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144044663] [2021-06-05 06:21:20,902 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 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 [2021-06-05 06:21:20,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:21:20,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:20,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:21:20,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:21,078 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:21:21,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:21:21,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:21,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:21,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:21,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 06:21:21,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:21:21,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:21,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:21,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:21,175 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:21:21,214 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:21,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144044663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:21,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:21,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:21:21,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049799788] [2021-06-05 06:21:21,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:21:21,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:21,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:21:21,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:21:21,215 INFO L87 Difference]: Start difference. First operand 35332 states and 146379 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:22,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:22,846 INFO L93 Difference]: Finished difference Result 63146 states and 258446 transitions. [2021-06-05 06:21:22,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:21:22,846 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:21:22,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:23,221 INFO L225 Difference]: With dead ends: 63146 [2021-06-05 06:21:23,221 INFO L226 Difference]: Without dead ends: 62930 [2021-06-05 06:21:23,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1043.7ms TimeCoverageRelationStatistics Valid=360, Invalid=1710, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:21:23,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62930 states. [2021-06-05 06:21:23,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62930 to 35439. [2021-06-05 06:21:23,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35439 states, 35438 states have (on average 4.145691066087251) internal successors, (146915), 35438 states have internal predecessors, (146915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:24,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35439 states to 35439 states and 146915 transitions. [2021-06-05 06:21:24,189 INFO L78 Accepts]: Start accepts. Automaton has 35439 states and 146915 transitions. Word has length 39 [2021-06-05 06:21:24,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:24,190 INFO L482 AbstractCegarLoop]: Abstraction has 35439 states and 146915 transitions. [2021-06-05 06:21:24,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:24,190 INFO L276 IsEmpty]: Start isEmpty. Operand 35439 states and 146915 transitions. [2021-06-05 06:21:24,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:24,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:24,250 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:24,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 06:21:24,451 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:24,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:24,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1763377011, now seen corresponding path program 21 times [2021-06-05 06:21:24,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:24,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794824059] [2021-06-05 06:21:24,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:24,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:24,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794824059] [2021-06-05 06:21:24,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794824059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:24,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745567148] [2021-06-05 06:21:24,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:24,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:21:24,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:24,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:21:24,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:24,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:24,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2021-06-05 06:21:24,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:24,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:25,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:25,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:45 [2021-06-05 06:21:25,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:21:25,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:25,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:25,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:25,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:9 [2021-06-05 06:21:25,155 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:25,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:21:25,157 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:21:25,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:25,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:21:25,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 06:21:25,217 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:25,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745567148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:25,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:25,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:21:25,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301877530] [2021-06-05 06:21:25,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:21:25,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:25,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:21:25,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:21:25,219 INFO L87 Difference]: Start difference. First operand 35439 states and 146915 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:25,880 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-06-05 06:21:27,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:27,519 INFO L93 Difference]: Finished difference Result 64599 states and 264126 transitions. [2021-06-05 06:21:27,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:21:27,519 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:21:27,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:27,706 INFO L225 Difference]: With dead ends: 64599 [2021-06-05 06:21:27,706 INFO L226 Difference]: Without dead ends: 64378 [2021-06-05 06:21:27,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 1637.4ms TimeCoverageRelationStatistics Valid=577, Invalid=2615, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 06:21:27,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64378 states. [2021-06-05 06:21:28,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64378 to 35778. [2021-06-05 06:21:28,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35778 states, 35777 states have (on average 4.14014590379294) internal successors, (148122), 35777 states have internal predecessors, (148122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:28,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35778 states to 35778 states and 148122 transitions. [2021-06-05 06:21:28,786 INFO L78 Accepts]: Start accepts. Automaton has 35778 states and 148122 transitions. Word has length 39 [2021-06-05 06:21:28,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:28,787 INFO L482 AbstractCegarLoop]: Abstraction has 35778 states and 148122 transitions. [2021-06-05 06:21:28,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:28,787 INFO L276 IsEmpty]: Start isEmpty. Operand 35778 states and 148122 transitions. [2021-06-05 06:21:28,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:28,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:28,848 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:29,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:29,048 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:29,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:29,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1572423621, now seen corresponding path program 22 times [2021-06-05 06:21:29,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:29,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589546537] [2021-06-05 06:21:29,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:29,359 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:29,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:29,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589546537] [2021-06-05 06:21:29,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589546537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:29,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915902394] [2021-06-05 06:21:29,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:21:29,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:21:29,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:29,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:21:29,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:29,537 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:21:29,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:21:29,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:29,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:29,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:29,545 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 06:21:29,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:21:29,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:29,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:29,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:29,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:21:29,687 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:29,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915902394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:29,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:29,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:21:29,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688050181] [2021-06-05 06:21:29,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:21:29,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:29,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:21:29,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:21:29,688 INFO L87 Difference]: Start difference. First operand 35778 states and 148122 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:30,616 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-06-05 06:21:31,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:31,433 INFO L93 Difference]: Finished difference Result 77057 states and 313105 transitions. [2021-06-05 06:21:31,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:21:31,434 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:21:31,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:31,645 INFO L225 Difference]: With dead ends: 77057 [2021-06-05 06:21:31,645 INFO L226 Difference]: Without dead ends: 76873 [2021-06-05 06:21:31,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1173.5ms TimeCoverageRelationStatistics Valid=372, Invalid=1790, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:21:31,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76873 states. [2021-06-05 06:21:32,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76873 to 35467. [2021-06-05 06:21:32,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35467 states, 35466 states have (on average 4.145068516325495) internal successors, (147009), 35466 states have internal predecessors, (147009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:32,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35467 states to 35467 states and 147009 transitions. [2021-06-05 06:21:32,961 INFO L78 Accepts]: Start accepts. Automaton has 35467 states and 147009 transitions. Word has length 39 [2021-06-05 06:21:32,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:32,961 INFO L482 AbstractCegarLoop]: Abstraction has 35467 states and 147009 transitions. [2021-06-05 06:21:32,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:32,961 INFO L276 IsEmpty]: Start isEmpty. Operand 35467 states and 147009 transitions. [2021-06-05 06:21:33,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:33,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:33,035 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:33,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 06:21:33,241 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:33,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:33,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1303937869, now seen corresponding path program 23 times [2021-06-05 06:21:33,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:33,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215010645] [2021-06-05 06:21:33,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:33,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:33,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215010645] [2021-06-05 06:21:33,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215010645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:33,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828385562] [2021-06-05 06:21:33,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:33,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:21:33,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:33,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 06:21:33,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:33,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:33,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:33,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:33,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:33,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-06-05 06:21:33,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:21:33,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:33,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:21:33,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:47 [2021-06-05 06:21:33,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:33,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:33,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:33,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:21:33,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:33,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 30 [2021-06-05 06:21:33,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:21:33,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:33,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:33,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:37 [2021-06-05 06:21:34,156 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:34,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828385562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:34,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:34,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:21:34,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369802460] [2021-06-05 06:21:34,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:21:34,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:34,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:21:34,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:21:34,158 INFO L87 Difference]: Start difference. First operand 35467 states and 147009 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:35,288 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-06-05 06:21:36,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:36,715 INFO L93 Difference]: Finished difference Result 62904 states and 256527 transitions. [2021-06-05 06:21:36,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:21:36,715 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:21:36,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:36,892 INFO L225 Difference]: With dead ends: 62904 [2021-06-05 06:21:36,892 INFO L226 Difference]: Without dead ends: 62810 [2021-06-05 06:21:36,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1776.7ms TimeCoverageRelationStatistics Valid=485, Invalid=3055, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:21:36,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62810 states. [2021-06-05 06:21:37,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62810 to 36170. [2021-06-05 06:21:37,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36170 states, 36169 states have (on average 4.143631286460781) internal successors, (149871), 36169 states have internal predecessors, (149871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:37,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36170 states to 36170 states and 149871 transitions. [2021-06-05 06:21:37,882 INFO L78 Accepts]: Start accepts. Automaton has 36170 states and 149871 transitions. Word has length 39 [2021-06-05 06:21:37,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:37,883 INFO L482 AbstractCegarLoop]: Abstraction has 36170 states and 149871 transitions. [2021-06-05 06:21:37,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:37,883 INFO L276 IsEmpty]: Start isEmpty. Operand 36170 states and 149871 transitions. [2021-06-05 06:21:38,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:38,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:38,151 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:38,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 06:21:38,367 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:38,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:38,367 INFO L82 PathProgramCache]: Analyzing trace with hash 495020509, now seen corresponding path program 24 times [2021-06-05 06:21:38,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:38,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746083726] [2021-06-05 06:21:38,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:38,625 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:38,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:38,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746083726] [2021-06-05 06:21:38,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746083726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:38,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203645684] [2021-06-05 06:21:38,625 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 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 [2021-06-05 06:21:38,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:21:38,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:38,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 06:21:38,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:38,824 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:21:38,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:21:38,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:38,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:38,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:38,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 06:21:38,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 06:21:38,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:38,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:38,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:38,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-06-05 06:21:38,932 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:38,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203645684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:38,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:38,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:21:38,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474166515] [2021-06-05 06:21:38,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:21:38,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:38,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:21:38,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:21:38,933 INFO L87 Difference]: Start difference. First operand 36170 states and 149871 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:40,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:40,475 INFO L93 Difference]: Finished difference Result 69300 states and 285186 transitions. [2021-06-05 06:21:40,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:21:40,475 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:21:40,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:40,664 INFO L225 Difference]: With dead ends: 69300 [2021-06-05 06:21:40,664 INFO L226 Difference]: Without dead ends: 69245 [2021-06-05 06:21:40,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 805.5ms TimeCoverageRelationStatistics Valid=301, Invalid=1339, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:21:40,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69245 states. [2021-06-05 06:21:41,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69245 to 35741. [2021-06-05 06:21:41,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35741 states, 35740 states have (on average 4.143956351426972) internal successors, (148105), 35740 states have internal predecessors, (148105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:41,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35741 states to 35741 states and 148105 transitions. [2021-06-05 06:21:41,671 INFO L78 Accepts]: Start accepts. Automaton has 35741 states and 148105 transitions. Word has length 39 [2021-06-05 06:21:41,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:41,671 INFO L482 AbstractCegarLoop]: Abstraction has 35741 states and 148105 transitions. [2021-06-05 06:21:41,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:41,671 INFO L276 IsEmpty]: Start isEmpty. Operand 35741 states and 148105 transitions. [2021-06-05 06:21:41,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:41,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:41,737 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:41,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 06:21:41,939 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:41,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:41,942 INFO L82 PathProgramCache]: Analyzing trace with hash 630581605, now seen corresponding path program 25 times [2021-06-05 06:21:41,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:41,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314347420] [2021-06-05 06:21:41,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:42,285 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:42,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:42,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314347420] [2021-06-05 06:21:42,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314347420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:42,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25065486] [2021-06-05 06:21:42,285 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 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 [2021-06-05 06:21:42,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:42,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:21:42,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:42,497 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:21:42,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:21:42,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:42,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:42,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:42,503 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 06:21:42,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:21:42,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:42,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:42,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:42,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:21:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:42,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25065486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:42,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:42,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:21:42,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747020909] [2021-06-05 06:21:42,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:21:42,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:42,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:21:42,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:21:42,608 INFO L87 Difference]: Start difference. First operand 35741 states and 148105 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:43,277 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-06-05 06:21:44,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:44,484 INFO L93 Difference]: Finished difference Result 63431 states and 259711 transitions. [2021-06-05 06:21:44,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:21:44,490 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:21:44,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:44,670 INFO L225 Difference]: With dead ends: 63431 [2021-06-05 06:21:44,671 INFO L226 Difference]: Without dead ends: 63215 [2021-06-05 06:21:44,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1210.9ms TimeCoverageRelationStatistics Valid=355, Invalid=1715, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:21:44,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63215 states. [2021-06-05 06:21:45,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63215 to 35591. [2021-06-05 06:21:45,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35591 states, 35590 states have (on average 4.1449002528800225) internal successors, (147517), 35590 states have internal predecessors, (147517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:45,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35591 states to 35591 states and 147517 transitions. [2021-06-05 06:21:45,645 INFO L78 Accepts]: Start accepts. Automaton has 35591 states and 147517 transitions. Word has length 39 [2021-06-05 06:21:45,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:45,645 INFO L482 AbstractCegarLoop]: Abstraction has 35591 states and 147517 transitions. [2021-06-05 06:21:45,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:45,645 INFO L276 IsEmpty]: Start isEmpty. Operand 35591 states and 147517 transitions. [2021-06-05 06:21:45,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:45,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:45,708 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:45,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:45,913 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:45,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:45,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1833798575, now seen corresponding path program 26 times [2021-06-05 06:21:45,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:45,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827113246] [2021-06-05 06:21:45,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:45,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:46,182 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-06-05 06:21:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:46,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:46,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827113246] [2021-06-05 06:21:46,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827113246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:46,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859503765] [2021-06-05 06:21:46,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:46,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:21:46,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:46,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 06:21:46,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:46,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:21:46,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:46,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:46,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:46,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-06-05 06:21:46,619 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:21:46,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 06:21:46,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:46,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:46,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:46,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:18 [2021-06-05 06:21:46,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:46,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:21:46,687 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:21:46,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:46,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:21:46,694 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 06:21:46,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:46,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859503765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:46,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:46,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 06:21:46,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876419860] [2021-06-05 06:21:46,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:21:46,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:46,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:21:46,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:21:46,728 INFO L87 Difference]: Start difference. First operand 35591 states and 147517 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:48,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:48,463 INFO L93 Difference]: Finished difference Result 81055 states and 333972 transitions. [2021-06-05 06:21:48,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:21:48,464 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:21:48,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:48,724 INFO L225 Difference]: With dead ends: 81055 [2021-06-05 06:21:48,724 INFO L226 Difference]: Without dead ends: 81000 [2021-06-05 06:21:48,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1182.1ms TimeCoverageRelationStatistics Valid=402, Invalid=2148, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:21:48,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81000 states. [2021-06-05 06:21:49,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81000 to 36137. [2021-06-05 06:21:49,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36137 states, 36136 states have (on average 4.146695815806951) internal successors, (149845), 36136 states have internal predecessors, (149845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:49,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36137 states to 36137 states and 149845 transitions. [2021-06-05 06:21:49,786 INFO L78 Accepts]: Start accepts. Automaton has 36137 states and 149845 transitions. Word has length 39 [2021-06-05 06:21:49,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:49,787 INFO L482 AbstractCegarLoop]: Abstraction has 36137 states and 149845 transitions. [2021-06-05 06:21:49,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:49,787 INFO L276 IsEmpty]: Start isEmpty. Operand 36137 states and 149845 transitions. [2021-06-05 06:21:49,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:49,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:49,849 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:50,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 06:21:50,049 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:50,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:50,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1196210545, now seen corresponding path program 27 times [2021-06-05 06:21:50,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:50,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176635994] [2021-06-05 06:21:50,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:50,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:50,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176635994] [2021-06-05 06:21:50,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176635994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:50,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611813162] [2021-06-05 06:21:50,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:50,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:21:50,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:50,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 06:21:50,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:50,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:50,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 06:21:50,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:50,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:50,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:50,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:71 [2021-06-05 06:21:50,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:50,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:21:50,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:21:50,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-06-05 06:21:50,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:50,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:50,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-06-05 06:21:50,728 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:50,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:50,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 06:21:50,734 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:50,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:50,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:21:50,751 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:150, output treesize:51 [2021-06-05 06:21:50,852 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:50,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:21:50,853 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:21:50,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:50,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:50,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 06:21:50,873 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:50,897 INFO L628 ElimStorePlain]: treesize reduction 10, result has 78.3 percent of original size [2021-06-05 06:21:50,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:21:50,904 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:37 [2021-06-05 06:21:51,171 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:51,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611813162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:51,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:51,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:21:51,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039506008] [2021-06-05 06:21:51,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:21:51,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:51,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:21:51,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:21:51,173 INFO L87 Difference]: Start difference. First operand 36137 states and 149845 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:54,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:54,189 INFO L93 Difference]: Finished difference Result 83615 states and 341709 transitions. [2021-06-05 06:21:54,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:21:54,190 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:21:54,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:54,420 INFO L225 Difference]: With dead ends: 83615 [2021-06-05 06:21:54,420 INFO L226 Difference]: Without dead ends: 83521 [2021-06-05 06:21:54,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 2075.0ms TimeCoverageRelationStatistics Valid=589, Invalid=4103, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 06:21:54,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83521 states. [2021-06-05 06:21:55,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83521 to 37060. [2021-06-05 06:21:55,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37060 states, 37059 states have (on average 4.140397744137727) internal successors, (153439), 37059 states have internal predecessors, (153439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:55,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37060 states to 37060 states and 153439 transitions. [2021-06-05 06:21:55,517 INFO L78 Accepts]: Start accepts. Automaton has 37060 states and 153439 transitions. Word has length 39 [2021-06-05 06:21:55,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:55,517 INFO L482 AbstractCegarLoop]: Abstraction has 37060 states and 153439 transitions. [2021-06-05 06:21:55,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:55,517 INFO L276 IsEmpty]: Start isEmpty. Operand 37060 states and 153439 transitions. [2021-06-05 06:21:55,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:55,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:55,581 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:55,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:55,785 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:55,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:55,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1679763727, now seen corresponding path program 28 times [2021-06-05 06:21:55,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:55,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612992365] [2021-06-05 06:21:55,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:56,045 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:56,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:56,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612992365] [2021-06-05 06:21:56,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612992365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:56,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66165716] [2021-06-05 06:21:56,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:21:56,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:21:56,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:56,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:21:56,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:56,416 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-06-05 06:21:56,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:21:56,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:56,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:56,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:56,474 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 06:21:56,542 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:21:56,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:21:56,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:56,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:56,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:56,545 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:21:56,576 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:56,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66165716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:56,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:56,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-06-05 06:21:56,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901520258] [2021-06-05 06:21:56,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:21:56,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:56,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:21:56,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:21:56,578 INFO L87 Difference]: Start difference. First operand 37060 states and 153439 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:57,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:57,973 INFO L93 Difference]: Finished difference Result 83732 states and 344958 transitions. [2021-06-05 06:21:57,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:21:57,973 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:21:57,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:58,435 INFO L225 Difference]: With dead ends: 83732 [2021-06-05 06:21:58,435 INFO L226 Difference]: Without dead ends: 83677 [2021-06-05 06:21:58,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 992.1ms TimeCoverageRelationStatistics Valid=233, Invalid=1573, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:21:58,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83677 states. [2021-06-05 06:21:59,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83677 to 37730. [2021-06-05 06:21:59,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37730 states, 37729 states have (on average 4.145537915131596) internal successors, (156407), 37729 states have internal predecessors, (156407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:59,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37730 states to 37730 states and 156407 transitions. [2021-06-05 06:21:59,619 INFO L78 Accepts]: Start accepts. Automaton has 37730 states and 156407 transitions. Word has length 39 [2021-06-05 06:21:59,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:59,619 INFO L482 AbstractCegarLoop]: Abstraction has 37730 states and 156407 transitions. [2021-06-05 06:21:59,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:59,619 INFO L276 IsEmpty]: Start isEmpty. Operand 37730 states and 156407 transitions. [2021-06-05 06:21:59,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:59,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:59,684 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:59,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 06:21:59,884 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:59,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:59,885 INFO L82 PathProgramCache]: Analyzing trace with hash -702447437, now seen corresponding path program 29 times [2021-06-05 06:21:59,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:59,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402721530] [2021-06-05 06:21:59,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:59,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:00,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:00,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:00,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402721530] [2021-06-05 06:22:00,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402721530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:00,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712635439] [2021-06-05 06:22:00,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:00,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:22:00,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:00,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 06:22:00,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:00,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:00,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 06:22:00,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:00,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:00,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:00,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:95 [2021-06-05 06:22:00,601 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_4], 6=[q1, v_prenex_2]} [2021-06-05 06:22:00,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:00,616 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:00,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 38 [2021-06-05 06:22:00,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:00,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:00,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:00,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:00,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:00,665 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:00,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 06:22:00,669 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 06:22:00,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:00,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:00,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:00,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:00,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:00,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 57 [2021-06-05 06:22:00,718 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 06:22:00,763 INFO L628 ElimStorePlain]: treesize reduction 7, result has 90.8 percent of original size [2021-06-05 06:22:00,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 3 xjuncts. [2021-06-05 06:22:00,768 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 7 variables, input treesize:145, output treesize:64 [2021-06-05 06:22:00,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:00,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:22:00,861 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:22:00,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:00,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:22:00,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 06:22:00,920 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:00,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712635439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:00,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:00,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:22:00,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919761488] [2021-06-05 06:22:00,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:22:00,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:00,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:22:00,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:22:00,922 INFO L87 Difference]: Start difference. First operand 37730 states and 156407 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:04,105 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-06-05 06:22:04,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:04,824 INFO L93 Difference]: Finished difference Result 67775 states and 276822 transitions. [2021-06-05 06:22:04,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:22:04,824 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:22:04,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:05,011 INFO L225 Difference]: With dead ends: 67775 [2021-06-05 06:22:05,011 INFO L226 Difference]: Without dead ends: 67665 [2021-06-05 06:22:05,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1563 ImplicationChecksByTransitivity, 2805.7ms TimeCoverageRelationStatistics Valid=822, Invalid=4580, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 06:22:05,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67665 states. [2021-06-05 06:22:05,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67665 to 38001. [2021-06-05 06:22:05,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38001 states, 38000 states have (on average 4.144736842105263) internal successors, (157500), 38000 states have internal predecessors, (157500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:06,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38001 states to 38001 states and 157500 transitions. [2021-06-05 06:22:06,004 INFO L78 Accepts]: Start accepts. Automaton has 38001 states and 157500 transitions. Word has length 39 [2021-06-05 06:22:06,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:06,004 INFO L482 AbstractCegarLoop]: Abstraction has 38001 states and 157500 transitions. [2021-06-05 06:22:06,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:06,004 INFO L276 IsEmpty]: Start isEmpty. Operand 38001 states and 157500 transitions. [2021-06-05 06:22:06,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:06,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:06,070 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:06,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 06:22:06,270 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:06,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:06,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1178577663, now seen corresponding path program 30 times [2021-06-05 06:22:06,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:06,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919719076] [2021-06-05 06:22:06,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:06,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:06,506 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:06,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:06,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919719076] [2021-06-05 06:22:06,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919719076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:06,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279353682] [2021-06-05 06:22:06,507 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 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 [2021-06-05 06:22:06,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:22:06,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:06,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 06:22:06,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:06,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:22:06,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:06,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:06,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:06,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-06-05 06:22:06,767 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:22:06,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 06:22:06,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:06,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:06,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:06,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:15 [2021-06-05 06:22:06,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:06,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279353682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:06,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:06,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 06:22:06,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317979364] [2021-06-05 06:22:06,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:22:06,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:06,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:22:06,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:22:06,829 INFO L87 Difference]: Start difference. First operand 38001 states and 157500 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:08,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:08,616 INFO L93 Difference]: Finished difference Result 84439 states and 343715 transitions. [2021-06-05 06:22:08,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:22:08,616 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:22:08,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:09,092 INFO L225 Difference]: With dead ends: 84439 [2021-06-05 06:22:09,093 INFO L226 Difference]: Without dead ends: 84329 [2021-06-05 06:22:09,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1132.3ms TimeCoverageRelationStatistics Valid=460, Invalid=1990, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:22:09,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84329 states. [2021-06-05 06:22:10,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84329 to 37850. [2021-06-05 06:22:10,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37850 states, 37849 states have (on average 4.145604903696267) internal successors, (156907), 37849 states have internal predecessors, (156907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:10,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37850 states to 37850 states and 156907 transitions. [2021-06-05 06:22:10,274 INFO L78 Accepts]: Start accepts. Automaton has 37850 states and 156907 transitions. Word has length 39 [2021-06-05 06:22:10,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:10,274 INFO L482 AbstractCegarLoop]: Abstraction has 37850 states and 156907 transitions. [2021-06-05 06:22:10,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:10,275 INFO L276 IsEmpty]: Start isEmpty. Operand 37850 states and 156907 transitions. [2021-06-05 06:22:10,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:10,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:10,340 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:10,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:10,540 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:10,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:10,541 INFO L82 PathProgramCache]: Analyzing trace with hash -202749415, now seen corresponding path program 31 times [2021-06-05 06:22:10,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:10,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188453823] [2021-06-05 06:22:10,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:10,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:10,864 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:10,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:10,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188453823] [2021-06-05 06:22:10,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188453823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:10,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008103166] [2021-06-05 06:22:10,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:10,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:10,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:22:10,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:11,103 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:22:11,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:22:11,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:11,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:11,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:11,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 06:22:11,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:22:11,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:11,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:11,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:11,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:22:11,182 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:11,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008103166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:11,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:11,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:22:11,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870591922] [2021-06-05 06:22:11,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:22:11,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:11,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:22:11,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:22:11,183 INFO L87 Difference]: Start difference. First operand 37850 states and 156907 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:12,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:12,738 INFO L93 Difference]: Finished difference Result 66187 states and 270738 transitions. [2021-06-05 06:22:12,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:22:12,739 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:22:12,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:12,918 INFO L225 Difference]: With dead ends: 66187 [2021-06-05 06:22:12,918 INFO L226 Difference]: Without dead ends: 65939 [2021-06-05 06:22:12,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 964.8ms TimeCoverageRelationStatistics Valid=335, Invalid=1471, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:22:12,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65939 states. [2021-06-05 06:22:13,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65939 to 38036. [2021-06-05 06:22:13,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38036 states, 38035 states have (on average 4.143736032601551) internal successors, (157607), 38035 states have internal predecessors, (157607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:13,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38036 states to 38036 states and 157607 transitions. [2021-06-05 06:22:13,951 INFO L78 Accepts]: Start accepts. Automaton has 38036 states and 157607 transitions. Word has length 39 [2021-06-05 06:22:13,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:13,951 INFO L482 AbstractCegarLoop]: Abstraction has 38036 states and 157607 transitions. [2021-06-05 06:22:13,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:13,951 INFO L276 IsEmpty]: Start isEmpty. Operand 38036 states and 157607 transitions. [2021-06-05 06:22:14,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:14,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:14,017 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:14,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 06:22:14,217 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:14,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:14,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1814336637, now seen corresponding path program 32 times [2021-06-05 06:22:14,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:14,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750653153] [2021-06-05 06:22:14,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:14,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:14,503 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:14,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:14,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750653153] [2021-06-05 06:22:14,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750653153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:14,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900519464] [2021-06-05 06:22:14,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:14,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:22:14,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:14,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:22:14,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:14,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:22:14,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:14,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:14,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:14,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 06:22:14,773 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:22:14,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:22:14,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:14,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:14,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:14,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:22:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:14,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900519464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:14,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:14,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:22:14,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474453307] [2021-06-05 06:22:14,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:22:14,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:14,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:22:14,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:22:14,816 INFO L87 Difference]: Start difference. First operand 38036 states and 157607 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:16,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:16,655 INFO L93 Difference]: Finished difference Result 83812 states and 341149 transitions. [2021-06-05 06:22:16,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:22:16,655 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:22:16,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:17,129 INFO L225 Difference]: With dead ends: 83812 [2021-06-05 06:22:17,129 INFO L226 Difference]: Without dead ends: 83644 [2021-06-05 06:22:17,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 963.6ms TimeCoverageRelationStatistics Valid=390, Invalid=1866, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:22:17,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83644 states. [2021-06-05 06:22:17,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83644 to 38098. [2021-06-05 06:22:17,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38098 states, 38097 states have (on average 4.144657059610993) internal successors, (157899), 38097 states have internal predecessors, (157899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:18,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38098 states to 38098 states and 157899 transitions. [2021-06-05 06:22:18,336 INFO L78 Accepts]: Start accepts. Automaton has 38098 states and 157899 transitions. Word has length 39 [2021-06-05 06:22:18,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:18,336 INFO L482 AbstractCegarLoop]: Abstraction has 38098 states and 157899 transitions. [2021-06-05 06:22:18,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:18,337 INFO L276 IsEmpty]: Start isEmpty. Operand 38098 states and 157899 transitions. [2021-06-05 06:22:18,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:18,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:18,412 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:18,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:18,613 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:18,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:18,613 INFO L82 PathProgramCache]: Analyzing trace with hash 2018257383, now seen corresponding path program 33 times [2021-06-05 06:22:18,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:18,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026455937] [2021-06-05 06:22:18,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:18,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:18,921 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:18,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:18,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026455937] [2021-06-05 06:22:18,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026455937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:18,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737852800] [2021-06-05 06:22:18,921 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 [2021-06-05 06:22:18,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:22:18,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:18,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 06:22:18,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:19,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:19,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:22:19,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-06-05 06:22:19,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:19,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:19,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:19,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:40 [2021-06-05 06:22:19,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:19,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:19,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-06-05 06:22:19,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:19,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:19,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:22:19,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:77 [2021-06-05 06:22:19,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:19,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:22:19,428 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:22:19,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:19,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:19,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2021-06-05 06:22:19,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:19,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:19,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:22:19,464 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:44 [2021-06-05 06:22:19,559 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:19,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737852800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:19,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:19,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 06:22:19,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222097602] [2021-06-05 06:22:19,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 06:22:19,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:19,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 06:22:19,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:22:19,560 INFO L87 Difference]: Start difference. First operand 38098 states and 157899 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:23,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:23,096 INFO L93 Difference]: Finished difference Result 67483 states and 274697 transitions. [2021-06-05 06:22:23,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 06:22:23,097 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:22:23,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:23,283 INFO L225 Difference]: With dead ends: 67483 [2021-06-05 06:22:23,283 INFO L226 Difference]: Without dead ends: 67320 [2021-06-05 06:22:23,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 2511.6ms TimeCoverageRelationStatistics Valid=848, Invalid=4122, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 06:22:23,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67320 states. [2021-06-05 06:22:24,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67320 to 38298. [2021-06-05 06:22:24,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38298 states, 38297 states have (on average 4.141995456563177) internal successors, (158626), 38297 states have internal predecessors, (158626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:24,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38298 states to 38298 states and 158626 transitions. [2021-06-05 06:22:24,340 INFO L78 Accepts]: Start accepts. Automaton has 38298 states and 158626 transitions. Word has length 39 [2021-06-05 06:22:24,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:24,340 INFO L482 AbstractCegarLoop]: Abstraction has 38298 states and 158626 transitions. [2021-06-05 06:22:24,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:24,340 INFO L276 IsEmpty]: Start isEmpty. Operand 38298 states and 158626 transitions. [2021-06-05 06:22:24,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:24,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:24,407 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:24,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 06:22:24,607 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:24,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:24,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1639438975, now seen corresponding path program 34 times [2021-06-05 06:22:24,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:24,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315186615] [2021-06-05 06:22:24,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:24,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:24,912 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:24,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:24,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315186615] [2021-06-05 06:22:24,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315186615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:24,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303403812] [2021-06-05 06:22:24,913 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) [2021-06-05 06:22:24,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:22:24,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:24,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:22:24,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:25,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:22:25,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:25,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:25,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:25,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 06:22:25,176 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:22:25,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:22:25,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:25,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:25,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:25,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:22:25,216 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:25,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303403812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:25,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:25,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:22:25,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466147045] [2021-06-05 06:22:25,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:22:25,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:25,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:22:25,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:22:25,218 INFO L87 Difference]: Start difference. First operand 38298 states and 158626 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:26,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:26,915 INFO L93 Difference]: Finished difference Result 84389 states and 343968 transitions. [2021-06-05 06:22:26,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:22:26,916 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:22:26,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:27,162 INFO L225 Difference]: With dead ends: 84389 [2021-06-05 06:22:27,163 INFO L226 Difference]: Without dead ends: 84307 [2021-06-05 06:22:27,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1022.0ms TimeCoverageRelationStatistics Valid=377, Invalid=1879, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:22:27,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84307 states. [2021-06-05 06:22:28,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84307 to 38064. [2021-06-05 06:22:28,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38064 states, 38063 states have (on average 4.147886398865039) internal successors, (157881), 38063 states have internal predecessors, (157881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:28,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38064 states to 38064 states and 157881 transitions. [2021-06-05 06:22:28,421 INFO L78 Accepts]: Start accepts. Automaton has 38064 states and 157881 transitions. Word has length 39 [2021-06-05 06:22:28,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:28,422 INFO L482 AbstractCegarLoop]: Abstraction has 38064 states and 157881 transitions. [2021-06-05 06:22:28,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:28,422 INFO L276 IsEmpty]: Start isEmpty. Operand 38064 states and 157881 transitions. [2021-06-05 06:22:28,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:28,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:28,489 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:28,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-06-05 06:22:28,689 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:28,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:28,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1355985241, now seen corresponding path program 35 times [2021-06-05 06:22:28,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:28,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170726064] [2021-06-05 06:22:28,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:28,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:28,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:28,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170726064] [2021-06-05 06:22:28,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170726064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:28,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046512886] [2021-06-05 06:22:28,989 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:29,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:22:29,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:29,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 06:22:29,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:29,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:29,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:29,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:29,452 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:29,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 53 [2021-06-05 06:22:29,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:22:29,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:29,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:29,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:50 [2021-06-05 06:22:29,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:22:29,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:29,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:29,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:22:29,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 06:22:29,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:29,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:29,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:29,647 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:29,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-06-05 06:22:29,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:22:29,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:29,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:22:29,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 06:22:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:29,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046512886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:29,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:29,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:22:29,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745675693] [2021-06-05 06:22:29,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:22:29,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:29,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:22:29,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:22:29,706 INFO L87 Difference]: Start difference. First operand 38064 states and 157881 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:32,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:32,825 INFO L93 Difference]: Finished difference Result 68705 states and 280705 transitions. [2021-06-05 06:22:32,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 06:22:32,826 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:22:32,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:33,018 INFO L225 Difference]: With dead ends: 68705 [2021-06-05 06:22:33,018 INFO L226 Difference]: Without dead ends: 68484 [2021-06-05 06:22:33,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 2178.2ms TimeCoverageRelationStatistics Valid=710, Invalid=3982, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 06:22:33,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68484 states. [2021-06-05 06:22:33,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68484 to 38413. [2021-06-05 06:22:33,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38413 states, 38412 states have (on average 4.143366656253254) internal successors, (159155), 38412 states have internal predecessors, (159155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:34,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38413 states to 38413 states and 159155 transitions. [2021-06-05 06:22:34,034 INFO L78 Accepts]: Start accepts. Automaton has 38413 states and 159155 transitions. Word has length 39 [2021-06-05 06:22:34,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:34,034 INFO L482 AbstractCegarLoop]: Abstraction has 38413 states and 159155 transitions. [2021-06-05 06:22:34,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:34,035 INFO L276 IsEmpty]: Start isEmpty. Operand 38413 states and 159155 transitions. [2021-06-05 06:22:34,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:34,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:34,103 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:34,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:34,303 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:34,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:34,304 INFO L82 PathProgramCache]: Analyzing trace with hash -768675797, now seen corresponding path program 36 times [2021-06-05 06:22:34,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:34,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039125614] [2021-06-05 06:22:34,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:34,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:34,593 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:34,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:34,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039125614] [2021-06-05 06:22:34,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039125614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:34,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649788652] [2021-06-05 06:22:34,593 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:34,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:22:34,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:34,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 06:22:34,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:34,804 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:22:34,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:22:34,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:34,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:34,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:34,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 06:22:34,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:22:34,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:34,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:34,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:34,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:22:34,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:34,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649788652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:34,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:34,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:22:34,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200820717] [2021-06-05 06:22:34,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:22:34,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:34,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:22:34,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:22:34,916 INFO L87 Difference]: Start difference. First operand 38413 states and 159155 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:36,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:36,556 INFO L93 Difference]: Finished difference Result 79647 states and 323863 transitions. [2021-06-05 06:22:36,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:22:36,556 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:22:36,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:36,779 INFO L225 Difference]: With dead ends: 79647 [2021-06-05 06:22:36,779 INFO L226 Difference]: Without dead ends: 79463 [2021-06-05 06:22:36,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1172.8ms TimeCoverageRelationStatistics Valid=385, Invalid=1777, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:22:37,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79463 states. [2021-06-05 06:22:37,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79463 to 38199. [2021-06-05 06:22:37,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38199 states, 38198 states have (on average 4.146683072412168) internal successors, (158395), 38198 states have internal predecessors, (158395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:38,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38199 states to 38199 states and 158395 transitions. [2021-06-05 06:22:38,161 INFO L78 Accepts]: Start accepts. Automaton has 38199 states and 158395 transitions. Word has length 39 [2021-06-05 06:22:38,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:38,162 INFO L482 AbstractCegarLoop]: Abstraction has 38199 states and 158395 transitions. [2021-06-05 06:22:38,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:38,162 INFO L276 IsEmpty]: Start isEmpty. Operand 38199 states and 158395 transitions. [2021-06-05 06:22:38,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:38,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:38,235 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:38,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:38,435 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:38,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:38,436 INFO L82 PathProgramCache]: Analyzing trace with hash -789200017, now seen corresponding path program 37 times [2021-06-05 06:22:38,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:38,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35851240] [2021-06-05 06:22:38,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:38,768 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:38,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:38,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35851240] [2021-06-05 06:22:38,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35851240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:38,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287560962] [2021-06-05 06:22:38,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:38,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:22:38,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:39,002 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:22:39,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:22:39,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:39,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:39,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:39,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-06-05 06:22:39,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:22:39,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:39,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:39,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:39,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:22:39,080 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:39,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287560962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:39,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:39,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:22:39,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118106758] [2021-06-05 06:22:39,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:22:39,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:39,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:22:39,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:22:39,081 INFO L87 Difference]: Start difference. First operand 38199 states and 158395 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:40,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:40,593 INFO L93 Difference]: Finished difference Result 66459 states and 271895 transitions. [2021-06-05 06:22:40,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:22:40,593 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:22:40,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:40,779 INFO L225 Difference]: With dead ends: 66459 [2021-06-05 06:22:40,780 INFO L226 Difference]: Without dead ends: 66211 [2021-06-05 06:22:40,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 965.9ms TimeCoverageRelationStatistics Valid=352, Invalid=1454, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:22:40,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66211 states. [2021-06-05 06:22:41,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66211 to 38385. [2021-06-05 06:22:41,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38385 states, 38384 states have (on average 4.144825969153814) internal successors, (159095), 38384 states have internal predecessors, (159095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:41,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38385 states to 38385 states and 159095 transitions. [2021-06-05 06:22:41,809 INFO L78 Accepts]: Start accepts. Automaton has 38385 states and 159095 transitions. Word has length 39 [2021-06-05 06:22:41,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:41,809 INFO L482 AbstractCegarLoop]: Abstraction has 38385 states and 159095 transitions. [2021-06-05 06:22:41,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:41,809 INFO L276 IsEmpty]: Start isEmpty. Operand 38385 states and 159095 transitions. [2021-06-05 06:22:41,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:41,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:41,875 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:42,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:42,076 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:42,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:42,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1112900731, now seen corresponding path program 38 times [2021-06-05 06:22:42,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:42,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117651752] [2021-06-05 06:22:42,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:42,379 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:42,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:42,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117651752] [2021-06-05 06:22:42,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117651752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:42,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347332049] [2021-06-05 06:22:42,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:42,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:22:42,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:42,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:22:42,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:42,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:22:42,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:42,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:42,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:42,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 06:22:42,633 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:22:42,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:22:42,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:42,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:42,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:42,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:22:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:42,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347332049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:42,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:42,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:22:42,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385861903] [2021-06-05 06:22:42,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:22:42,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:42,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:22:42,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:22:42,676 INFO L87 Difference]: Start difference. First operand 38385 states and 159095 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:44,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:44,340 INFO L93 Difference]: Finished difference Result 83904 states and 341551 transitions. [2021-06-05 06:22:44,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:22:44,340 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:22:44,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:44,576 INFO L225 Difference]: With dead ends: 83904 [2021-06-05 06:22:44,576 INFO L226 Difference]: Without dead ends: 83752 [2021-06-05 06:22:44,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 982.7ms TimeCoverageRelationStatistics Valid=395, Invalid=1767, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:22:44,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83752 states. [2021-06-05 06:22:45,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83752 to 38447. [2021-06-05 06:22:45,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38447 states, 38446 states have (on average 4.145736877698591) internal successors, (159387), 38446 states have internal predecessors, (159387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:45,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38447 states to 38447 states and 159387 transitions. [2021-06-05 06:22:45,824 INFO L78 Accepts]: Start accepts. Automaton has 38447 states and 159387 transitions. Word has length 39 [2021-06-05 06:22:45,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:45,824 INFO L482 AbstractCegarLoop]: Abstraction has 38447 states and 159387 transitions. [2021-06-05 06:22:45,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:45,824 INFO L276 IsEmpty]: Start isEmpty. Operand 38447 states and 159387 transitions. [2021-06-05 06:22:45,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:45,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:45,890 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:46,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:46,091 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:46,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:46,091 INFO L82 PathProgramCache]: Analyzing trace with hash -908979985, now seen corresponding path program 39 times [2021-06-05 06:22:46,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:46,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091481694] [2021-06-05 06:22:46,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:46,395 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:46,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:46,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091481694] [2021-06-05 06:22:46,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091481694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:46,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096485356] [2021-06-05 06:22:46,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:46,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:22:46,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:46,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 06:22:46,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:46,906 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:46,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 49 [2021-06-05 06:22:46,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:46,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:46,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:46,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:74 [2021-06-05 06:22:46,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:46,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 06:22:46,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:46,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:46,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 38 [2021-06-05 06:22:46,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:46,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:46,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-06-05 06:22:46,989 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:46,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:46,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-06-05 06:22:46,992 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:47,034 INFO L628 ElimStorePlain]: treesize reduction 30, result has 68.4 percent of original size [2021-06-05 06:22:47,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:22:47,035 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:233, output treesize:65 [2021-06-05 06:22:47,099 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:47,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:22:47,100 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:22:47,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:47,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:47,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:22:47,137 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:22:47,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:47,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:22:47,171 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:88, output treesize:95 [2021-06-05 06:22:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:47,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096485356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:47,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:47,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 06:22:47,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806368729] [2021-06-05 06:22:47,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 06:22:47,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:47,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 06:22:47,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:22:47,342 INFO L87 Difference]: Start difference. First operand 38447 states and 159387 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:49,084 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-06-05 06:22:50,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:50,167 INFO L93 Difference]: Finished difference Result 66874 states and 271747 transitions. [2021-06-05 06:22:50,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:22:50,167 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:22:50,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:50,344 INFO L225 Difference]: With dead ends: 66874 [2021-06-05 06:22:50,344 INFO L226 Difference]: Without dead ends: 66702 [2021-06-05 06:22:50,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 2358.3ms TimeCoverageRelationStatistics Valid=889, Invalid=3271, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 06:22:50,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66702 states. [2021-06-05 06:22:51,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66702 to 38469. [2021-06-05 06:22:51,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38469 states, 38468 states have (on average 4.145549547675991) internal successors, (159471), 38468 states have internal predecessors, (159471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:51,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38469 states to 38469 states and 159471 transitions. [2021-06-05 06:22:51,373 INFO L78 Accepts]: Start accepts. Automaton has 38469 states and 159471 transitions. Word has length 39 [2021-06-05 06:22:51,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:51,373 INFO L482 AbstractCegarLoop]: Abstraction has 38469 states and 159471 transitions. [2021-06-05 06:22:51,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:51,373 INFO L276 IsEmpty]: Start isEmpty. Operand 38469 states and 159471 transitions. [2021-06-05 06:22:51,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:51,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:51,441 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:51,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:51,641 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:51,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:51,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1386806843, now seen corresponding path program 40 times [2021-06-05 06:22:51,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:51,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731563423] [2021-06-05 06:22:51,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:51,949 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:51,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:51,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731563423] [2021-06-05 06:22:51,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731563423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:51,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652694634] [2021-06-05 06:22:51,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:51,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:22:51,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:51,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:22:51,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:52,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:22:52,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:52,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:52,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:52,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 06:22:52,220 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:22:52,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:22:52,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:52,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:52,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:52,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:22:52,273 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:52,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652694634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:52,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:52,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:22:52,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731289944] [2021-06-05 06:22:52,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:22:52,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:52,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:22:52,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:22:52,274 INFO L87 Difference]: Start difference. First operand 38469 states and 159471 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:54,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:54,076 INFO L93 Difference]: Finished difference Result 84495 states and 344543 transitions. [2021-06-05 06:22:54,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:22:54,076 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:22:54,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:54,538 INFO L225 Difference]: With dead ends: 84495 [2021-06-05 06:22:54,538 INFO L226 Difference]: Without dead ends: 84413 [2021-06-05 06:22:54,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1042.4ms TimeCoverageRelationStatistics Valid=399, Invalid=1857, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:22:54,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84413 states. [2021-06-05 06:22:55,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84413 to 38199. [2021-06-05 06:22:55,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38199 states, 38198 states have (on average 4.146683072412168) internal successors, (158395), 38198 states have internal predecessors, (158395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:55,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38199 states to 38199 states and 158395 transitions. [2021-06-05 06:22:55,743 INFO L78 Accepts]: Start accepts. Automaton has 38199 states and 158395 transitions. Word has length 39 [2021-06-05 06:22:55,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:55,743 INFO L482 AbstractCegarLoop]: Abstraction has 38199 states and 158395 transitions. [2021-06-05 06:22:55,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:55,744 INFO L276 IsEmpty]: Start isEmpty. Operand 38199 states and 158395 transitions. [2021-06-05 06:22:55,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:55,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:55,816 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:56,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:56,017 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:56,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:56,017 INFO L82 PathProgramCache]: Analyzing trace with hash -651444937, now seen corresponding path program 41 times [2021-06-05 06:22:56,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:56,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246680278] [2021-06-05 06:22:56,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:56,269 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:56,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:56,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246680278] [2021-06-05 06:22:56,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246680278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:56,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224546996] [2021-06-05 06:22:56,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:56,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:22:56,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:56,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 06:22:56,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:56,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:56,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:56,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:56,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:56,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-06-05 06:22:56,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:22:56,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:56,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:22:56,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:63, output treesize:45 [2021-06-05 06:22:56,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:56,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:56,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:56,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:22:56,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:56,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2021-06-05 06:22:56,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:22:56,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:56,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:22:56,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:45 [2021-06-05 06:22:56,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:22:56,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 06:22:56,838 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:22:56,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:56,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:22:56,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:18 [2021-06-05 06:22:56,887 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:56,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224546996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:56,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:56,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:22:56,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282445081] [2021-06-05 06:22:56,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:22:56,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:56,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:22:56,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:22:56,888 INFO L87 Difference]: Start difference. First operand 38199 states and 158395 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:58,024 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-06-05 06:22:59,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:59,972 INFO L93 Difference]: Finished difference Result 65998 states and 269004 transitions. [2021-06-05 06:22:59,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:22:59,973 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:22:59,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:00,148 INFO L225 Difference]: With dead ends: 65998 [2021-06-05 06:23:00,149 INFO L226 Difference]: Without dead ends: 65904 [2021-06-05 06:23:00,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 2040.8ms TimeCoverageRelationStatistics Valid=539, Invalid=3493, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 06:23:00,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65904 states. [2021-06-05 06:23:01,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65904 to 38945. [2021-06-05 06:23:01,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38945 states, 38944 states have (on average 4.145259860312243) internal successors, (161433), 38944 states have internal predecessors, (161433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:01,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38945 states to 38945 states and 161433 transitions. [2021-06-05 06:23:01,159 INFO L78 Accepts]: Start accepts. Automaton has 38945 states and 161433 transitions. Word has length 39 [2021-06-05 06:23:01,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:01,159 INFO L482 AbstractCegarLoop]: Abstraction has 38945 states and 161433 transitions. [2021-06-05 06:23:01,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:01,159 INFO L276 IsEmpty]: Start isEmpty. Operand 38945 states and 161433 transitions. [2021-06-05 06:23:01,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:23:01,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:01,450 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:01,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 06:23:01,661 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:01,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:01,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1147513441, now seen corresponding path program 42 times [2021-06-05 06:23:01,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:01,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890509968] [2021-06-05 06:23:01,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:01,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:01,888 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:01,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:01,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890509968] [2021-06-05 06:23:01,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890509968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:01,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123760957] [2021-06-05 06:23:01,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:01,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:23:01,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:01,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 06:23:01,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:02,084 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:23:02,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:23:02,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:02,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:02,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:02,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 06:23:02,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 06:23:02,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:02,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:02,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:02,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:15 [2021-06-05 06:23:02,175 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:02,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123760957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:02,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:02,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:23:02,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561059590] [2021-06-05 06:23:02,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:23:02,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:02,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:23:02,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:23:02,176 INFO L87 Difference]: Start difference. First operand 38945 states and 161433 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:03,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:03,872 INFO L93 Difference]: Finished difference Result 75097 states and 308762 transitions. [2021-06-05 06:23:03,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:23:03,873 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:23:03,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:04,079 INFO L225 Difference]: With dead ends: 75097 [2021-06-05 06:23:04,079 INFO L226 Difference]: Without dead ends: 75042 [2021-06-05 06:23:04,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 871.1ms TimeCoverageRelationStatistics Valid=338, Invalid=1468, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:23:04,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75042 states. [2021-06-05 06:23:05,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75042 to 39019. [2021-06-05 06:23:05,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39019 states, 39018 states have (on average 4.1427802552668) internal successors, (161643), 39018 states have internal predecessors, (161643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:05,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39019 states to 39019 states and 161643 transitions. [2021-06-05 06:23:05,230 INFO L78 Accepts]: Start accepts. Automaton has 39019 states and 161643 transitions. Word has length 39 [2021-06-05 06:23:05,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:05,231 INFO L482 AbstractCegarLoop]: Abstraction has 39019 states and 161643 transitions. [2021-06-05 06:23:05,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:05,231 INFO L276 IsEmpty]: Start isEmpty. Operand 39019 states and 161643 transitions. [2021-06-05 06:23:05,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:23:05,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:05,299 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:05,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 06:23:05,499 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:05,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:05,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1283074537, now seen corresponding path program 43 times [2021-06-05 06:23:05,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:05,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057821158] [2021-06-05 06:23:05,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:05,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:05,766 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:05,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:05,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057821158] [2021-06-05 06:23:05,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057821158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:05,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848869756] [2021-06-05 06:23:05,766 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:05,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:05,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:23:05,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:05,949 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:23:05,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:23:05,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:05,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:05,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:05,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-06-05 06:23:06,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:23:06,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:06,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:06,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:06,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:23:06,057 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:06,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848869756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:06,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:06,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:23:06,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878088999] [2021-06-05 06:23:06,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:23:06,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:06,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:23:06,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:23:06,058 INFO L87 Difference]: Start difference. First operand 39019 states and 161643 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:08,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:08,036 INFO L93 Difference]: Finished difference Result 70745 states and 289441 transitions. [2021-06-05 06:23:08,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:23:08,036 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:23:08,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:08,239 INFO L225 Difference]: With dead ends: 70745 [2021-06-05 06:23:08,239 INFO L226 Difference]: Without dead ends: 70529 [2021-06-05 06:23:08,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 956.9ms TimeCoverageRelationStatistics Valid=335, Invalid=1735, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:23:08,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70529 states. [2021-06-05 06:23:09,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70529 to 38869. [2021-06-05 06:23:09,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38869 states, 38868 states have (on average 4.143640012349491) internal successors, (161055), 38868 states have internal predecessors, (161055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:09,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38869 states to 38869 states and 161055 transitions. [2021-06-05 06:23:09,332 INFO L78 Accepts]: Start accepts. Automaton has 38869 states and 161055 transitions. Word has length 39 [2021-06-05 06:23:09,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:09,332 INFO L482 AbstractCegarLoop]: Abstraction has 38869 states and 161055 transitions. [2021-06-05 06:23:09,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:09,333 INFO L276 IsEmpty]: Start isEmpty. Operand 38869 states and 161055 transitions. [2021-06-05 06:23:09,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:23:09,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:09,402 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:09,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-06-05 06:23:09,603 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:09,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:09,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1808675789, now seen corresponding path program 44 times [2021-06-05 06:23:09,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:09,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253699897] [2021-06-05 06:23:09,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:09,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:09,843 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:09,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:09,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253699897] [2021-06-05 06:23:09,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253699897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:09,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461181081] [2021-06-05 06:23:09,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:09,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:23:09,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:09,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 06:23:09,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:10,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:23:10,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:10,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:10,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:10,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-06-05 06:23:10,069 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:23:10,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 06:23:10,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:10,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:10,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:10,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:18 [2021-06-05 06:23:10,127 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:10,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:23:10,128 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:10,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:10,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:10,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 06:23:10,172 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:10,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461181081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:10,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:10,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 06:23:10,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430608160] [2021-06-05 06:23:10,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:23:10,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:10,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:23:10,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:23:10,174 INFO L87 Difference]: Start difference. First operand 38869 states and 161055 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:10,463 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-06-05 06:23:12,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:12,550 INFO L93 Difference]: Finished difference Result 91056 states and 375094 transitions. [2021-06-05 06:23:12,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:23:12,550 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:23:12,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:12,836 INFO L225 Difference]: With dead ends: 91056 [2021-06-05 06:23:12,836 INFO L226 Difference]: Without dead ends: 91001 [2021-06-05 06:23:12,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1253.9ms TimeCoverageRelationStatistics Valid=407, Invalid=2349, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:23:12,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91001 states. [2021-06-05 06:23:13,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91001 to 39391. [2021-06-05 06:23:14,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39391 states, 39390 states have (on average 4.1452399086062455) internal successors, (163281), 39390 states have internal predecessors, (163281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:14,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39391 states to 39391 states and 163281 transitions. [2021-06-05 06:23:14,134 INFO L78 Accepts]: Start accepts. Automaton has 39391 states and 163281 transitions. Word has length 39 [2021-06-05 06:23:14,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:14,134 INFO L482 AbstractCegarLoop]: Abstraction has 39391 states and 163281 transitions. [2021-06-05 06:23:14,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:14,135 INFO L276 IsEmpty]: Start isEmpty. Operand 39391 states and 163281 transitions. [2021-06-05 06:23:14,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:23:14,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:14,204 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:14,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:14,417 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:14,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:14,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1848703477, now seen corresponding path program 45 times [2021-06-05 06:23:14,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:14,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157700062] [2021-06-05 06:23:14,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:14,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:14,643 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:14,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:14,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157700062] [2021-06-05 06:23:14,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157700062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:14,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38536820] [2021-06-05 06:23:14,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:23:14,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:23:14,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:14,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 06:23:14,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:14,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:14,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 06:23:14,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:14,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:14,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:14,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:69 [2021-06-05 06:23:15,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:15,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 39 [2021-06-05 06:23:15,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:15,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:15,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-06-05 06:23:15,149 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 06:23:15,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:15,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:15,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-06-05 06:23:15,162 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:15,237 INFO L628 ElimStorePlain]: treesize reduction 16, result has 89.5 percent of original size [2021-06-05 06:23:15,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:23:15,247 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:185, output treesize:185 [2021-06-05 06:23:15,357 INFO L446 ElimStorePlain]: Different costs {0=[q2], 1=[v_prenex_8]} [2021-06-05 06:23:15,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 5 [2021-06-05 06:23:15,360 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:23:15,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:15,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:15,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 06:23:15,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:15,403 INFO L628 ElimStorePlain]: treesize reduction 13, result has 72.3 percent of original size [2021-06-05 06:23:15,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:15,404 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:66, output treesize:32 [2021-06-05 06:23:15,456 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:15,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38536820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:15,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:15,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-06-05 06:23:15,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142436852] [2021-06-05 06:23:15,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:23:15,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:15,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:23:15,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:23:15,457 INFO L87 Difference]: Start difference. First operand 39391 states and 163281 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:18,612 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-06-05 06:23:19,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:19,045 INFO L93 Difference]: Finished difference Result 80465 states and 329554 transitions. [2021-06-05 06:23:19,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:23:19,045 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:23:19,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:19,274 INFO L225 Difference]: With dead ends: 80465 [2021-06-05 06:23:19,274 INFO L226 Difference]: Without dead ends: 80383 [2021-06-05 06:23:19,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 2362.0ms TimeCoverageRelationStatistics Valid=525, Invalid=4445, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 06:23:19,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80383 states. [2021-06-05 06:23:20,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80383 to 39603. [2021-06-05 06:23:20,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39603 states, 39602 states have (on average 4.142997828392505) internal successors, (164071), 39602 states have internal predecessors, (164071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:20,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39603 states to 39603 states and 164071 transitions. [2021-06-05 06:23:20,403 INFO L78 Accepts]: Start accepts. Automaton has 39603 states and 164071 transitions. Word has length 39 [2021-06-05 06:23:20,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:20,403 INFO L482 AbstractCegarLoop]: Abstraction has 39603 states and 164071 transitions. [2021-06-05 06:23:20,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:20,404 INFO L276 IsEmpty]: Start isEmpty. Operand 39603 states and 164071 transitions. [2021-06-05 06:23:20,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:23:20,477 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:20,477 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:20,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 06:23:20,678 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:20,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:20,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1027270795, now seen corresponding path program 46 times [2021-06-05 06:23:20,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:20,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530701230] [2021-06-05 06:23:20,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:20,901 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:20,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:20,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530701230] [2021-06-05 06:23:20,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530701230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:20,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546574177] [2021-06-05 06:23:20,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:20,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:23:20,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:20,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:23:20,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:21,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:23:21,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:21,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:21,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:21,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 06:23:21,161 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:23:21,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:23:21,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:21,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:21,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:21,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:23:21,191 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:21,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546574177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:21,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:21,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-06-05 06:23:21,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446400374] [2021-06-05 06:23:21,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:23:21,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:21,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:23:21,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:23:21,192 INFO L87 Difference]: Start difference. First operand 39603 states and 164071 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:23,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:23,235 INFO L93 Difference]: Finished difference Result 87268 states and 359857 transitions. [2021-06-05 06:23:23,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:23:23,235 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:23:23,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:23,476 INFO L225 Difference]: With dead ends: 87268 [2021-06-05 06:23:23,476 INFO L226 Difference]: Without dead ends: 87213 [2021-06-05 06:23:23,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 737.9ms TimeCoverageRelationStatistics Valid=231, Invalid=1575, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:23:23,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87213 states. [2021-06-05 06:23:24,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87213 to 39607. [2021-06-05 06:23:24,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39607 states, 39606 states have (on average 4.146821188708781) internal successors, (164239), 39606 states have internal predecessors, (164239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:24,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39607 states to 39607 states and 164239 transitions. [2021-06-05 06:23:24,747 INFO L78 Accepts]: Start accepts. Automaton has 39607 states and 164239 transitions. Word has length 39 [2021-06-05 06:23:24,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:24,747 INFO L482 AbstractCegarLoop]: Abstraction has 39607 states and 164239 transitions. [2021-06-05 06:23:24,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:24,747 INFO L276 IsEmpty]: Start isEmpty. Operand 39607 states and 164239 transitions. [2021-06-05 06:23:25,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:23:25,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:25,069 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:25,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 06:23:25,285 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:25,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:25,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1837073937, now seen corresponding path program 47 times [2021-06-05 06:23:25,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:25,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034416087] [2021-06-05 06:23:25,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:25,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:25,530 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:25,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:25,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034416087] [2021-06-05 06:23:25,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034416087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:25,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100839045] [2021-06-05 06:23:25,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:25,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:23:25,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:25,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:23:25,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:25,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:23:25,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:25,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:25,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:25,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:32 [2021-06-05 06:23:25,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:25,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:25,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:25,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:25,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 57 [2021-06-05 06:23:25,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:23:25,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:25,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:25,819 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:25 [2021-06-05 06:23:25,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:25,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:23:25,856 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:25,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:25,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:25,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:33 [2021-06-05 06:23:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:25,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100839045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:25,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:25,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:23:25,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580199797] [2021-06-05 06:23:25,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:23:25,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:25,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:23:25,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:23:25,950 INFO L87 Difference]: Start difference. First operand 39607 states and 164239 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:27,786 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-06-05 06:23:29,738 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2021-06-05 06:23:29,875 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-06-05 06:23:33,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:33,120 INFO L93 Difference]: Finished difference Result 139922 states and 566971 transitions. [2021-06-05 06:23:33,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 06:23:33,120 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:23:33,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:33,555 INFO L225 Difference]: With dead ends: 139922 [2021-06-05 06:23:33,555 INFO L226 Difference]: Without dead ends: 139812 [2021-06-05 06:23:33,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4049 ImplicationChecksByTransitivity, 5065.1ms TimeCoverageRelationStatistics Valid=2037, Invalid=9305, Unknown=0, NotChecked=0, Total=11342 [2021-06-05 06:23:33,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139812 states. [2021-06-05 06:23:35,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139812 to 39796. [2021-06-05 06:23:35,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39796 states, 39795 states have (on average 4.149943460233698) internal successors, (165147), 39795 states have internal predecessors, (165147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:35,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39796 states to 39796 states and 165147 transitions. [2021-06-05 06:23:35,226 INFO L78 Accepts]: Start accepts. Automaton has 39796 states and 165147 transitions. Word has length 39 [2021-06-05 06:23:35,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:35,226 INFO L482 AbstractCegarLoop]: Abstraction has 39796 states and 165147 transitions. [2021-06-05 06:23:35,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:35,226 INFO L276 IsEmpty]: Start isEmpty. Operand 39796 states and 165147 transitions. [2021-06-05 06:23:35,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:23:35,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:35,295 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:35,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 06:23:35,496 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:35,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:35,496 INFO L82 PathProgramCache]: Analyzing trace with hash -49954505, now seen corresponding path program 48 times [2021-06-05 06:23:35,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:35,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888899480] [2021-06-05 06:23:35,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:35,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:35,743 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:35,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:35,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888899480] [2021-06-05 06:23:35,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888899480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:35,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616992483] [2021-06-05 06:23:35,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:35,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:23:35,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:35,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 06:23:35,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:35,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:23:35,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:35,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:35,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:23:35,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:28 [2021-06-05 06:23:36,036 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:36,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 06:23:36,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:36,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:36,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:36,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:23 [2021-06-05 06:23:36,109 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:36,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616992483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:36,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:36,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 06:23:36,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553770539] [2021-06-05 06:23:36,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:23:36,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:36,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:23:36,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:23:36,110 INFO L87 Difference]: Start difference. First operand 39796 states and 165147 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:38,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:38,962 INFO L93 Difference]: Finished difference Result 79079 states and 323924 transitions. [2021-06-05 06:23:38,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:23:38,962 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:23:38,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:39,191 INFO L225 Difference]: With dead ends: 79079 [2021-06-05 06:23:39,191 INFO L226 Difference]: Without dead ends: 79024 [2021-06-05 06:23:39,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 1566.1ms TimeCoverageRelationStatistics Valid=620, Invalid=3412, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 06:23:39,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79024 states. [2021-06-05 06:23:40,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79024 to 40405. [2021-06-05 06:23:40,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40405 states, 40404 states have (on average 4.151692901692901) internal successors, (167745), 40404 states have internal predecessors, (167745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:40,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40405 states to 40405 states and 167745 transitions. [2021-06-05 06:23:40,338 INFO L78 Accepts]: Start accepts. Automaton has 40405 states and 167745 transitions. Word has length 39 [2021-06-05 06:23:40,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:40,338 INFO L482 AbstractCegarLoop]: Abstraction has 40405 states and 167745 transitions. [2021-06-05 06:23:40,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:40,338 INFO L276 IsEmpty]: Start isEmpty. Operand 40405 states and 167745 transitions. [2021-06-05 06:23:40,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:23:40,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:40,407 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:40,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:40,609 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:40,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:40,609 INFO L82 PathProgramCache]: Analyzing trace with hash 589013065, now seen corresponding path program 49 times [2021-06-05 06:23:40,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:40,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728709612] [2021-06-05 06:23:40,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:40,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:40,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:40,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728709612] [2021-06-05 06:23:40,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728709612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:40,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468561035] [2021-06-05 06:23:40,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:40,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:23:40,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:41,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:23:41,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:41,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:41,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:41,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 06:23:41,106 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:23:41,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:23:41,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:41,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:41,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:41,108 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:23:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:41,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468561035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:41,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:41,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:23:41,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995442822] [2021-06-05 06:23:41,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:23:41,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:41,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:23:41,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:23:41,150 INFO L87 Difference]: Start difference. First operand 40405 states and 167745 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:43,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:43,188 INFO L93 Difference]: Finished difference Result 95721 states and 391683 transitions. [2021-06-05 06:23:43,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:23:43,188 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:23:43,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:43,451 INFO L225 Difference]: With dead ends: 95721 [2021-06-05 06:23:43,451 INFO L226 Difference]: Without dead ends: 95666 [2021-06-05 06:23:43,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 933.1ms TimeCoverageRelationStatistics Valid=402, Invalid=1950, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:23:43,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95666 states. [2021-06-05 06:23:44,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95666 to 39753. [2021-06-05 06:23:44,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39753 states, 39752 states have (on average 4.149049104447575) internal successors, (164933), 39752 states have internal predecessors, (164933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:44,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39753 states to 39753 states and 164933 transitions. [2021-06-05 06:23:44,752 INFO L78 Accepts]: Start accepts. Automaton has 39753 states and 164933 transitions. Word has length 39 [2021-06-05 06:23:44,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:44,753 INFO L482 AbstractCegarLoop]: Abstraction has 39753 states and 164933 transitions. [2021-06-05 06:23:44,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:44,753 INFO L276 IsEmpty]: Start isEmpty. Operand 39753 states and 164933 transitions. [2021-06-05 06:23:44,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:23:44,822 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:44,822 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:45,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 06:23:45,022 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:45,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:45,023 INFO L82 PathProgramCache]: Analyzing trace with hash 449743517, now seen corresponding path program 50 times [2021-06-05 06:23:45,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:45,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100174503] [2021-06-05 06:23:45,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:45,365 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-06-05 06:23:45,593 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:45,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:45,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100174503] [2021-06-05 06:23:45,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100174503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:45,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508671741] [2021-06-05 06:23:45,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:45,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:23:45,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:45,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:23:45,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:45,806 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:23:45,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:23:45,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:45,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:45,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:45,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-06-05 06:23:45,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:23:45,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:45,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:45,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:45,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:23:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:45,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508671741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:45,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:45,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:23:45,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93628895] [2021-06-05 06:23:45,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:23:45,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:45,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:23:45,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:23:45,881 INFO L87 Difference]: Start difference. First operand 39753 states and 164933 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:47,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:47,549 INFO L93 Difference]: Finished difference Result 72095 states and 294855 transitions. [2021-06-05 06:23:47,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:23:47,550 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:23:47,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:47,742 INFO L225 Difference]: With dead ends: 72095 [2021-06-05 06:23:47,742 INFO L226 Difference]: Without dead ends: 71847 [2021-06-05 06:23:47,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1253.9ms TimeCoverageRelationStatistics Valid=352, Invalid=1628, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 06:23:47,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71847 states. [2021-06-05 06:23:48,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71847 to 39939. [2021-06-05 06:23:48,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39939 states, 39938 states have (on average 4.147253242525915) internal successors, (165633), 39938 states have internal predecessors, (165633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:48,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39939 states to 39939 states and 165633 transitions. [2021-06-05 06:23:48,875 INFO L78 Accepts]: Start accepts. Automaton has 39939 states and 165633 transitions. Word has length 39 [2021-06-05 06:23:48,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:48,875 INFO L482 AbstractCegarLoop]: Abstraction has 39939 states and 165633 transitions. [2021-06-05 06:23:48,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:48,875 INFO L276 IsEmpty]: Start isEmpty. Operand 39939 states and 165633 transitions. [2021-06-05 06:23:48,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:23:48,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:48,947 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:49,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 06:23:49,149 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:49,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:49,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1828137727, now seen corresponding path program 51 times [2021-06-05 06:23:49,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:49,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673989217] [2021-06-05 06:23:49,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:49,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:49,413 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:49,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:49,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673989217] [2021-06-05 06:23:49,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673989217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:49,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903264858] [2021-06-05 06:23:49,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:49,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:23:49,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:49,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 06:23:49,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:49,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:49,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 06:23:49,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:49,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:49,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:23:49,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:68 [2021-06-05 06:23:49,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:49,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:49,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 45 [2021-06-05 06:23:49,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:49,847 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 06:23:49,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-06-05 06:23:49,848 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:49,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:49,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:49,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 54 [2021-06-05 06:23:49,863 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:49,870 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 06:23:49,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:23:49,871 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:49,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:49,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 06:23:49,954 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:241, output treesize:212 [2021-06-05 06:23:50,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:50,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:23:50,164 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:50,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:50,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:50,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:45 [2021-06-05 06:23:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:50,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903264858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:50,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:50,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-06-05 06:23:50,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470757760] [2021-06-05 06:23:50,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 06:23:50,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:50,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 06:23:50,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:23:50,269 INFO L87 Difference]: Start difference. First operand 39939 states and 165633 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:54,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:54,698 INFO L93 Difference]: Finished difference Result 80410 states and 324461 transitions. [2021-06-05 06:23:54,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 06:23:54,699 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:23:54,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:54,919 INFO L225 Difference]: With dead ends: 80410 [2021-06-05 06:23:54,919 INFO L226 Difference]: Without dead ends: 80120 [2021-06-05 06:23:54,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2239 ImplicationChecksByTransitivity, 3404.9ms TimeCoverageRelationStatistics Valid=1141, Invalid=5831, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 06:23:55,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80120 states. [2021-06-05 06:23:55,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80120 to 39885. [2021-06-05 06:23:55,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39885 states, 39884 states have (on average 4.14775348510681) internal successors, (165429), 39884 states have internal predecessors, (165429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:56,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39885 states to 39885 states and 165429 transitions. [2021-06-05 06:23:56,073 INFO L78 Accepts]: Start accepts. Automaton has 39885 states and 165429 transitions. Word has length 39 [2021-06-05 06:23:56,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:56,073 INFO L482 AbstractCegarLoop]: Abstraction has 39885 states and 165429 transitions. [2021-06-05 06:23:56,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:56,074 INFO L276 IsEmpty]: Start isEmpty. Operand 39885 states and 165429 transitions. [2021-06-05 06:23:56,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:23:56,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:56,142 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:56,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-06-05 06:23:56,342 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:56,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:56,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1624216981, now seen corresponding path program 52 times [2021-06-05 06:23:56,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:56,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830649312] [2021-06-05 06:23:56,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:56,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:56,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:56,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830649312] [2021-06-05 06:23:56,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830649312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:56,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463475208] [2021-06-05 06:23:56,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:56,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:23:56,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:56,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:23:56,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:56,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:23:56,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:56,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:56,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:56,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 06:23:56,874 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:23:56,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:23:56,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:56,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:56,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:56,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:23:56,918 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:56,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463475208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:56,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:56,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:23:56,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464978722] [2021-06-05 06:23:56,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:23:56,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:56,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:23:56,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:23:56,919 INFO L87 Difference]: Start difference. First operand 39885 states and 165429 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:58,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:58,550 INFO L93 Difference]: Finished difference Result 74871 states and 306050 transitions. [2021-06-05 06:23:58,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:23:58,551 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:23:58,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:58,758 INFO L225 Difference]: With dead ends: 74871 [2021-06-05 06:23:58,758 INFO L226 Difference]: Without dead ends: 74781 [2021-06-05 06:23:58,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 887.2ms TimeCoverageRelationStatistics Valid=336, Invalid=1556, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:23:58,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74781 states. [2021-06-05 06:23:59,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74781 to 40001. [2021-06-05 06:23:59,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40001 states, 40000 states have (on average 4.148125) internal successors, (165925), 40000 states have internal predecessors, (165925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:59,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40001 states to 40001 states and 165925 transitions. [2021-06-05 06:23:59,934 INFO L78 Accepts]: Start accepts. Automaton has 40001 states and 165925 transitions. Word has length 39 [2021-06-05 06:23:59,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:59,934 INFO L482 AbstractCegarLoop]: Abstraction has 40001 states and 165925 transitions. [2021-06-05 06:23:59,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:59,935 INFO L276 IsEmpty]: Start isEmpty. Operand 40001 states and 165925 transitions. [2021-06-05 06:24:00,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:24:00,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:00,004 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:00,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:00,209 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:00,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:00,209 INFO L82 PathProgramCache]: Analyzing trace with hash 539098859, now seen corresponding path program 53 times [2021-06-05 06:24:00,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:00,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631031180] [2021-06-05 06:24:00,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:00,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:00,550 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-06-05 06:24:00,776 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:00,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:00,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631031180] [2021-06-05 06:24:00,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631031180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:00,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528790053] [2021-06-05 06:24:00,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:00,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:24:00,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:00,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 06:24:00,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:01,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:24:01,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:01,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:01,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:24:01,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:44 [2021-06-05 06:24:01,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:01,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 06:24:01,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:01,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:01,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:24:01,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:37 [2021-06-05 06:24:01,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:01,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:01,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:01,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:01,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-06-05 06:24:01,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:24:01,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:01,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:24:01,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 06:24:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:01,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528790053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:01,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:01,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:24:01,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770307052] [2021-06-05 06:24:01,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:24:01,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:01,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:24:01,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:24:01,269 INFO L87 Difference]: Start difference. First operand 40001 states and 165925 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:08,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:08,546 INFO L93 Difference]: Finished difference Result 127219 states and 517154 transitions. [2021-06-05 06:24:08,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 06:24:08,547 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:24:08,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:08,921 INFO L225 Difference]: With dead ends: 127219 [2021-06-05 06:24:08,921 INFO L226 Difference]: Without dead ends: 126796 [2021-06-05 06:24:08,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3618 ImplicationChecksByTransitivity, 4755.7ms TimeCoverageRelationStatistics Valid=1727, Invalid=9829, Unknown=0, NotChecked=0, Total=11556 [2021-06-05 06:24:09,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126796 states. [2021-06-05 06:24:10,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126796 to 40288. [2021-06-05 06:24:10,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40288 states, 40287 states have (on average 4.146747089631891) internal successors, (167060), 40287 states have internal predecessors, (167060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:10,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40288 states to 40288 states and 167060 transitions. [2021-06-05 06:24:10,725 INFO L78 Accepts]: Start accepts. Automaton has 40288 states and 167060 transitions. Word has length 39 [2021-06-05 06:24:10,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:10,726 INFO L482 AbstractCegarLoop]: Abstraction has 40288 states and 167060 transitions. [2021-06-05 06:24:10,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:10,726 INFO L276 IsEmpty]: Start isEmpty. Operand 40288 states and 167060 transitions. [2021-06-05 06:24:10,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:24:10,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:10,798 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:11,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:11,005 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:11,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:11,005 INFO L82 PathProgramCache]: Analyzing trace with hash 140092723, now seen corresponding path program 54 times [2021-06-05 06:24:11,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:11,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721834308] [2021-06-05 06:24:11,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:11,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:11,216 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:11,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:11,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721834308] [2021-06-05 06:24:11,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721834308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:11,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913143123] [2021-06-05 06:24:11,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:11,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:24:11,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:11,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 06:24:11,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:11,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:24:11,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:11,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:11,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:11,396 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:31 [2021-06-05 06:24:11,446 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:24:11,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 06:24:11,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:11,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:11,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:11,450 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:18 [2021-06-05 06:24:11,530 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:11,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913143123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:11,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:11,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 06:24:11,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660808953] [2021-06-05 06:24:11,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:24:11,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:11,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:24:11,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:24:11,531 INFO L87 Difference]: Start difference. First operand 40288 states and 167060 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:13,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:13,294 INFO L93 Difference]: Finished difference Result 88172 states and 363044 transitions. [2021-06-05 06:24:13,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:24:13,294 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:24:13,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:13,537 INFO L225 Difference]: With dead ends: 88172 [2021-06-05 06:24:13,538 INFO L226 Difference]: Without dead ends: 88117 [2021-06-05 06:24:13,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 872.8ms TimeCoverageRelationStatistics Valid=335, Invalid=2017, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:24:13,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88117 states. [2021-06-05 06:24:14,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88117 to 41912. [2021-06-05 06:24:14,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41912 states, 41911 states have (on average 4.144592111856076) internal successors, (173704), 41911 states have internal predecessors, (173704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:14,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41912 states to 41912 states and 173704 transitions. [2021-06-05 06:24:14,748 INFO L78 Accepts]: Start accepts. Automaton has 41912 states and 173704 transitions. Word has length 39 [2021-06-05 06:24:14,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:14,748 INFO L482 AbstractCegarLoop]: Abstraction has 41912 states and 173704 transitions. [2021-06-05 06:24:14,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:14,749 INFO L276 IsEmpty]: Start isEmpty. Operand 41912 states and 173704 transitions. [2021-06-05 06:24:14,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:24:14,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:14,820 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:15,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:15,020 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:15,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:15,020 INFO L82 PathProgramCache]: Analyzing trace with hash -497495307, now seen corresponding path program 55 times [2021-06-05 06:24:15,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:15,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763546680] [2021-06-05 06:24:15,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:15,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:15,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:15,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763546680] [2021-06-05 06:24:15,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763546680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:15,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811424081] [2021-06-05 06:24:15,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:15,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:24:15,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:15,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:24:15,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:15,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:15,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:15,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-06-05 06:24:15,493 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:24:15,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:24:15,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:15,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:15,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:15,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:24:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:15,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811424081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:15,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:15,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-06-05 06:24:15,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510993063] [2021-06-05 06:24:15,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:24:15,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:15,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:24:15,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:24:15,524 INFO L87 Difference]: Start difference. First operand 41912 states and 173704 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:16,238 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-06-05 06:24:17,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:17,625 INFO L93 Difference]: Finished difference Result 96411 states and 397709 transitions. [2021-06-05 06:24:17,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:24:17,625 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:24:17,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:17,897 INFO L225 Difference]: With dead ends: 96411 [2021-06-05 06:24:17,897 INFO L226 Difference]: Without dead ends: 96356 [2021-06-05 06:24:17,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 971.1ms TimeCoverageRelationStatistics Valid=269, Invalid=1623, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:24:18,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96356 states. [2021-06-05 06:24:19,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96356 to 43963. [2021-06-05 06:24:19,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43963 states, 43962 states have (on average 4.147149811200582) internal successors, (182317), 43962 states have internal predecessors, (182317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:19,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43963 states to 43963 states and 182317 transitions. [2021-06-05 06:24:19,516 INFO L78 Accepts]: Start accepts. Automaton has 43963 states and 182317 transitions. Word has length 39 [2021-06-05 06:24:19,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:19,517 INFO L482 AbstractCegarLoop]: Abstraction has 43963 states and 182317 transitions. [2021-06-05 06:24:19,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:19,517 INFO L276 IsEmpty]: Start isEmpty. Operand 43963 states and 182317 transitions. [2021-06-05 06:24:19,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:24:19,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:19,595 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:19,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:19,795 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:19,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:19,795 INFO L82 PathProgramCache]: Analyzing trace with hash 921497717, now seen corresponding path program 56 times [2021-06-05 06:24:19,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:19,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819563379] [2021-06-05 06:24:19,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:19,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:20,032 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:20,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:20,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819563379] [2021-06-05 06:24:20,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819563379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:20,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313620730] [2021-06-05 06:24:20,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:20,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:24:20,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:20,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:24:20,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:20,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:24:20,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:20,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:20,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:20,216 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-06-05 06:24:20,296 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:24:20,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:24:20,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:20,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:20,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:20,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:24:20,326 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:20,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313620730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:20,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:20,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-06-05 06:24:20,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914150739] [2021-06-05 06:24:20,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:24:20,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:20,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:24:20,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:24:20,327 INFO L87 Difference]: Start difference. First operand 43963 states and 182317 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:22,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:22,161 INFO L93 Difference]: Finished difference Result 93435 states and 385265 transitions. [2021-06-05 06:24:22,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:24:22,161 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:24:22,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:22,434 INFO L225 Difference]: With dead ends: 93435 [2021-06-05 06:24:22,434 INFO L226 Difference]: Without dead ends: 93380 [2021-06-05 06:24:22,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 778.8ms TimeCoverageRelationStatistics Valid=274, Invalid=1618, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:24:22,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93380 states. [2021-06-05 06:24:23,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93380 to 42897. [2021-06-05 06:24:23,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42897 states, 42896 states have (on average 4.143673069750093) internal successors, (177747), 42896 states have internal predecessors, (177747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:23,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42897 states to 42897 states and 177747 transitions. [2021-06-05 06:24:23,735 INFO L78 Accepts]: Start accepts. Automaton has 42897 states and 177747 transitions. Word has length 39 [2021-06-05 06:24:23,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:23,735 INFO L482 AbstractCegarLoop]: Abstraction has 42897 states and 177747 transitions. [2021-06-05 06:24:23,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:23,735 INFO L276 IsEmpty]: Start isEmpty. Operand 42897 states and 177747 transitions. [2021-06-05 06:24:23,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:24:23,809 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:23,809 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:24,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:24,010 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:24,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:24,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1615119669, now seen corresponding path program 57 times [2021-06-05 06:24:24,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:24,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702434538] [2021-06-05 06:24:24,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:24,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:24,223 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:24,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:24,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702434538] [2021-06-05 06:24:24,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702434538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:24,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031882187] [2021-06-05 06:24:24,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:24:24,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:24:24,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:24,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 06:24:24,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:24,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:24,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 06:24:24,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:24,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:24,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:24,446 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:63 [2021-06-05 06:24:24,857 INFO L244 Elim1Store]: Index analysis took 233 ms [2021-06-05 06:24:24,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:24,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-06-05 06:24:24,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:24:24,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:24,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:24,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-06-05 06:24:24,882 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:24,890 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 06:24:24,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 06:24:24,891 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:24,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:24,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:24:24,930 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:157, output treesize:159 [2021-06-05 06:24:25,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:25,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:24:25,036 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:24:25,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:25,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:25,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 06:24:25,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:25,081 INFO L628 ElimStorePlain]: treesize reduction 10, result has 78.3 percent of original size [2021-06-05 06:24:25,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:24:25,083 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:37 [2021-06-05 06:24:25,134 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:25,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031882187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:25,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:25,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:24:25,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484250175] [2021-06-05 06:24:25,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:24:25,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:25,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:24:25,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:24:25,135 INFO L87 Difference]: Start difference. First operand 42897 states and 177747 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:29,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:29,699 INFO L93 Difference]: Finished difference Result 91613 states and 374483 transitions. [2021-06-05 06:24:29,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 06:24:29,699 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:24:29,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:30,089 INFO L225 Difference]: With dead ends: 91613 [2021-06-05 06:24:30,089 INFO L226 Difference]: Without dead ends: 91519 [2021-06-05 06:24:30,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2094 ImplicationChecksByTransitivity, 3390.3ms TimeCoverageRelationStatistics Valid=844, Invalid=5636, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 06:24:30,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91519 states. [2021-06-05 06:24:30,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91519 to 43369. [2021-06-05 06:24:30,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43369 states, 43368 states have (on average 4.142778085224128) internal successors, (179664), 43368 states have internal predecessors, (179664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:31,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43369 states to 43369 states and 179664 transitions. [2021-06-05 06:24:31,347 INFO L78 Accepts]: Start accepts. Automaton has 43369 states and 179664 transitions. Word has length 39 [2021-06-05 06:24:31,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:31,347 INFO L482 AbstractCegarLoop]: Abstraction has 43369 states and 179664 transitions. [2021-06-05 06:24:31,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:31,348 INFO L276 IsEmpty]: Start isEmpty. Operand 43369 states and 179664 transitions. [2021-06-05 06:24:31,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:24:31,422 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:31,422 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:31,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:31,623 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:31,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:31,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1260854603, now seen corresponding path program 58 times [2021-06-05 06:24:31,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:31,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098901302] [2021-06-05 06:24:31,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:31,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:31,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:31,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098901302] [2021-06-05 06:24:31,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098901302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:31,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884234495] [2021-06-05 06:24:31,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:31,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:24:31,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:31,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:24:31,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:32,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:24:32,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:32,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:32,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:32,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-06-05 06:24:32,103 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:24:32,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:24:32,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:32,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:32,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:32,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:24:32,133 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:32,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884234495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:32,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:32,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-06-05 06:24:32,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701928285] [2021-06-05 06:24:32,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:24:32,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:32,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:24:32,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:24:32,134 INFO L87 Difference]: Start difference. First operand 43369 states and 179664 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:33,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:33,812 INFO L93 Difference]: Finished difference Result 93784 states and 387024 transitions. [2021-06-05 06:24:33,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:24:33,812 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:24:33,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:34,082 INFO L225 Difference]: With dead ends: 93784 [2021-06-05 06:24:34,082 INFO L226 Difference]: Without dead ends: 93729 [2021-06-05 06:24:34,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 715.5ms TimeCoverageRelationStatistics Valid=234, Invalid=1488, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:24:34,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93729 states. [2021-06-05 06:24:35,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93729 to 43785. [2021-06-05 06:24:35,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43785 states, 43784 states have (on average 4.146080760095012) internal successors, (181532), 43784 states have internal predecessors, (181532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:35,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43785 states to 43785 states and 181532 transitions. [2021-06-05 06:24:35,408 INFO L78 Accepts]: Start accepts. Automaton has 43785 states and 181532 transitions. Word has length 39 [2021-06-05 06:24:35,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:35,408 INFO L482 AbstractCegarLoop]: Abstraction has 43785 states and 181532 transitions. [2021-06-05 06:24:35,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:35,409 INFO L276 IsEmpty]: Start isEmpty. Operand 43785 states and 181532 transitions. [2021-06-05 06:24:35,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:24:35,485 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:35,485 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:35,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 06:24:35,686 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:35,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:35,686 INFO L82 PathProgramCache]: Analyzing trace with hash -595147851, now seen corresponding path program 59 times [2021-06-05 06:24:35,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:35,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534425445] [2021-06-05 06:24:35,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:35,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:35,927 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:35,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:35,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534425445] [2021-06-05 06:24:35,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534425445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:35,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372560945] [2021-06-05 06:24:35,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:35,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:24:35,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:35,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 06:24:35,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:36,193 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:36,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 53 [2021-06-05 06:24:36,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:36,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:36,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:24:36,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:188 [2021-06-05 06:24:37,149 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-06-05 06:24:37,882 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 06:24:38,148 INFO L446 ElimStorePlain]: Different costs {1=[q2, v_prenex_71, v_prenex_53, v_prenex_74, v_prenex_62, v_prenex_68, v_prenex_56, v_prenex_77], 3=[v_prenex_83, v_prenex_80, v_prenex_65, v_prenex_86, v_prenex_59]} [2021-06-05 06:24:38,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:38,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 06:24:38,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:38,353 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2021-06-05 06:24:38,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:38,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:38,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2021-06-05 06:24:38,365 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:38,676 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2021-06-05 06:24:38,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:38,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:38,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2021-06-05 06:24:38,689 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:38,871 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2021-06-05 06:24:38,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:38,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:38,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2021-06-05 06:24:38,882 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:39,052 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2021-06-05 06:24:39,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:39,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:39,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 06:24:39,063 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:39,235 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2021-06-05 06:24:39,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:39,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:39,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2021-06-05 06:24:39,246 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:39,407 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2021-06-05 06:24:39,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:39,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:39,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2021-06-05 06:24:39,421 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:39,574 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2021-06-05 06:24:39,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:39,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:39,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2021-06-05 06:24:39,586 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:39,737 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2021-06-05 06:24:39,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:39,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:39,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:39,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:24:39,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:24:39,749 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:39,889 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-06-05 06:24:39,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:39,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:39,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:24:39,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 06:24:39,900 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:40,035 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-06-05 06:24:40,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:40,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:40,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:24:40,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 06:24:40,046 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:40,173 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-06-05 06:24:40,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:40,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:40,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:24:40,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2021-06-05 06:24:40,183 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:40,307 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-06-05 06:24:40,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:40,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:40,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:40,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:24:40,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2021-06-05 06:24:40,317 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:40,433 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-05 06:24:40,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:40,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 31 dim-0 vars, 13 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 06:24:40,442 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 44 variables, input treesize:660, output treesize:263 [2021-06-05 06:24:40,743 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_91, v_prenex_90], 3=[v_prenex_94, q1], 6=[v_prenex_93, v_prenex_92, v_prenex_89]} [2021-06-05 06:24:40,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:40,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 06:24:40,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:40,942 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2021-06-05 06:24:40,943 INFO L628 ElimStorePlain]: treesize reduction 33, result has 90.7 percent of original size [2021-06-05 06:24:40,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:40,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 06:24:40,949 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:41,101 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-06-05 06:24:41,102 INFO L628 ElimStorePlain]: treesize reduction 42, result has 86.5 percent of original size [2021-06-05 06:24:41,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:41,117 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:41,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 32 [2021-06-05 06:24:41,119 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:41,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:41,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:41,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:41,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 32 [2021-06-05 06:24:41,209 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:41,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:41,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:41,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:41,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:41,300 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:41,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-06-05 06:24:41,303 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 06:24:41,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:41,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:41,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:41,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:41,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:41,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-06-05 06:24:41,385 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 06:24:41,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:41,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:41,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:41,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:41,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:41,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 45 [2021-06-05 06:24:41,463 INFO L550 ElimStorePlain]: Start of recursive call 8: 2 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:24:41,546 INFO L628 ElimStorePlain]: treesize reduction 64, result has 66.0 percent of original size [2021-06-05 06:24:41,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 7 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 06:24:41,550 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:367, output treesize:119 [2021-06-05 06:24:41,673 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:41,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372560945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:41,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:41,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:24:41,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499657570] [2021-06-05 06:24:41,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:24:41,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:41,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:24:41,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:24:41,674 INFO L87 Difference]: Start difference. First operand 43785 states and 181532 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:43,004 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 93 [2021-06-05 06:24:43,460 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 55 [2021-06-05 06:24:43,910 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 82 [2021-06-05 06:24:44,481 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 50 [2021-06-05 06:24:44,813 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2021-06-05 06:24:44,986 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 50 [2021-06-05 06:24:46,102 WARN L205 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 148 [2021-06-05 06:24:46,484 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2021-06-05 06:24:46,691 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2021-06-05 06:24:46,934 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-06-05 06:24:47,416 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 124 [2021-06-05 06:24:47,879 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-06-05 06:24:48,370 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 83 [2021-06-05 06:24:48,633 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-06-05 06:24:49,078 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 85 [2021-06-05 06:24:49,727 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 121 [2021-06-05 06:24:50,219 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 06:24:50,598 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 120 [2021-06-05 06:24:51,093 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-06-05 06:24:51,572 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2021-06-05 06:24:52,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:52,008 INFO L93 Difference]: Finished difference Result 73069 states and 297530 transitions. [2021-06-05 06:24:52,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 06:24:52,008 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:24:52,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:52,208 INFO L225 Difference]: With dead ends: 73069 [2021-06-05 06:24:52,208 INFO L226 Difference]: Without dead ends: 72920 [2021-06-05 06:24:52,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 17 SyntacticMatches, 8 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2580 ImplicationChecksByTransitivity, 9657.7ms TimeCoverageRelationStatistics Valid=1078, Invalid=7112, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 06:24:52,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72920 states. [2021-06-05 06:24:53,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72920 to 44157. [2021-06-05 06:24:53,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44157 states, 44156 states have (on average 4.145099193767551) internal successors, (183031), 44156 states have internal predecessors, (183031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:53,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44157 states to 44157 states and 183031 transitions. [2021-06-05 06:24:53,411 INFO L78 Accepts]: Start accepts. Automaton has 44157 states and 183031 transitions. Word has length 39 [2021-06-05 06:24:53,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:53,411 INFO L482 AbstractCegarLoop]: Abstraction has 44157 states and 183031 transitions. [2021-06-05 06:24:53,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:53,411 INFO L276 IsEmpty]: Start isEmpty. Operand 44157 states and 183031 transitions. [2021-06-05 06:24:53,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:24:53,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:53,488 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:53,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 06:24:53,688 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:53,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:53,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1535515861, now seen corresponding path program 60 times [2021-06-05 06:24:53,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:53,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455396437] [2021-06-05 06:24:53,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:53,918 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:53,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:53,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455396437] [2021-06-05 06:24:53,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455396437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:53,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618090086] [2021-06-05 06:24:53,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:53,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:24:53,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:53,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 06:24:53,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:54,149 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:54,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-06-05 06:24:54,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:54,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:54,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:54,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:56 [2021-06-05 06:24:54,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:54,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 29 [2021-06-05 06:24:54,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:54,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:54,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 06:24:54,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:54,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:54,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 06:24:54,328 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:54,331 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:24:54,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 06:24:54,332 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:54,373 INFO L628 ElimStorePlain]: treesize reduction 38, result has 67.0 percent of original size [2021-06-05 06:24:54,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:24:54,374 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:229, output treesize:73 [2021-06-05 06:24:54,439 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:54,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:24:54,440 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:24:54,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:54,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:54,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 06:24:54,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:54,524 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.1 percent of original size [2021-06-05 06:24:54,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:24:54,527 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:94, output treesize:76 [2021-06-05 06:24:54,653 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:54,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618090086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:54,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:54,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-06-05 06:24:54,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279738742] [2021-06-05 06:24:54,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:24:54,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:54,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:24:54,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:24:54,654 INFO L87 Difference]: Start difference. First operand 44157 states and 183031 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:56,133 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-06-05 06:24:56,889 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 59 [2021-06-05 06:24:57,103 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-06-05 06:24:57,292 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2021-06-05 06:24:58,406 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2021-06-05 06:24:58,811 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2021-06-05 06:25:00,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:00,333 INFO L93 Difference]: Finished difference Result 121401 states and 487585 transitions. [2021-06-05 06:25:00,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 06:25:00,333 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:25:00,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:00,858 INFO L225 Difference]: With dead ends: 121401 [2021-06-05 06:25:00,858 INFO L226 Difference]: Without dead ends: 121303 [2021-06-05 06:25:00,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2622 ImplicationChecksByTransitivity, 4384.1ms TimeCoverageRelationStatistics Valid=1340, Invalid=6316, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 06:25:00,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121303 states. [2021-06-05 06:25:02,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121303 to 44145. [2021-06-05 06:25:02,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44145 states, 44144 states have (on average 4.141718013773106) internal successors, (182832), 44144 states have internal predecessors, (182832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:02,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44145 states to 44145 states and 182832 transitions. [2021-06-05 06:25:02,400 INFO L78 Accepts]: Start accepts. Automaton has 44145 states and 182832 transitions. Word has length 39 [2021-06-05 06:25:02,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:02,400 INFO L482 AbstractCegarLoop]: Abstraction has 44145 states and 182832 transitions. [2021-06-05 06:25:02,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:02,401 INFO L276 IsEmpty]: Start isEmpty. Operand 44145 states and 182832 transitions. [2021-06-05 06:25:02,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:25:02,490 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:02,491 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:02,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:02,691 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:02,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:02,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1689999629, now seen corresponding path program 61 times [2021-06-05 06:25:02,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:02,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780802393] [2021-06-05 06:25:02,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:02,933 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:02,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:02,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780802393] [2021-06-05 06:25:02,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780802393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:02,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653100523] [2021-06-05 06:25:02,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:02,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:02,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:25:02,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:03,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:25:03,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:03,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:03,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:03,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-06-05 06:25:03,144 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:25:03,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 06:25:03,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:03,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:03,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:03,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-06-05 06:25:03,197 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:03,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653100523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:03,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:03,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:25:03,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67494715] [2021-06-05 06:25:03,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:25:03,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:03,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:25:03,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:25:03,198 INFO L87 Difference]: Start difference. First operand 44145 states and 182832 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:06,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:06,343 INFO L93 Difference]: Finished difference Result 133350 states and 541838 transitions. [2021-06-05 06:25:06,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:25:06,344 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:25:06,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:06,764 INFO L225 Difference]: With dead ends: 133350 [2021-06-05 06:25:06,764 INFO L226 Difference]: Without dead ends: 133295 [2021-06-05 06:25:06,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1505.9ms TimeCoverageRelationStatistics Valid=524, Invalid=2446, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:25:06,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133295 states. [2021-06-05 06:25:08,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133295 to 44007. [2021-06-05 06:25:08,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44007 states, 44006 states have (on average 4.144321228923329) internal successors, (182375), 44006 states have internal predecessors, (182375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:08,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44007 states to 44007 states and 182375 transitions. [2021-06-05 06:25:08,497 INFO L78 Accepts]: Start accepts. Automaton has 44007 states and 182375 transitions. Word has length 39 [2021-06-05 06:25:08,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:08,497 INFO L482 AbstractCegarLoop]: Abstraction has 44007 states and 182375 transitions. [2021-06-05 06:25:08,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:08,497 INFO L276 IsEmpty]: Start isEmpty. Operand 44007 states and 182375 transitions. [2021-06-05 06:25:08,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:25:08,575 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:08,575 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:08,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:08,776 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:08,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:08,777 INFO L82 PathProgramCache]: Analyzing trace with hash 541818871, now seen corresponding path program 62 times [2021-06-05 06:25:08,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:08,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232414657] [2021-06-05 06:25:08,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:08,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:09,011 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:09,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:09,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232414657] [2021-06-05 06:25:09,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232414657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:09,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315678682] [2021-06-05 06:25:09,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:09,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:25:09,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:09,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:25:09,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:09,467 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-06-05 06:25:09,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:25:09,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:09,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:09,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:09,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-06-05 06:25:09,578 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:25:09,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:25:09,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:09,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:09,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:09,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:25:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:09,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315678682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:09,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:09,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:25:09,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605621858] [2021-06-05 06:25:09,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:25:09,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:09,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:25:09,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:25:09,618 INFO L87 Difference]: Start difference. First operand 44007 states and 182375 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:11,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:11,178 INFO L93 Difference]: Finished difference Result 87410 states and 359253 transitions. [2021-06-05 06:25:11,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:25:11,179 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:25:11,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:11,674 INFO L225 Difference]: With dead ends: 87410 [2021-06-05 06:25:11,674 INFO L226 Difference]: Without dead ends: 87355 [2021-06-05 06:25:11,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1088.7ms TimeCoverageRelationStatistics Valid=358, Invalid=1448, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:25:11,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87355 states. [2021-06-05 06:25:12,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87355 to 43555. [2021-06-05 06:25:12,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43555 states, 43554 states have (on average 4.145864903338385) internal successors, (180569), 43554 states have internal predecessors, (180569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:12,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43555 states to 43555 states and 180569 transitions. [2021-06-05 06:25:12,987 INFO L78 Accepts]: Start accepts. Automaton has 43555 states and 180569 transitions. Word has length 39 [2021-06-05 06:25:12,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:12,987 INFO L482 AbstractCegarLoop]: Abstraction has 43555 states and 180569 transitions. [2021-06-05 06:25:12,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:12,987 INFO L276 IsEmpty]: Start isEmpty. Operand 43555 states and 180569 transitions. [2021-06-05 06:25:13,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:25:13,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:13,065 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:13,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 06:25:13,267 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:13,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:13,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1810207527, now seen corresponding path program 63 times [2021-06-05 06:25:13,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:13,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398072215] [2021-06-05 06:25:13,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:13,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:13,589 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:13,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:13,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398072215] [2021-06-05 06:25:13,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398072215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:13,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824628024] [2021-06-05 06:25:13,589 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 [2021-06-05 06:25:13,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:25:13,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:13,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 06:25:13,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:13,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:13,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:13,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-06-05 06:25:13,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:13,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:13,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:13,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:109 [2021-06-05 06:25:14,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:14,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:14,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:25:14,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:14,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:14,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:14,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:9 [2021-06-05 06:25:14,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:14,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:25:14,048 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:25:14,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:14,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:25:14,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 06:25:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:14,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824628024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:14,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:14,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 06:25:14,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270519083] [2021-06-05 06:25:14,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 06:25:14,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:14,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 06:25:14,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:25:14,100 INFO L87 Difference]: Start difference. First operand 43555 states and 180569 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:17,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:17,437 INFO L93 Difference]: Finished difference Result 74741 states and 304515 transitions. [2021-06-05 06:25:17,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 06:25:17,437 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:25:17,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:17,809 INFO L225 Difference]: With dead ends: 74741 [2021-06-05 06:25:17,809 INFO L226 Difference]: Without dead ends: 74548 [2021-06-05 06:25:17,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1628 ImplicationChecksByTransitivity, 2162.8ms TimeCoverageRelationStatistics Valid=746, Invalid=4656, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 06:25:17,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74548 states. [2021-06-05 06:25:18,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74548 to 44107. [2021-06-05 06:25:18,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44107 states, 44106 states have (on average 4.139346120709201) internal successors, (182570), 44106 states have internal predecessors, (182570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:19,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44107 states to 44107 states and 182570 transitions. [2021-06-05 06:25:19,007 INFO L78 Accepts]: Start accepts. Automaton has 44107 states and 182570 transitions. Word has length 39 [2021-06-05 06:25:19,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:19,007 INFO L482 AbstractCegarLoop]: Abstraction has 44107 states and 182570 transitions. [2021-06-05 06:25:19,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:19,008 INFO L276 IsEmpty]: Start isEmpty. Operand 44107 states and 182570 transitions. [2021-06-05 06:25:19,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:25:19,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:19,095 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:19,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 06:25:19,296 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:19,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:19,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1423700779, now seen corresponding path program 64 times [2021-06-05 06:25:19,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:19,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717114338] [2021-06-05 06:25:19,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:19,596 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:19,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:19,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717114338] [2021-06-05 06:25:19,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717114338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:19,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876253989] [2021-06-05 06:25:19,596 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 [2021-06-05 06:25:19,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:25:19,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:19,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:25:19,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:19,819 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:25:19,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:25:19,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:19,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:19,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:19,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 06:25:19,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:25:19,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:19,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:19,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:19,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:25:19,891 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:19,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876253989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:19,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:19,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:25:19,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477571089] [2021-06-05 06:25:19,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:25:19,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:19,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:25:19,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:25:19,892 INFO L87 Difference]: Start difference. First operand 44107 states and 182570 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:21,534 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-06-05 06:25:22,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:22,326 INFO L93 Difference]: Finished difference Result 91988 states and 374364 transitions. [2021-06-05 06:25:22,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:25:22,326 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:25:22,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:22,601 INFO L225 Difference]: With dead ends: 91988 [2021-06-05 06:25:22,601 INFO L226 Difference]: Without dead ends: 91764 [2021-06-05 06:25:22,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 1472.8ms TimeCoverageRelationStatistics Valid=478, Invalid=2714, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 06:25:22,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91764 states. [2021-06-05 06:25:23,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91764 to 43885. [2021-06-05 06:25:23,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43885 states, 43884 states have (on average 4.1429450369155045) internal successors, (181809), 43884 states have internal predecessors, (181809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:23,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43885 states to 43885 states and 181809 transitions. [2021-06-05 06:25:23,947 INFO L78 Accepts]: Start accepts. Automaton has 43885 states and 181809 transitions. Word has length 39 [2021-06-05 06:25:23,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:23,947 INFO L482 AbstractCegarLoop]: Abstraction has 43885 states and 181809 transitions. [2021-06-05 06:25:23,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:23,948 INFO L276 IsEmpty]: Start isEmpty. Operand 43885 states and 181809 transitions. [2021-06-05 06:25:24,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:25:24,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:24,026 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:24,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:24,226 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:24,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:24,227 INFO L82 PathProgramCache]: Analyzing trace with hash 206878525, now seen corresponding path program 65 times [2021-06-05 06:25:24,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:24,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308067608] [2021-06-05 06:25:24,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:24,526 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:24,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:24,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308067608] [2021-06-05 06:25:24,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308067608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:24,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65096052] [2021-06-05 06:25:24,526 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 [2021-06-05 06:25:24,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:25:24,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:24,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 06:25:24,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:25,174 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:25,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-06-05 06:25:25,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:25,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:25,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:25:25,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:69, output treesize:68 [2021-06-05 06:25:25,297 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:25,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 06:25:25,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:25:25,318 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 06:25:25,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 41 [2021-06-05 06:25:25,319 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:25,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:25,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 06:25:25,336 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:25,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:25,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 06:25:25,403 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:171, output treesize:101 [2021-06-05 06:25:25,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:25,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:25,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:25,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:25,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-06-05 06:25:25,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:25:25,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:25,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:25:25,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 06:25:25,624 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:25,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65096052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:25,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:25,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:25:25,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533243385] [2021-06-05 06:25:25,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:25:25,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:25,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:25:25,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:25:25,625 INFO L87 Difference]: Start difference. First operand 43885 states and 181809 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:27,191 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2021-06-05 06:25:32,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:32,811 INFO L93 Difference]: Finished difference Result 107672 states and 437153 transitions. [2021-06-05 06:25:32,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 06:25:32,812 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:25:32,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:33,138 INFO L225 Difference]: With dead ends: 107672 [2021-06-05 06:25:33,138 INFO L226 Difference]: Without dead ends: 107189 [2021-06-05 06:25:33,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3493 ImplicationChecksByTransitivity, 4939.6ms TimeCoverageRelationStatistics Valid=1456, Invalid=9464, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 06:25:33,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107189 states. [2021-06-05 06:25:34,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107189 to 44125. [2021-06-05 06:25:34,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44125 states, 44124 states have (on average 4.141079684525429) internal successors, (182721), 44124 states have internal predecessors, (182721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:34,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44125 states to 44125 states and 182721 transitions. [2021-06-05 06:25:34,585 INFO L78 Accepts]: Start accepts. Automaton has 44125 states and 182721 transitions. Word has length 39 [2021-06-05 06:25:34,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:34,586 INFO L482 AbstractCegarLoop]: Abstraction has 44125 states and 182721 transitions. [2021-06-05 06:25:34,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:34,586 INFO L276 IsEmpty]: Start isEmpty. Operand 44125 states and 182721 transitions. [2021-06-05 06:25:34,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:25:34,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:34,661 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:34,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:34,861 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:34,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:34,862 INFO L82 PathProgramCache]: Analyzing trace with hash 410799271, now seen corresponding path program 66 times [2021-06-05 06:25:34,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:34,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549917545] [2021-06-05 06:25:34,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:34,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:35,222 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-06-05 06:25:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:35,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:35,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549917545] [2021-06-05 06:25:35,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549917545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:35,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855952502] [2021-06-05 06:25:35,454 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 [2021-06-05 06:25:35,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:25:35,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:35,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 06:25:35,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:35,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:25:35,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:35,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:35,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:25:35,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:34 [2021-06-05 06:25:35,718 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:25:35,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2021-06-05 06:25:35,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:35,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:35,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:35,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:9 [2021-06-05 06:25:35,743 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:35,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:25:35,744 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:25:35,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:35,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:25:35,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 06:25:35,792 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:35,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855952502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:35,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:35,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 06:25:35,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784236435] [2021-06-05 06:25:35,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:25:35,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:35,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:25:35,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:25:35,793 INFO L87 Difference]: Start difference. First operand 44125 states and 182721 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:37,888 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-06-05 06:25:38,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:38,727 INFO L93 Difference]: Finished difference Result 76655 states and 312209 transitions. [2021-06-05 06:25:38,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:25:38,727 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:25:38,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:38,936 INFO L225 Difference]: With dead ends: 76655 [2021-06-05 06:25:38,936 INFO L226 Difference]: Without dead ends: 76475 [2021-06-05 06:25:38,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 2031.6ms TimeCoverageRelationStatistics Valid=582, Invalid=3078, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 06:25:39,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76475 states. [2021-06-05 06:25:39,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76475 to 44279. [2021-06-05 06:25:39,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44279 states, 44278 states have (on average 4.140227652558833) internal successors, (183321), 44278 states have internal predecessors, (183321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:40,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44279 states to 44279 states and 183321 transitions. [2021-06-05 06:25:40,111 INFO L78 Accepts]: Start accepts. Automaton has 44279 states and 183321 transitions. Word has length 39 [2021-06-05 06:25:40,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:40,111 INFO L482 AbstractCegarLoop]: Abstraction has 44279 states and 183321 transitions. [2021-06-05 06:25:40,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:40,111 INFO L276 IsEmpty]: Start isEmpty. Operand 44279 states and 183321 transitions. [2021-06-05 06:25:40,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:25:40,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:40,191 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:40,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-05 06:25:40,391 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:40,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:40,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1186962653, now seen corresponding path program 67 times [2021-06-05 06:25:40,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:40,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217586981] [2021-06-05 06:25:40,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:40,676 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:40,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:40,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217586981] [2021-06-05 06:25:40,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217586981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:40,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933999880] [2021-06-05 06:25:40,676 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 [2021-06-05 06:25:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:40,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:25:40,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:40,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:25:40,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:40,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:40,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:40,902 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 06:25:40,931 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:25:40,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:25:40,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:40,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:40,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:40,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:25:40,971 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:40,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933999880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:40,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:40,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:25:40,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941539902] [2021-06-05 06:25:40,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:25:40,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:40,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:25:40,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:25:40,972 INFO L87 Difference]: Start difference. First operand 44279 states and 183321 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:41,334 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-06-05 06:25:44,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:44,129 INFO L93 Difference]: Finished difference Result 110930 states and 450910 transitions. [2021-06-05 06:25:44,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:25:44,129 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:25:44,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:44,477 INFO L225 Difference]: With dead ends: 110930 [2021-06-05 06:25:44,478 INFO L226 Difference]: Without dead ends: 110794 [2021-06-05 06:25:44,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 1576.3ms TimeCoverageRelationStatistics Valid=586, Invalid=3074, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 06:25:44,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110794 states. [2021-06-05 06:25:45,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110794 to 44119. [2021-06-05 06:25:45,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44119 states, 44118 states have (on average 4.142005530622422) internal successors, (182737), 44118 states have internal predecessors, (182737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:45,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44119 states to 44119 states and 182737 transitions. [2021-06-05 06:25:45,965 INFO L78 Accepts]: Start accepts. Automaton has 44119 states and 182737 transitions. Word has length 39 [2021-06-05 06:25:45,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:45,965 INFO L482 AbstractCegarLoop]: Abstraction has 44119 states and 182737 transitions. [2021-06-05 06:25:45,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:45,965 INFO L276 IsEmpty]: Start isEmpty. Operand 44119 states and 182737 transitions. [2021-06-05 06:25:46,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:25:46,046 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:46,046 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:46,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2021-06-05 06:25:46,246 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:46,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:46,247 INFO L82 PathProgramCache]: Analyzing trace with hash -303471491, now seen corresponding path program 68 times [2021-06-05 06:25:46,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:46,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252464829] [2021-06-05 06:25:46,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:46,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:46,526 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:46,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:46,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252464829] [2021-06-05 06:25:46,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252464829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:46,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195312631] [2021-06-05 06:25:46,526 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 [2021-06-05 06:25:46,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:25:46,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:46,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:25:46,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:46,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:25:46,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:46,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:46,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:46,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 06:25:46,808 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:25:46,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:25:46,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:46,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:46,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:46,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:25:47,233 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:47,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195312631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:47,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:47,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:25:47,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903725252] [2021-06-05 06:25:47,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:25:47,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:47,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:25:47,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:25:47,234 INFO L87 Difference]: Start difference. First operand 44119 states and 182737 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:49,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:49,384 INFO L93 Difference]: Finished difference Result 98998 states and 403959 transitions. [2021-06-05 06:25:49,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 06:25:49,385 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:25:49,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:49,681 INFO L225 Difference]: With dead ends: 98998 [2021-06-05 06:25:49,681 INFO L226 Difference]: Without dead ends: 98830 [2021-06-05 06:25:49,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 1531.8ms TimeCoverageRelationStatistics Valid=402, Invalid=2354, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:25:49,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98830 states. [2021-06-05 06:25:50,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98830 to 44205. [2021-06-05 06:25:50,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44205 states, 44204 states have (on average 4.143177088046331) internal successors, (183145), 44204 states have internal predecessors, (183145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:51,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44205 states to 44205 states and 183145 transitions. [2021-06-05 06:25:51,049 INFO L78 Accepts]: Start accepts. Automaton has 44205 states and 183145 transitions. Word has length 39 [2021-06-05 06:25:51,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:51,049 INFO L482 AbstractCegarLoop]: Abstraction has 44205 states and 183145 transitions. [2021-06-05 06:25:51,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:51,049 INFO L276 IsEmpty]: Start isEmpty. Operand 44205 states and 183145 transitions. [2021-06-05 06:25:51,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:25:51,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:51,123 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:51,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:51,323 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:51,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:51,324 INFO L82 PathProgramCache]: Analyzing trace with hash -577377603, now seen corresponding path program 69 times [2021-06-05 06:25:51,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:51,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556724825] [2021-06-05 06:25:51,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:51,582 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:51,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:51,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556724825] [2021-06-05 06:25:51,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556724825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:51,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232196902] [2021-06-05 06:25:51,582 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 [2021-06-05 06:25:51,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:25:51,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:51,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 06:25:51,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:51,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:25:51,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:51,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:51,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:51,790 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:37 [2021-06-05 06:25:51,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:51,852 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:51,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-06-05 06:25:51,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:51,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:51,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:25:51,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:75 [2021-06-05 06:25:51,909 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:51,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:25:51,910 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:25:51,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:51,932 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:51,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:25:51,933 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:25:51,962 INFO L628 ElimStorePlain]: treesize reduction 10, result has 82.1 percent of original size [2021-06-05 06:25:51,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:25:51,964 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:44 [2021-06-05 06:25:52,044 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:52,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232196902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:52,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:52,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:25:52,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901775667] [2021-06-05 06:25:52,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:25:52,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:52,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:25:52,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:25:52,045 INFO L87 Difference]: Start difference. First operand 44205 states and 183145 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:55,917 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-06-05 06:25:57,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:57,002 INFO L93 Difference]: Finished difference Result 105841 states and 429038 transitions. [2021-06-05 06:25:57,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 06:25:57,002 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:25:57,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:57,330 INFO L225 Difference]: With dead ends: 105841 [2021-06-05 06:25:57,330 INFO L226 Difference]: Without dead ends: 105588 [2021-06-05 06:25:57,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2835 ImplicationChecksByTransitivity, 3439.7ms TimeCoverageRelationStatistics Valid=1347, Invalid=7209, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 06:25:57,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105588 states. [2021-06-05 06:25:58,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105588 to 44569. [2021-06-05 06:25:58,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44569 states, 44568 states have (on average 4.14333153832346) internal successors, (184660), 44568 states have internal predecessors, (184660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:58,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44569 states to 44569 states and 184660 transitions. [2021-06-05 06:25:58,753 INFO L78 Accepts]: Start accepts. Automaton has 44569 states and 184660 transitions. Word has length 39 [2021-06-05 06:25:58,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:58,753 INFO L482 AbstractCegarLoop]: Abstraction has 44569 states and 184660 transitions. [2021-06-05 06:25:58,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:58,754 INFO L276 IsEmpty]: Start isEmpty. Operand 44569 states and 184660 transitions. [2021-06-05 06:25:59,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:25:59,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:59,193 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:59,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:59,408 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:59,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:59,409 INFO L82 PathProgramCache]: Analyzing trace with hash 171718673, now seen corresponding path program 70 times [2021-06-05 06:25:59,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:59,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078407079] [2021-06-05 06:25:59,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:59,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:59,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:59,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078407079] [2021-06-05 06:25:59,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078407079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:59,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012914645] [2021-06-05 06:25:59,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:59,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:25:59,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:59,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:25:59,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:59,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:25:59,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:59,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:59,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:59,885 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 06:25:59,934 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:25:59,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:25:59,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:59,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:59,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:59,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:25:59,982 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:59,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012914645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:59,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:59,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-06-05 06:25:59,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548249387] [2021-06-05 06:25:59,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:25:59,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:59,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:25:59,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:25:59,983 INFO L87 Difference]: Start difference. First operand 44569 states and 184660 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:01,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:01,715 INFO L93 Difference]: Finished difference Result 84744 states and 347051 transitions. [2021-06-05 06:26:01,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:26:01,715 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:26:01,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:01,943 INFO L225 Difference]: With dead ends: 84744 [2021-06-05 06:26:01,943 INFO L226 Difference]: Without dead ends: 84670 [2021-06-05 06:26:01,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 867.2ms TimeCoverageRelationStatistics Valid=293, Invalid=1599, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:26:02,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84670 states. [2021-06-05 06:26:02,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84670 to 44139. [2021-06-05 06:26:03,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44139 states, 44138 states have (on average 4.1429833703384835) internal successors, (182863), 44138 states have internal predecessors, (182863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:03,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44139 states to 44139 states and 182863 transitions. [2021-06-05 06:26:03,162 INFO L78 Accepts]: Start accepts. Automaton has 44139 states and 182863 transitions. Word has length 39 [2021-06-05 06:26:03,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:03,162 INFO L482 AbstractCegarLoop]: Abstraction has 44139 states and 182863 transitions. [2021-06-05 06:26:03,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:03,162 INFO L276 IsEmpty]: Start isEmpty. Operand 44139 states and 182863 transitions. [2021-06-05 06:26:03,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:26:03,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:03,235 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:03,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:03,436 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:03,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:03,436 INFO L82 PathProgramCache]: Analyzing trace with hash -388199381, now seen corresponding path program 71 times [2021-06-05 06:26:03,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:03,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450344913] [2021-06-05 06:26:03,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:03,703 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:03,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:03,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450344913] [2021-06-05 06:26:03,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450344913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:03,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711014773] [2021-06-05 06:26:03,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:03,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:26:03,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:03,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 06:26:03,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:03,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:26:03,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:03,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:03,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:26:03,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:41 [2021-06-05 06:26:03,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:03,968 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:03,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-06-05 06:26:03,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:03,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:03,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:03,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:24 [2021-06-05 06:26:04,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:04,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:04,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:04,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:04,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-06-05 06:26:04,065 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:04,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:04,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:04,076 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:33 [2021-06-05 06:26:04,166 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:04,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711014773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:04,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:04,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:26:04,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030812384] [2021-06-05 06:26:04,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:26:04,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:04,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:26:04,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:26:04,167 INFO L87 Difference]: Start difference. First operand 44139 states and 182863 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:08,058 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-06-05 06:26:09,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:09,565 INFO L93 Difference]: Finished difference Result 120260 states and 495913 transitions. [2021-06-05 06:26:09,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 06:26:09,565 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:26:09,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:09,939 INFO L225 Difference]: With dead ends: 120260 [2021-06-05 06:26:09,939 INFO L226 Difference]: Without dead ends: 120069 [2021-06-05 06:26:09,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3105 ImplicationChecksByTransitivity, 3618.4ms TimeCoverageRelationStatistics Valid=1341, Invalid=7971, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 06:26:10,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120069 states. [2021-06-05 06:26:11,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120069 to 44403. [2021-06-05 06:26:11,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44403 states, 44402 states have (on average 4.143281834151614) internal successors, (183970), 44402 states have internal predecessors, (183970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:11,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44403 states to 44403 states and 183970 transitions. [2021-06-05 06:26:11,678 INFO L78 Accepts]: Start accepts. Automaton has 44403 states and 183970 transitions. Word has length 39 [2021-06-05 06:26:11,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:11,678 INFO L482 AbstractCegarLoop]: Abstraction has 44403 states and 183970 transitions. [2021-06-05 06:26:11,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:11,678 INFO L276 IsEmpty]: Start isEmpty. Operand 44403 states and 183970 transitions. [2021-06-05 06:26:11,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:26:11,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:11,755 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:11,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2021-06-05 06:26:11,957 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:11,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:11,957 INFO L82 PathProgramCache]: Analyzing trace with hash 249071557, now seen corresponding path program 72 times [2021-06-05 06:26:11,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:11,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769380296] [2021-06-05 06:26:11,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:11,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:12,220 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:12,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:12,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769380296] [2021-06-05 06:26:12,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769380296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:12,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640128949] [2021-06-05 06:26:12,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:12,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:26:12,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:12,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:26:12,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:12,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:26:12,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:12,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:26:12,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:12,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:12,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:12,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:35 [2021-06-05 06:26:12,609 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:26:12,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 06:26:12,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:12,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:12,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:12,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:18 [2021-06-05 06:26:12,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:12,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:26:12,659 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:12,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:12,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:12,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 06:26:12,708 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:12,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640128949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:12,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:12,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:26:12,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45217115] [2021-06-05 06:26:12,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:26:12,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:12,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:26:12,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:26:12,709 INFO L87 Difference]: Start difference. First operand 44403 states and 183970 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:13,847 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-06-05 06:26:15,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:15,523 INFO L93 Difference]: Finished difference Result 85874 states and 347865 transitions. [2021-06-05 06:26:15,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:26:15,524 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:26:15,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:15,755 INFO L225 Difference]: With dead ends: 85874 [2021-06-05 06:26:15,756 INFO L226 Difference]: Without dead ends: 85722 [2021-06-05 06:26:15,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 1880.3ms TimeCoverageRelationStatistics Valid=687, Invalid=3869, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 06:26:16,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85722 states. [2021-06-05 06:26:16,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85722 to 44645. [2021-06-05 06:26:16,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44645 states, 44644 states have (on average 4.1416315742317) internal successors, (184899), 44644 states have internal predecessors, (184899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:17,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44645 states to 44645 states and 184899 transitions. [2021-06-05 06:26:17,252 INFO L78 Accepts]: Start accepts. Automaton has 44645 states and 184899 transitions. Word has length 39 [2021-06-05 06:26:17,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:17,252 INFO L482 AbstractCegarLoop]: Abstraction has 44645 states and 184899 transitions. [2021-06-05 06:26:17,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:17,253 INFO L276 IsEmpty]: Start isEmpty. Operand 44645 states and 184899 transitions. [2021-06-05 06:26:17,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:26:17,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:17,331 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:17,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:17,531 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:17,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:17,532 INFO L82 PathProgramCache]: Analyzing trace with hash -653921383, now seen corresponding path program 73 times [2021-06-05 06:26:17,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:17,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916099654] [2021-06-05 06:26:17,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:17,830 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:17,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:17,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916099654] [2021-06-05 06:26:17,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916099654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:17,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123314362] [2021-06-05 06:26:17,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:17,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:26:17,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:18,030 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:26:18,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:26:18,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:18,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:18,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:18,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 06:26:18,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:26:18,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:18,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:18,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:18,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:26:18,139 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:18,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123314362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:18,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:18,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:26:18,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190796874] [2021-06-05 06:26:18,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:26:18,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:18,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:26:18,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:26:18,140 INFO L87 Difference]: Start difference. First operand 44645 states and 184899 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:19,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:19,900 INFO L93 Difference]: Finished difference Result 73252 states and 300101 transitions. [2021-06-05 06:26:19,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:26:19,901 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:26:19,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:20,103 INFO L225 Difference]: With dead ends: 73252 [2021-06-05 06:26:20,103 INFO L226 Difference]: Without dead ends: 73060 [2021-06-05 06:26:20,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 938.4ms TimeCoverageRelationStatistics Valid=320, Invalid=1486, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:26:20,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73060 states. [2021-06-05 06:26:21,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73060 to 44697. [2021-06-05 06:26:21,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44697 states, 44696 states have (on average 4.140885090388402) internal successors, (185081), 44696 states have internal predecessors, (185081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:21,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44697 states to 44697 states and 185081 transitions. [2021-06-05 06:26:21,280 INFO L78 Accepts]: Start accepts. Automaton has 44697 states and 185081 transitions. Word has length 39 [2021-06-05 06:26:21,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:21,280 INFO L482 AbstractCegarLoop]: Abstraction has 44697 states and 185081 transitions. [2021-06-05 06:26:21,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:21,280 INFO L276 IsEmpty]: Start isEmpty. Operand 44697 states and 185081 transitions. [2021-06-05 06:26:21,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:26:21,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:21,359 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:21,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 06:26:21,559 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:21,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:21,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1495860655, now seen corresponding path program 74 times [2021-06-05 06:26:21,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:21,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767534004] [2021-06-05 06:26:21,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:21,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:21,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767534004] [2021-06-05 06:26:21,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767534004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:21,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185247473] [2021-06-05 06:26:21,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:21,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:26:21,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:21,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:26:21,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:22,136 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:26:22,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:26:22,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:22,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:22,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:22,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-06-05 06:26:22,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:26:22,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:22,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:22,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:22,177 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:26:22,213 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:22,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185247473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:22,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:22,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:26:22,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004609835] [2021-06-05 06:26:22,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:26:22,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:22,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:26:22,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:26:22,214 INFO L87 Difference]: Start difference. First operand 44697 states and 185081 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:22,977 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-06-05 06:26:24,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:24,030 INFO L93 Difference]: Finished difference Result 74429 states and 304617 transitions. [2021-06-05 06:26:24,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:26:24,030 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:26:24,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:24,235 INFO L225 Difference]: With dead ends: 74429 [2021-06-05 06:26:24,236 INFO L226 Difference]: Without dead ends: 74181 [2021-06-05 06:26:24,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1243.4ms TimeCoverageRelationStatistics Valid=353, Invalid=1539, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:26:24,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74181 states. [2021-06-05 06:26:25,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74181 to 44883. [2021-06-05 06:26:25,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44883 states, 44882 states have (on average 4.139320885878526) internal successors, (185781), 44882 states have internal predecessors, (185781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:25,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44883 states to 44883 states and 185781 transitions. [2021-06-05 06:26:25,447 INFO L78 Accepts]: Start accepts. Automaton has 44883 states and 185781 transitions. Word has length 39 [2021-06-05 06:26:25,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:25,447 INFO L482 AbstractCegarLoop]: Abstraction has 44883 states and 185781 transitions. [2021-06-05 06:26:25,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:25,447 INFO L276 IsEmpty]: Start isEmpty. Operand 44883 states and 185781 transitions. [2021-06-05 06:26:25,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:26:25,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:25,523 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:25,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-05 06:26:25,724 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:25,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:25,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1172159941, now seen corresponding path program 75 times [2021-06-05 06:26:25,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:25,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910330330] [2021-06-05 06:26:25,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:25,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:26,011 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:26,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:26,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910330330] [2021-06-05 06:26:26,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910330330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:26,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156100701] [2021-06-05 06:26:26,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:26,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:26:26,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:26,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 06:26:26,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:26,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:26,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:26,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 06:26:26,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:26,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:26,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:26:26,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:78 [2021-06-05 06:26:26,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:26,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:26,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 54 [2021-06-05 06:26:26,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:26,710 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 06:26:26,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:26:26,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:26,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:26,725 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:26,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 45 [2021-06-05 06:26:26,726 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:26,733 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 06:26:26,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-06-05 06:26:26,734 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:26,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:26,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 06:26:26,795 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:231, output treesize:206 [2021-06-05 06:26:26,975 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:26,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:26:26,976 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:26,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:26,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:26,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:40 [2021-06-05 06:26:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:27,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156100701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:27,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:27,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 06:26:27,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125571676] [2021-06-05 06:26:27,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 06:26:27,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:27,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 06:26:27,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:26:27,072 INFO L87 Difference]: Start difference. First operand 44883 states and 185781 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:27,580 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 52 [2021-06-05 06:26:28,967 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-06-05 06:26:31,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:31,208 INFO L93 Difference]: Finished difference Result 91301 states and 369112 transitions. [2021-06-05 06:26:31,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:26:31,212 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:26:31,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:31,598 INFO L225 Difference]: With dead ends: 91301 [2021-06-05 06:26:31,598 INFO L226 Difference]: Without dead ends: 90975 [2021-06-05 06:26:31,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 3595.4ms TimeCoverageRelationStatistics Valid=1220, Invalid=4480, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 06:26:31,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90975 states. [2021-06-05 06:26:32,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90975 to 44829. [2021-06-05 06:26:32,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44829 states, 44828 states have (on average 4.139756402248595) internal successors, (185577), 44828 states have internal predecessors, (185577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:32,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44829 states to 44829 states and 185577 transitions. [2021-06-05 06:26:32,921 INFO L78 Accepts]: Start accepts. Automaton has 44829 states and 185577 transitions. Word has length 39 [2021-06-05 06:26:32,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:32,921 INFO L482 AbstractCegarLoop]: Abstraction has 44829 states and 185577 transitions. [2021-06-05 06:26:32,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:32,921 INFO L276 IsEmpty]: Start isEmpty. Operand 44829 states and 185577 transitions. [2021-06-05 06:26:32,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:26:32,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:32,999 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:33,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-05 06:26:33,199 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:33,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:33,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1376080687, now seen corresponding path program 76 times [2021-06-05 06:26:33,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:33,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617668088] [2021-06-05 06:26:33,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:33,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:33,491 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:33,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:33,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617668088] [2021-06-05 06:26:33,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617668088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:33,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466545575] [2021-06-05 06:26:33,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:33,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:26:33,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:33,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:26:33,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:33,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:26:33,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:33,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:33,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:33,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 06:26:33,751 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:26:33,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:26:33,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:33,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:33,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:33,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:26:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:33,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466545575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:33,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:33,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:26:33,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849161424] [2021-06-05 06:26:33,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:26:33,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:33,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:26:33,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:26:33,796 INFO L87 Difference]: Start difference. First operand 44829 states and 185577 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:35,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:35,374 INFO L93 Difference]: Finished difference Result 78132 states and 319558 transitions. [2021-06-05 06:26:35,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:26:35,374 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:26:35,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:35,596 INFO L225 Difference]: With dead ends: 78132 [2021-06-05 06:26:35,597 INFO L226 Difference]: Without dead ends: 78042 [2021-06-05 06:26:35,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 879.1ms TimeCoverageRelationStatistics Valid=333, Invalid=1307, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:26:35,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78042 states. [2021-06-05 06:26:36,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78042 to 44945. [2021-06-05 06:26:36,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44945 states, 44944 states have (on average 4.140107689569242) internal successors, (186073), 44944 states have internal predecessors, (186073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:36,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44945 states to 44945 states and 186073 transitions. [2021-06-05 06:26:36,833 INFO L78 Accepts]: Start accepts. Automaton has 44945 states and 186073 transitions. Word has length 39 [2021-06-05 06:26:36,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:36,833 INFO L482 AbstractCegarLoop]: Abstraction has 44945 states and 186073 transitions. [2021-06-05 06:26:36,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:36,833 INFO L276 IsEmpty]: Start isEmpty. Operand 44945 states and 186073 transitions. [2021-06-05 06:26:36,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:26:36,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:36,911 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:37,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:37,111 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:37,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:37,111 INFO L82 PathProgramCache]: Analyzing trace with hash -755570769, now seen corresponding path program 77 times [2021-06-05 06:26:37,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:37,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784486296] [2021-06-05 06:26:37,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:37,404 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:37,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:37,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784486296] [2021-06-05 06:26:37,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784486296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:37,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309597777] [2021-06-05 06:26:37,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:26:37,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:26:37,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:37,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 06:26:37,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:37,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:26:37,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:37,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:37,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:26:37,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:48 [2021-06-05 06:26:37,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:37,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:37,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:37,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:37,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 59 [2021-06-05 06:26:37,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:26:37,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:37,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:26:37,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:37 [2021-06-05 06:26:37,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:37,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:37,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:37,819 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:37,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-06-05 06:26:37,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:26:37,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:37,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:37,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 06:26:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:37,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309597777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:37,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:37,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:26:37,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852035553] [2021-06-05 06:26:37,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:26:37,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:37,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:26:37,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:26:37,874 INFO L87 Difference]: Start difference. First operand 44945 states and 186073 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:38,374 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-06-05 06:26:42,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:42,422 INFO L93 Difference]: Finished difference Result 122576 states and 498488 transitions. [2021-06-05 06:26:42,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 06:26:42,422 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:26:42,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:42,803 INFO L225 Difference]: With dead ends: 122576 [2021-06-05 06:26:42,803 INFO L226 Difference]: Without dead ends: 122282 [2021-06-05 06:26:42,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1674 ImplicationChecksByTransitivity, 2953.7ms TimeCoverageRelationStatistics Valid=1048, Invalid=5272, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 06:26:42,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122282 states. [2021-06-05 06:26:44,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122282 to 44673. [2021-06-05 06:26:44,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44673 states, 44672 states have (on average 4.141229405444126) internal successors, (184997), 44672 states have internal predecessors, (184997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:44,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44673 states to 44673 states and 184997 transitions. [2021-06-05 06:26:44,754 INFO L78 Accepts]: Start accepts. Automaton has 44673 states and 184997 transitions. Word has length 39 [2021-06-05 06:26:44,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:44,754 INFO L482 AbstractCegarLoop]: Abstraction has 44673 states and 184997 transitions. [2021-06-05 06:26:44,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:44,754 INFO L276 IsEmpty]: Start isEmpty. Operand 44673 states and 184997 transitions. [2021-06-05 06:26:44,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:26:44,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:44,845 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:45,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:45,045 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:45,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:45,045 INFO L82 PathProgramCache]: Analyzing trace with hash 575171183, now seen corresponding path program 78 times [2021-06-05 06:26:45,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:45,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752337280] [2021-06-05 06:26:45,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:45,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:45,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752337280] [2021-06-05 06:26:45,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752337280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:45,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966296283] [2021-06-05 06:26:45,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:45,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:26:45,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:45,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 06:26:45,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:45,649 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:26:45,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 06:26:45,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:45,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:45,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:26:45,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:33 [2021-06-05 06:26:45,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 06:26:45,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:45,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:45,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:26:45,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:18 [2021-06-05 06:26:45,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:45,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-06-05 06:26:45,753 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:45,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:45,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:45,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:13 [2021-06-05 06:26:45,808 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:45,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966296283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:45,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:45,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 06:26:45,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963264677] [2021-06-05 06:26:45,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:26:45,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:45,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:26:45,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:26:45,809 INFO L87 Difference]: Start difference. First operand 44673 states and 184997 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:48,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:48,437 INFO L93 Difference]: Finished difference Result 86070 states and 352832 transitions. [2021-06-05 06:26:48,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 06:26:48,437 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:26:48,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:48,685 INFO L225 Difference]: With dead ends: 86070 [2021-06-05 06:26:48,685 INFO L226 Difference]: Without dead ends: 85819 [2021-06-05 06:26:48,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1423.2ms TimeCoverageRelationStatistics Valid=471, Invalid=2285, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:26:48,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85819 states. [2021-06-05 06:26:49,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85819 to 45003. [2021-06-05 06:26:50,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45003 states, 45002 states have (on average 4.138416070396871) internal successors, (186237), 45002 states have internal predecessors, (186237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:50,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45003 states to 45003 states and 186237 transitions. [2021-06-05 06:26:50,153 INFO L78 Accepts]: Start accepts. Automaton has 45003 states and 186237 transitions. Word has length 39 [2021-06-05 06:26:50,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:50,153 INFO L482 AbstractCegarLoop]: Abstraction has 45003 states and 186237 transitions. [2021-06-05 06:26:50,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:50,153 INFO L276 IsEmpty]: Start isEmpty. Operand 45003 states and 186237 transitions. [2021-06-05 06:26:50,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:26:50,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:50,230 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:50,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:50,433 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:50,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:50,434 INFO L82 PathProgramCache]: Analyzing trace with hash 251470469, now seen corresponding path program 79 times [2021-06-05 06:26:50,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:50,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622653278] [2021-06-05 06:26:50,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:50,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:50,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622653278] [2021-06-05 06:26:50,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622653278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:50,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290248464] [2021-06-05 06:26:50,752 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 [2021-06-05 06:26:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:50,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:26:50,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:51,193 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-06-05 06:26:51,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:26:51,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:51,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:51,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:51,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 06:26:51,262 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:26:51,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:26:51,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:51,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:51,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:51,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:26:51,302 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:51,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290248464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:51,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:51,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:26:51,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561165081] [2021-06-05 06:26:51,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:26:51,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:51,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:26:51,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:26:51,303 INFO L87 Difference]: Start difference. First operand 45003 states and 186237 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:53,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:53,462 INFO L93 Difference]: Finished difference Result 92192 states and 375657 transitions. [2021-06-05 06:26:53,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:26:53,462 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:26:53,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:53,711 INFO L225 Difference]: With dead ends: 92192 [2021-06-05 06:26:53,711 INFO L226 Difference]: Without dead ends: 92040 [2021-06-05 06:26:53,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1332.6ms TimeCoverageRelationStatistics Valid=411, Invalid=2039, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:26:53,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92040 states. [2021-06-05 06:26:54,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92040 to 45083. [2021-06-05 06:26:54,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45083 states, 45082 states have (on average 4.138791535424338) internal successors, (186585), 45082 states have internal predecessors, (186585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:54,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45083 states to 45083 states and 186585 transitions. [2021-06-05 06:26:54,992 INFO L78 Accepts]: Start accepts. Automaton has 45083 states and 186585 transitions. Word has length 39 [2021-06-05 06:26:54,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:54,992 INFO L482 AbstractCegarLoop]: Abstraction has 45083 states and 186585 transitions. [2021-06-05 06:26:54,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:54,992 INFO L276 IsEmpty]: Start isEmpty. Operand 45083 states and 186585 transitions. [2021-06-05 06:26:55,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:26:55,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:55,070 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:55,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:55,271 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:55,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:55,271 INFO L82 PathProgramCache]: Analyzing trace with hash 455391215, now seen corresponding path program 80 times [2021-06-05 06:26:55,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:55,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343122428] [2021-06-05 06:26:55,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:55,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:55,565 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:55,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:55,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343122428] [2021-06-05 06:26:55,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343122428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:55,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546299812] [2021-06-05 06:26:55,565 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 [2021-06-05 06:26:55,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:26:55,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:55,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:26:55,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:55,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:26:55,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:55,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:55,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:55,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 06:26:55,811 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:26:55,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:26:55,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:55,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:55,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:55,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:26:55,851 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:55,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546299812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:55,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:55,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:26:55,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103157964] [2021-06-05 06:26:55,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:26:55,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:55,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:26:55,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:26:55,851 INFO L87 Difference]: Start difference. First operand 45083 states and 186585 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:57,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:57,437 INFO L93 Difference]: Finished difference Result 79399 states and 324786 transitions. [2021-06-05 06:26:57,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:26:57,437 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:26:57,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:57,658 INFO L225 Difference]: With dead ends: 79399 [2021-06-05 06:26:57,658 INFO L226 Difference]: Without dead ends: 79293 [2021-06-05 06:26:57,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 902.5ms TimeCoverageRelationStatistics Valid=351, Invalid=1455, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:26:57,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79293 states. [2021-06-05 06:26:58,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79293 to 44925. [2021-06-05 06:26:58,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44925 states, 44924 states have (on average 4.139324191968658) internal successors, (185955), 44924 states have internal predecessors, (185955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:58,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44925 states to 44925 states and 185955 transitions. [2021-06-05 06:26:58,914 INFO L78 Accepts]: Start accepts. Automaton has 44925 states and 185955 transitions. Word has length 39 [2021-06-05 06:26:58,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:58,914 INFO L482 AbstractCegarLoop]: Abstraction has 44925 states and 185955 transitions. [2021-06-05 06:26:58,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:58,914 INFO L276 IsEmpty]: Start isEmpty. Operand 44925 states and 185955 transitions. [2021-06-05 06:26:58,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:26:58,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:58,991 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:59,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:59,191 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:59,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:59,191 INFO L82 PathProgramCache]: Analyzing trace with hash -175003259, now seen corresponding path program 81 times [2021-06-05 06:26:59,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:59,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38330802] [2021-06-05 06:26:59,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:59,475 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:59,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:59,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38330802] [2021-06-05 06:26:59,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38330802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:59,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302985062] [2021-06-05 06:26:59,475 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 [2021-06-05 06:26:59,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:26:59,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:59,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:26:59,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:59,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:26:59,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:59,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:59,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:26:59,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:33 [2021-06-05 06:26:59,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:59,773 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:59,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 45 [2021-06-05 06:26:59,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:59,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:59,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 06:26:59,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:71 [2021-06-05 06:26:59,846 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:59,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:26:59,847 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:59,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:59,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:59,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 06:26:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:59,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302985062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:59,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:59,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:26:59,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511385219] [2021-06-05 06:26:59,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:26:59,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:59,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:26:59,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:26:59,894 INFO L87 Difference]: Start difference. First operand 44925 states and 185955 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:00,195 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-06-05 06:27:03,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:03,407 INFO L93 Difference]: Finished difference Result 91158 states and 369384 transitions. [2021-06-05 06:27:03,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 06:27:03,407 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:27:03,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:03,662 INFO L225 Difference]: With dead ends: 91158 [2021-06-05 06:27:03,662 INFO L226 Difference]: Without dead ends: 90767 [2021-06-05 06:27:03,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 2618.2ms TimeCoverageRelationStatistics Valid=827, Invalid=4723, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 06:27:03,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90767 states. [2021-06-05 06:27:04,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90767 to 45055. [2021-06-05 06:27:04,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45055 states, 45054 states have (on average 4.138922182270164) internal successors, (186475), 45054 states have internal predecessors, (186475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:04,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45055 states to 45055 states and 186475 transitions. [2021-06-05 06:27:04,920 INFO L78 Accepts]: Start accepts. Automaton has 45055 states and 186475 transitions. Word has length 39 [2021-06-05 06:27:04,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:04,920 INFO L482 AbstractCegarLoop]: Abstraction has 45055 states and 186475 transitions. [2021-06-05 06:27:04,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:04,920 INFO L276 IsEmpty]: Start isEmpty. Operand 45055 states and 186475 transitions. [2021-06-05 06:27:04,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:27:04,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:04,997 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:05,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-05 06:27:05,197 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:05,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:05,197 INFO L82 PathProgramCache]: Analyzing trace with hash -448909371, now seen corresponding path program 82 times [2021-06-05 06:27:05,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:05,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607169089] [2021-06-05 06:27:05,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:05,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:05,469 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:05,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:05,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607169089] [2021-06-05 06:27:05,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607169089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:05,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932582648] [2021-06-05 06:27:05,469 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 [2021-06-05 06:27:05,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:27:05,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:05,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:27:05,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:05,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:27:05,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:05,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:05,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:05,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 06:27:05,713 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:27:05,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:27:05,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:05,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:05,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:05,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:27:05,751 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:05,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932582648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:05,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:05,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:27:05,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746101152] [2021-06-05 06:27:05,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:27:05,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:05,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:27:05,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:27:05,752 INFO L87 Difference]: Start difference. First operand 45055 states and 186475 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:06,376 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-06-05 06:27:07,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:07,495 INFO L93 Difference]: Finished difference Result 99677 states and 406647 transitions. [2021-06-05 06:27:07,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:27:07,495 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:27:07,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:07,800 INFO L225 Difference]: With dead ends: 99677 [2021-06-05 06:27:07,800 INFO L226 Difference]: Without dead ends: 99595 [2021-06-05 06:27:07,800 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1158.1ms TimeCoverageRelationStatistics Valid=379, Invalid=1783, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:27:07,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99595 states. [2021-06-05 06:27:09,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99595 to 45321. [2021-06-05 06:27:09,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45321 states, 45320 states have (on average 4.138857016769638) internal successors, (187573), 45320 states have internal predecessors, (187573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:09,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45321 states to 45321 states and 187573 transitions. [2021-06-05 06:27:09,546 INFO L78 Accepts]: Start accepts. Automaton has 45321 states and 187573 transitions. Word has length 39 [2021-06-05 06:27:09,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:09,546 INFO L482 AbstractCegarLoop]: Abstraction has 45321 states and 187573 transitions. [2021-06-05 06:27:09,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:09,546 INFO L276 IsEmpty]: Start isEmpty. Operand 45321 states and 187573 transitions. [2021-06-05 06:27:09,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:27:09,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:09,637 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:09,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:09,837 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:09,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:09,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1568844437, now seen corresponding path program 83 times [2021-06-05 06:27:09,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:09,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207403366] [2021-06-05 06:27:09,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:10,136 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:10,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:10,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207403366] [2021-06-05 06:27:10,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207403366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:10,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813935306] [2021-06-05 06:27:10,137 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 [2021-06-05 06:27:10,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:27:10,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:10,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 06:27:10,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:10,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:10,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 49 [2021-06-05 06:27:10,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:10,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:10,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:10,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:96 [2021-06-05 06:27:10,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:10,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:10,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:10,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:10,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2021-06-05 06:27:10,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:27:10,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:10,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:10,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:10,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 06:27:10,610 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:10,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:10,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:10,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:10,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:10,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2021-06-05 06:27:10,615 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:10,674 INFO L628 ElimStorePlain]: treesize reduction 49, result has 67.5 percent of original size [2021-06-05 06:27:10,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:27:10,677 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:166, output treesize:90 [2021-06-05 06:27:10,748 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_102], 6=[q2]} [2021-06-05 06:27:10,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:10,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:10,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 32 [2021-06-05 06:27:10,762 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:10,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:10,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:10,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:10,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:10,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:10,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-06-05 06:27:10,806 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:27:10,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:10,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:27:10,839 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:110, output treesize:77 [2021-06-05 06:27:10,956 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:10,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813935306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:10,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:10,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:27:10,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254908908] [2021-06-05 06:27:10,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:27:10,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:10,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:27:10,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:27:10,957 INFO L87 Difference]: Start difference. First operand 45321 states and 187573 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:12,143 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2021-06-05 06:27:19,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:19,078 INFO L93 Difference]: Finished difference Result 112080 states and 452898 transitions. [2021-06-05 06:27:19,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 06:27:19,079 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:27:19,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:19,419 INFO L225 Difference]: With dead ends: 112080 [2021-06-05 06:27:19,419 INFO L226 Difference]: Without dead ends: 111755 [2021-06-05 06:27:19,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4998 ImplicationChecksByTransitivity, 6414.7ms TimeCoverageRelationStatistics Valid=2280, Invalid=12482, Unknown=0, NotChecked=0, Total=14762 [2021-06-05 06:27:19,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111755 states. [2021-06-05 06:27:20,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111755 to 45455. [2021-06-05 06:27:20,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45455 states, 45454 states have (on average 4.137787653451841) internal successors, (188079), 45454 states have internal predecessors, (188079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:20,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45455 states to 45455 states and 188079 transitions. [2021-06-05 06:27:20,926 INFO L78 Accepts]: Start accepts. Automaton has 45455 states and 188079 transitions. Word has length 39 [2021-06-05 06:27:20,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:20,926 INFO L482 AbstractCegarLoop]: Abstraction has 45455 states and 188079 transitions. [2021-06-05 06:27:20,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:20,926 INFO L276 IsEmpty]: Start isEmpty. Operand 45455 states and 188079 transitions. [2021-06-05 06:27:21,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:27:21,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:21,003 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:21,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-06-05 06:27:21,203 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:21,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:21,203 INFO L82 PathProgramCache]: Analyzing trace with hash -259731149, now seen corresponding path program 84 times [2021-06-05 06:27:21,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:21,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474842720] [2021-06-05 06:27:21,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:21,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:21,479 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:21,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:21,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474842720] [2021-06-05 06:27:21,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474842720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:21,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040968306] [2021-06-05 06:27:21,480 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 [2021-06-05 06:27:21,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:27:21,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:21,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 06:27:21,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:22,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:22,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 06:27:22,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:22,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:22,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:27:22,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:64, output treesize:67 [2021-06-05 06:27:22,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:22,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:22,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 41 [2021-06-05 06:27:22,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:22,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:22,247 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:22,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 06:27:22,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:22,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:22,263 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:22,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 38 [2021-06-05 06:27:22,264 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:22,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:22,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-06-05 06:27:22,272 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 06:27:22,376 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-06-05 06:27:22,377 INFO L628 ElimStorePlain]: treesize reduction 67, result has 72.5 percent of original size [2021-06-05 06:27:22,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:27:22,395 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:242, output treesize:148 [2021-06-05 06:27:22,539 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:22,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:27:22,540 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:27:22,613 INFO L628 ElimStorePlain]: treesize reduction 21, result has 83.2 percent of original size [2021-06-05 06:27:22,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:22,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:27:22,621 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:27:22,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:22,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:27:22,662 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:126, output treesize:112 [2021-06-05 06:27:22,849 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:22,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040968306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:22,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:22,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 06:27:22,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683891435] [2021-06-05 06:27:22,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 06:27:22,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:22,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 06:27:22,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:27:22,850 INFO L87 Difference]: Start difference. First operand 45455 states and 188079 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:23,159 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-06-05 06:27:23,946 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-06-05 06:27:24,138 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 39 [2021-06-05 06:27:26,252 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-06-05 06:27:27,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:27,320 INFO L93 Difference]: Finished difference Result 82223 states and 333418 transitions. [2021-06-05 06:27:27,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 06:27:27,320 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:27:27,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:27,540 INFO L225 Difference]: With dead ends: 82223 [2021-06-05 06:27:27,540 INFO L226 Difference]: Without dead ends: 82051 [2021-06-05 06:27:27,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 3837.5ms TimeCoverageRelationStatistics Valid=1204, Invalid=4958, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 06:27:27,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82051 states. [2021-06-05 06:27:28,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82051 to 45489. [2021-06-05 06:27:28,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45489 states, 45488 states have (on average 4.137464825888146) internal successors, (188205), 45488 states have internal predecessors, (188205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:28,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45489 states to 45489 states and 188205 transitions. [2021-06-05 06:27:28,743 INFO L78 Accepts]: Start accepts. Automaton has 45489 states and 188205 transitions. Word has length 39 [2021-06-05 06:27:28,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:28,743 INFO L482 AbstractCegarLoop]: Abstraction has 45489 states and 188205 transitions. [2021-06-05 06:27:28,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:28,744 INFO L276 IsEmpty]: Start isEmpty. Operand 45489 states and 188205 transitions. [2021-06-05 06:27:28,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:27:28,821 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:28,821 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:29,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:29,022 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:29,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:29,022 INFO L82 PathProgramCache]: Analyzing trace with hash -737558007, now seen corresponding path program 85 times [2021-06-05 06:27:29,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:29,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577729729] [2021-06-05 06:27:29,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:29,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:29,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577729729] [2021-06-05 06:27:29,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577729729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:29,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541472608] [2021-06-05 06:27:29,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:29,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:29,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:27:29,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:29,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:27:29,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:29,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:29,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:29,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 06:27:29,511 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:27:29,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 06:27:29,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:29,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:29,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:29,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:15 [2021-06-05 06:27:29,566 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:29,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541472608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:29,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:29,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:27:29,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364876301] [2021-06-05 06:27:29,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:27:29,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:29,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:27:29,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:27:29,567 INFO L87 Difference]: Start difference. First operand 45489 states and 188205 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:31,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:31,308 INFO L93 Difference]: Finished difference Result 98850 states and 402996 transitions. [2021-06-05 06:27:31,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:27:31,309 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:27:31,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:31,601 INFO L225 Difference]: With dead ends: 98850 [2021-06-05 06:27:31,601 INFO L226 Difference]: Without dead ends: 98768 [2021-06-05 06:27:31,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1103.7ms TimeCoverageRelationStatistics Valid=356, Invalid=1714, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:27:31,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98768 states. [2021-06-05 06:27:32,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98768 to 45517. [2021-06-05 06:27:32,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45517 states, 45516 states have (on average 4.138566657878548) internal successors, (188371), 45516 states have internal predecessors, (188371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:33,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45517 states to 45517 states and 188371 transitions. [2021-06-05 06:27:33,062 INFO L78 Accepts]: Start accepts. Automaton has 45517 states and 188371 transitions. Word has length 39 [2021-06-05 06:27:33,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:33,062 INFO L482 AbstractCegarLoop]: Abstraction has 45517 states and 188371 transitions. [2021-06-05 06:27:33,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:33,062 INFO L276 IsEmpty]: Start isEmpty. Operand 45517 states and 188371 transitions. [2021-06-05 06:27:33,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:27:33,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:33,139 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:33,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:33,339 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:33,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:33,340 INFO L82 PathProgramCache]: Analyzing trace with hash -707566413, now seen corresponding path program 86 times [2021-06-05 06:27:33,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:33,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348068730] [2021-06-05 06:27:33,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:33,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:33,951 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:33,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:33,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348068730] [2021-06-05 06:27:33,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348068730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:33,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88169193] [2021-06-05 06:27:33,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:33,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:27:33,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:33,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:27:33,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:34,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:27:34,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:34,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:34,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:34,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 06:27:34,197 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:27:34,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:27:34,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:34,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:34,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:34,199 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:27:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:34,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88169193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:34,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:34,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:27:34,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607446258] [2021-06-05 06:27:34,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:27:34,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:34,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:27:34,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:27:34,236 INFO L87 Difference]: Start difference. First operand 45517 states and 188371 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:36,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:36,672 INFO L93 Difference]: Finished difference Result 120384 states and 489351 transitions. [2021-06-05 06:27:36,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:27:36,673 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:27:36,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:37,047 INFO L225 Difference]: With dead ends: 120384 [2021-06-05 06:27:37,047 INFO L226 Difference]: Without dead ends: 120264 [2021-06-05 06:27:37,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1214.1ms TimeCoverageRelationStatistics Valid=462, Invalid=2294, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:27:37,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120264 states. [2021-06-05 06:27:38,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120264 to 44931. [2021-06-05 06:27:38,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44931 states, 44930 states have (on average 4.142198976185177) internal successors, (186109), 44930 states have internal predecessors, (186109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:38,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44931 states to 44931 states and 186109 transitions. [2021-06-05 06:27:38,685 INFO L78 Accepts]: Start accepts. Automaton has 44931 states and 186109 transitions. Word has length 39 [2021-06-05 06:27:38,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:38,685 INFO L482 AbstractCegarLoop]: Abstraction has 44931 states and 186109 transitions. [2021-06-05 06:27:38,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:38,685 INFO L276 IsEmpty]: Start isEmpty. Operand 44931 states and 186109 transitions. [2021-06-05 06:27:38,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:27:38,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:38,764 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:38,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:38,964 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:38,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:38,964 INFO L82 PathProgramCache]: Analyzing trace with hash 411273525, now seen corresponding path program 87 times [2021-06-05 06:27:38,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:38,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182179049] [2021-06-05 06:27:38,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:39,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:39,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182179049] [2021-06-05 06:27:39,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182179049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:39,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906873293] [2021-06-05 06:27:39,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:39,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:27:39,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:39,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 06:27:39,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:39,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:39,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:39,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-06-05 06:27:39,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:39,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:39,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:39,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:78 [2021-06-05 06:27:39,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 06:27:39,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:39,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:39,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:39,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:20 [2021-06-05 06:27:39,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:39,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:27:39,865 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:27:39,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:39,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:27:39,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 06:27:39,906 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:39,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906873293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:39,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:39,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:27:39,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951301205] [2021-06-05 06:27:39,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:27:39,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:39,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:27:39,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:27:39,907 INFO L87 Difference]: Start difference. First operand 44931 states and 186109 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:41,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:41,968 INFO L93 Difference]: Finished difference Result 79310 states and 324525 transitions. [2021-06-05 06:27:41,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:27:41,969 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:27:41,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:42,191 INFO L225 Difference]: With dead ends: 79310 [2021-06-05 06:27:42,191 INFO L226 Difference]: Without dead ends: 79255 [2021-06-05 06:27:42,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 1439.0ms TimeCoverageRelationStatistics Valid=370, Invalid=2600, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:27:42,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79255 states. [2021-06-05 06:27:43,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79255 to 45439. [2021-06-05 06:27:43,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45439 states, 45438 states have (on average 4.136757779831859) internal successors, (187966), 45438 states have internal predecessors, (187966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:43,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45439 states to 45439 states and 187966 transitions. [2021-06-05 06:27:43,419 INFO L78 Accepts]: Start accepts. Automaton has 45439 states and 187966 transitions. Word has length 39 [2021-06-05 06:27:43,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:43,419 INFO L482 AbstractCegarLoop]: Abstraction has 45439 states and 187966 transitions. [2021-06-05 06:27:43,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:43,419 INFO L276 IsEmpty]: Start isEmpty. Operand 45439 states and 187966 transitions. [2021-06-05 06:27:43,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:27:43,500 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:43,500 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:43,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-06-05 06:27:43,700 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:43,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:43,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1949174297, now seen corresponding path program 88 times [2021-06-05 06:27:43,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:43,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218523109] [2021-06-05 06:27:43,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:43,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:43,961 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:43,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:43,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218523109] [2021-06-05 06:27:43,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218523109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:43,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289057841] [2021-06-05 06:27:43,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:43,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:27:43,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:43,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:27:43,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:44,100 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:27:44,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:27:44,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:44,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:44,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:44,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-06-05 06:27:44,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:27:44,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:44,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:44,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:44,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:27:44,243 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:44,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289057841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:44,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:44,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:27:44,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332124872] [2021-06-05 06:27:44,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:27:44,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:44,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:27:44,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:27:44,244 INFO L87 Difference]: Start difference. First operand 45439 states and 187966 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:46,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:46,149 INFO L93 Difference]: Finished difference Result 75424 states and 308637 transitions. [2021-06-05 06:27:46,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:27:46,149 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:27:46,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:46,361 INFO L225 Difference]: With dead ends: 75424 [2021-06-05 06:27:46,362 INFO L226 Difference]: Without dead ends: 75208 [2021-06-05 06:27:46,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1240.6ms TimeCoverageRelationStatistics Valid=377, Invalid=1785, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:27:46,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75208 states. [2021-06-05 06:27:47,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75208 to 45395. [2021-06-05 06:27:47,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45395 states, 45394 states have (on average 4.1372868661056525) internal successors, (187808), 45394 states have internal predecessors, (187808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:47,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45395 states to 45395 states and 187808 transitions. [2021-06-05 06:27:47,582 INFO L78 Accepts]: Start accepts. Automaton has 45395 states and 187808 transitions. Word has length 39 [2021-06-05 06:27:47,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:47,582 INFO L482 AbstractCegarLoop]: Abstraction has 45395 states and 187808 transitions. [2021-06-05 06:27:47,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:47,583 INFO L276 IsEmpty]: Start isEmpty. Operand 45395 states and 187808 transitions. [2021-06-05 06:27:47,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:27:47,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:47,660 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:47,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-06-05 06:27:47,860 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:47,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:47,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1346065441, now seen corresponding path program 89 times [2021-06-05 06:27:47,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:47,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714474262] [2021-06-05 06:27:47,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:48,125 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:48,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:48,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714474262] [2021-06-05 06:27:48,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714474262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:48,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635697575] [2021-06-05 06:27:48,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:27:48,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:27:48,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:48,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 06:27:48,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:48,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:48,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:48,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:48,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:48,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-06-05 06:27:48,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:27:48,294 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-06-05 06:27:48,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:48,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:29 [2021-06-05 06:27:48,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:27:48,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:48,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:48,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:48,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:22 [2021-06-05 06:27:48,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:48,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:48,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:48,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:48,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-06-05 06:27:48,480 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:27:48,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:48,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:27:48,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:19 [2021-06-05 06:27:48,765 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:48,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635697575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:48,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:48,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:27:48,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189140227] [2021-06-05 06:27:48,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:27:48,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:48,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:27:48,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:27:48,766 INFO L87 Difference]: Start difference. First operand 45395 states and 187808 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:51,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:51,757 INFO L93 Difference]: Finished difference Result 73842 states and 301348 transitions. [2021-06-05 06:27:51,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 06:27:51,758 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:27:51,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:51,958 INFO L225 Difference]: With dead ends: 73842 [2021-06-05 06:27:51,959 INFO L226 Difference]: Without dead ends: 73621 [2021-06-05 06:27:51,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 2208.6ms TimeCoverageRelationStatistics Valid=693, Invalid=3999, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 06:27:52,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73621 states. [2021-06-05 06:27:52,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73621 to 45563. [2021-06-05 06:27:53,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45563 states, 45562 states have (on average 4.135134541942847) internal successors, (188405), 45562 states have internal predecessors, (188405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:53,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45563 states to 45563 states and 188405 transitions. [2021-06-05 06:27:53,137 INFO L78 Accepts]: Start accepts. Automaton has 45563 states and 188405 transitions. Word has length 39 [2021-06-05 06:27:53,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:53,137 INFO L482 AbstractCegarLoop]: Abstraction has 45563 states and 188405 transitions. [2021-06-05 06:27:53,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:53,137 INFO L276 IsEmpty]: Start isEmpty. Operand 45563 states and 188405 transitions. [2021-06-05 06:27:53,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:27:53,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:53,216 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:53,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 06:27:53,416 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:53,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:53,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1740520847, now seen corresponding path program 90 times [2021-06-05 06:27:53,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:53,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011759763] [2021-06-05 06:27:53,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:53,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:53,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011759763] [2021-06-05 06:27:53,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011759763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:53,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534883207] [2021-06-05 06:27:53,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:53,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:27:53,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:53,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 06:27:53,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:53,796 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:53,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2021-06-05 06:27:53,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:53,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:53,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:53,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:32 [2021-06-05 06:27:53,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 06:27:53,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:53,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:53,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:53,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:15 [2021-06-05 06:27:53,977 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:53,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534883207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:53,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:53,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 06:27:53,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743291017] [2021-06-05 06:27:53,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:27:53,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:53,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:27:53,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:27:53,978 INFO L87 Difference]: Start difference. First operand 45563 states and 188405 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:56,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:56,469 INFO L93 Difference]: Finished difference Result 94335 states and 383012 transitions. [2021-06-05 06:27:56,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:27:56,470 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:27:56,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:56,736 INFO L225 Difference]: With dead ends: 94335 [2021-06-05 06:27:56,736 INFO L226 Difference]: Without dead ends: 94280 [2021-06-05 06:27:56,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1443.4ms TimeCoverageRelationStatistics Valid=427, Invalid=2435, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:27:56,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94280 states. [2021-06-05 06:27:57,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94280 to 45740. [2021-06-05 06:27:57,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45740 states, 45739 states have (on average 4.135923391416515) internal successors, (189173), 45739 states have internal predecessors, (189173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:58,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45740 states to 45740 states and 189173 transitions. [2021-06-05 06:27:58,363 INFO L78 Accepts]: Start accepts. Automaton has 45740 states and 189173 transitions. Word has length 39 [2021-06-05 06:27:58,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:58,363 INFO L482 AbstractCegarLoop]: Abstraction has 45740 states and 189173 transitions. [2021-06-05 06:27:58,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:58,363 INFO L276 IsEmpty]: Start isEmpty. Operand 45740 states and 189173 transitions. [2021-06-05 06:27:58,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:27:58,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:58,448 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:58,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable438 [2021-06-05 06:27:58,649 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:58,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:58,649 INFO L82 PathProgramCache]: Analyzing trace with hash -2046291667, now seen corresponding path program 91 times [2021-06-05 06:27:58,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:58,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037917092] [2021-06-05 06:27:58,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:58,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:58,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:58,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037917092] [2021-06-05 06:27:58,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037917092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:58,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488992703] [2021-06-05 06:27:58,916 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 [2021-06-05 06:27:58,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:58,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:27:58,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:59,058 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:27:59,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:27:59,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:59,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:59,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:59,063 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-06-05 06:27:59,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:27:59,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:59,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:59,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:59,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:27:59,202 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:59,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488992703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:59,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:59,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:27:59,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484090983] [2021-06-05 06:27:59,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:27:59,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:59,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:27:59,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:27:59,203 INFO L87 Difference]: Start difference. First operand 45740 states and 189173 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:01,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:28:01,181 INFO L93 Difference]: Finished difference Result 89214 states and 362971 transitions. [2021-06-05 06:28:01,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:28:01,181 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:28:01,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:28:01,433 INFO L225 Difference]: With dead ends: 89214 [2021-06-05 06:28:01,434 INFO L226 Difference]: Without dead ends: 89030 [2021-06-05 06:28:01,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 967.1ms TimeCoverageRelationStatistics Valid=358, Invalid=1804, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:28:01,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89030 states. [2021-06-05 06:28:02,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89030 to 45528. [2021-06-05 06:28:02,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45528 states, 45527 states have (on average 4.138950512882466) internal successors, (188434), 45527 states have internal predecessors, (188434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:02,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45528 states to 45528 states and 188434 transitions. [2021-06-05 06:28:02,763 INFO L78 Accepts]: Start accepts. Automaton has 45528 states and 188434 transitions. Word has length 39 [2021-06-05 06:28:02,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:28:02,763 INFO L482 AbstractCegarLoop]: Abstraction has 45528 states and 188434 transitions. [2021-06-05 06:28:02,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:02,763 INFO L276 IsEmpty]: Start isEmpty. Operand 45528 states and 188434 transitions. [2021-06-05 06:28:02,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:28:02,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:28:02,843 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:28:03,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-05 06:28:03,045 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:28:03,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:28:03,045 INFO L82 PathProgramCache]: Analyzing trace with hash 208901727, now seen corresponding path program 92 times [2021-06-05 06:28:03,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:28:03,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795554322] [2021-06-05 06:28:03,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:28:03,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:03,274 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:03,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:28:03,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795554322] [2021-06-05 06:28:03,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795554322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:03,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659527569] [2021-06-05 06:28:03,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:03,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:28:03,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:28:03,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:28:03,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:03,414 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:28:03,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:28:03,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:03,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:03,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:03,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-06-05 06:28:03,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 06:28:03,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:03,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:03,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:03,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-06-05 06:28:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:03,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659527569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:03,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:03,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:28:03,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317145484] [2021-06-05 06:28:03,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:28:03,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:03,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:28:03,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:28:03,548 INFO L87 Difference]: Start difference. First operand 45528 states and 188434 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:05,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:28:05,170 INFO L93 Difference]: Finished difference Result 79756 states and 328257 transitions. [2021-06-05 06:28:05,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:28:05,171 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:28:05,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:28:05,396 INFO L225 Difference]: With dead ends: 79756 [2021-06-05 06:28:05,396 INFO L226 Difference]: Without dead ends: 79701 [2021-06-05 06:28:05,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 733.8ms TimeCoverageRelationStatistics Valid=269, Invalid=1453, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:28:05,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79701 states. [2021-06-05 06:28:06,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79701 to 45068. [2021-06-05 06:28:06,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45068 states, 45067 states have (on average 4.140435351809528) internal successors, (186597), 45067 states have internal predecessors, (186597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:06,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45068 states to 45068 states and 186597 transitions. [2021-06-05 06:28:06,711 INFO L78 Accepts]: Start accepts. Automaton has 45068 states and 186597 transitions. Word has length 39 [2021-06-05 06:28:06,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:28:06,711 INFO L482 AbstractCegarLoop]: Abstraction has 45068 states and 186597 transitions. [2021-06-05 06:28:06,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:06,711 INFO L276 IsEmpty]: Start isEmpty. Operand 45068 states and 186597 transitions. [2021-06-05 06:28:06,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:28:06,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:28:06,789 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:28:06,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-06-05 06:28:06,989 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:28:06,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:28:06,989 INFO L82 PathProgramCache]: Analyzing trace with hash -2136317753, now seen corresponding path program 93 times [2021-06-05 06:28:06,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:28:06,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048121964] [2021-06-05 06:28:06,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:28:06,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:07,214 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:07,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:28:07,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048121964] [2021-06-05 06:28:07,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048121964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:07,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093838218] [2021-06-05 06:28:07,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:07,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:28:07,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:28:07,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 06:28:07,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:07,553 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-06-05 06:28:07,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:07,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:07,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-06-05 06:28:07,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:07,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:07,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:07,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:88 [2021-06-05 06:28:07,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 06:28:07,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:07,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:07,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:07,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-06-05 06:28:07,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:07,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:28:07,843 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:28:07,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:07,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:28:07,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 06:28:07,885 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:07,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093838218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:07,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:07,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:28:07,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380772897] [2021-06-05 06:28:07,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:28:07,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:07,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:28:07,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:28:07,886 INFO L87 Difference]: Start difference. First operand 45068 states and 186597 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:10,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:28:10,113 INFO L93 Difference]: Finished difference Result 79011 states and 323540 transitions. [2021-06-05 06:28:10,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:28:10,114 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:28:10,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:28:10,351 INFO L225 Difference]: With dead ends: 79011 [2021-06-05 06:28:10,351 INFO L226 Difference]: Without dead ends: 78956 [2021-06-05 06:28:10,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 1246.6ms TimeCoverageRelationStatistics Valid=422, Invalid=2884, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:28:10,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78956 states. [2021-06-05 06:28:11,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78956 to 45443. [2021-06-05 06:28:11,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45443 states, 45442 states have (on average 4.137780027287532) internal successors, (188029), 45442 states have internal predecessors, (188029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:11,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45443 states to 45443 states and 188029 transitions. [2021-06-05 06:28:11,550 INFO L78 Accepts]: Start accepts. Automaton has 45443 states and 188029 transitions. Word has length 39 [2021-06-05 06:28:11,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:28:11,551 INFO L482 AbstractCegarLoop]: Abstraction has 45443 states and 188029 transitions. [2021-06-05 06:28:11,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:11,551 INFO L276 IsEmpty]: Start isEmpty. Operand 45443 states and 188029 transitions. [2021-06-05 06:28:11,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:28:11,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:28:11,627 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:28:11,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 06:28:11,828 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:28:11,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:28:11,828 INFO L82 PathProgramCache]: Analyzing trace with hash -201798279, now seen corresponding path program 94 times [2021-06-05 06:28:11,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:28:11,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567792643] [2021-06-05 06:28:11,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:28:11,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:12,087 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:12,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:28:12,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567792643] [2021-06-05 06:28:12,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567792643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:12,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510815958] [2021-06-05 06:28:12,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:12,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:28:12,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:28:12,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:28:12,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:12,252 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:28:12,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:28:12,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:12,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:12,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:12,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 06:28:12,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:28:12,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:12,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:12,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:12,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:28:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:12,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510815958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:12,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:12,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:28:12,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976116635] [2021-06-05 06:28:12,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:28:12,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:12,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:28:12,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:28:12,377 INFO L87 Difference]: Start difference. First operand 45443 states and 188029 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:14,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:28:14,098 INFO L93 Difference]: Finished difference Result 75260 states and 308087 transitions. [2021-06-05 06:28:14,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:28:14,098 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:28:14,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:28:14,303 INFO L225 Difference]: With dead ends: 75260 [2021-06-05 06:28:14,303 INFO L226 Difference]: Without dead ends: 75044 [2021-06-05 06:28:14,304 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 976.4ms TimeCoverageRelationStatistics Valid=348, Invalid=1722, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:28:14,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75044 states. [2021-06-05 06:28:15,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75044 to 45399. [2021-06-05 06:28:15,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45399 states, 45398 states have (on average 4.138310057711793) internal successors, (187871), 45398 states have internal predecessors, (187871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:15,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45399 states to 45399 states and 187871 transitions. [2021-06-05 06:28:15,525 INFO L78 Accepts]: Start accepts. Automaton has 45399 states and 187871 transitions. Word has length 39 [2021-06-05 06:28:15,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:28:15,525 INFO L482 AbstractCegarLoop]: Abstraction has 45399 states and 187871 transitions. [2021-06-05 06:28:15,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:15,526 INFO L276 IsEmpty]: Start isEmpty. Operand 45399 states and 187871 transitions. [2021-06-05 06:28:15,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:28:15,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:28:15,603 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:28:15,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:15,803 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:28:15,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:28:15,804 INFO L82 PathProgramCache]: Analyzing trace with hash 401310577, now seen corresponding path program 95 times [2021-06-05 06:28:15,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:28:15,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999404365] [2021-06-05 06:28:15,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:28:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:16,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:28:16,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999404365] [2021-06-05 06:28:16,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999404365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:16,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14291998] [2021-06-05 06:28:16,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:16,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:28:16,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:28:16,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:28:16,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:16,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:16,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:16,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:16,277 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:16,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-06-05 06:28:16,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:28:16,305 INFO L628 ElimStorePlain]: treesize reduction 37, result has 54.3 percent of original size [2021-06-05 06:28:16,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:16,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:45 [2021-06-05 06:28:16,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:28:16,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:16,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:16,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:16,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:28:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:16,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14291998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:16,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:16,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 06:28:16,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313100186] [2021-06-05 06:28:16,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:28:16,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:16,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:28:16,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:28:16,474 INFO L87 Difference]: Start difference. First operand 45399 states and 187871 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:18,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:28:18,897 INFO L93 Difference]: Finished difference Result 72407 states and 295781 transitions. [2021-06-05 06:28:18,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:28:18,898 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:28:18,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:28:19,309 INFO L225 Difference]: With dead ends: 72407 [2021-06-05 06:28:19,309 INFO L226 Difference]: Without dead ends: 72279 [2021-06-05 06:28:19,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1535.8ms TimeCoverageRelationStatistics Valid=409, Invalid=2347, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:28:19,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72279 states. [2021-06-05 06:28:20,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72279 to 45567. [2021-06-05 06:28:20,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45567 states, 45566 states have (on average 4.136154150024141) internal successors, (188468), 45566 states have internal predecessors, (188468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:20,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45567 states to 45567 states and 188468 transitions. [2021-06-05 06:28:20,467 INFO L78 Accepts]: Start accepts. Automaton has 45567 states and 188468 transitions. Word has length 39 [2021-06-05 06:28:20,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:28:20,467 INFO L482 AbstractCegarLoop]: Abstraction has 45567 states and 188468 transitions. [2021-06-05 06:28:20,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:20,467 INFO L276 IsEmpty]: Start isEmpty. Operand 45567 states and 188468 transitions. [2021-06-05 06:28:20,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:28:20,551 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:28:20,551 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:28:20,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:20,751 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:28:20,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:28:20,752 INFO L82 PathProgramCache]: Analyzing trace with hash 337270923, now seen corresponding path program 96 times [2021-06-05 06:28:20,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:28:20,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11139753] [2021-06-05 06:28:20,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:28:20,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:20,993 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:20,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:28:20,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11139753] [2021-06-05 06:28:20,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11139753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:20,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694608007] [2021-06-05 06:28:20,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:21,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:28:21,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:28:21,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 06:28:21,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:21,174 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:21,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2021-06-05 06:28:21,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:21,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:21,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:21,196 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:43 [2021-06-05 06:28:21,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 06:28:21,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:21,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:21,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:21,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-06-05 06:28:21,338 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:21,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694608007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:21,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:21,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 06:28:21,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689410325] [2021-06-05 06:28:21,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:28:21,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:21,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:28:21,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:28:21,339 INFO L87 Difference]: Start difference. First operand 45567 states and 188468 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:24,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:28:24,163 INFO L93 Difference]: Finished difference Result 94920 states and 385436 transitions. [2021-06-05 06:28:24,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:28:24,164 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:28:24,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:28:24,428 INFO L225 Difference]: With dead ends: 94920 [2021-06-05 06:28:24,428 INFO L226 Difference]: Without dead ends: 94865 [2021-06-05 06:28:24,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1383.2ms TimeCoverageRelationStatistics Valid=467, Invalid=2613, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 06:28:24,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94865 states. [2021-06-05 06:28:25,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94865 to 45689. [2021-06-05 06:28:25,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45689 states, 45688 states have (on average 4.138811066363159) internal successors, (189094), 45688 states have internal predecessors, (189094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:25,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45689 states to 45689 states and 189094 transitions. [2021-06-05 06:28:25,836 INFO L78 Accepts]: Start accepts. Automaton has 45689 states and 189094 transitions. Word has length 39 [2021-06-05 06:28:25,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:28:25,836 INFO L482 AbstractCegarLoop]: Abstraction has 45689 states and 189094 transitions. [2021-06-05 06:28:25,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:25,836 INFO L276 IsEmpty]: Start isEmpty. Operand 45689 states and 189094 transitions. [2021-06-05 06:28:25,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:28:25,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:28:25,915 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:28:26,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-06-05 06:28:26,116 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:28:26,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:28:26,116 INFO L82 PathProgramCache]: Analyzing trace with hash 2041933109, now seen corresponding path program 97 times [2021-06-05 06:28:26,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:28:26,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621074251] [2021-06-05 06:28:26,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:28:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:26,519 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-06-05 06:28:26,608 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:26,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:28:26,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621074251] [2021-06-05 06:28:26,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621074251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:26,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430964691] [2021-06-05 06:28:26,608 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:26,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:28:26,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:26,767 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:28:26,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:28:26,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:26,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:26,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:26,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 06:28:26,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 06:28:26,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:26,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:26,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:26,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-06-05 06:28:26,892 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:26,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430964691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:26,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:26,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:28:26,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838799909] [2021-06-05 06:28:26,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:28:26,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:26,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:28:26,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:28:26,893 INFO L87 Difference]: Start difference. First operand 45689 states and 189094 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:28,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:28:28,346 INFO L93 Difference]: Finished difference Result 79793 states and 328412 transitions. [2021-06-05 06:28:28,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:28:28,347 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:28:28,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:28:28,842 INFO L225 Difference]: With dead ends: 79793 [2021-06-05 06:28:28,843 INFO L226 Difference]: Without dead ends: 79738 [2021-06-05 06:28:28,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 984.9ms TimeCoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:28:28,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79738 states. [2021-06-05 06:28:29,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79738 to 45408. [2021-06-05 06:28:29,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45408 states, 45407 states have (on average 4.137115422732178) internal successors, (187854), 45407 states have internal predecessors, (187854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:30,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45408 states to 45408 states and 187854 transitions. [2021-06-05 06:28:30,132 INFO L78 Accepts]: Start accepts. Automaton has 45408 states and 187854 transitions. Word has length 39 [2021-06-05 06:28:30,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:28:30,132 INFO L482 AbstractCegarLoop]: Abstraction has 45408 states and 187854 transitions. [2021-06-05 06:28:30,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:30,132 INFO L276 IsEmpty]: Start isEmpty. Operand 45408 states and 187854 transitions. [2021-06-05 06:28:30,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:28:30,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:28:30,208 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:28:30,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable458,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:30,409 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:28:30,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:28:30,410 INFO L82 PathProgramCache]: Analyzing trace with hash 210357187, now seen corresponding path program 98 times [2021-06-05 06:28:30,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:28:30,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794231992] [2021-06-05 06:28:30,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:28:30,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:30,674 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:30,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:28:30,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794231992] [2021-06-05 06:28:30,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794231992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:30,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090794175] [2021-06-05 06:28:30,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:30,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:28:30,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:28:30,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:28:30,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:30,848 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:28:30,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:28:30,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:30,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:30,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:30,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 06:28:30,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:28:30,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:30,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:30,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:30,939 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:28:30,976 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:30,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090794175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:30,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:30,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:28:30,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936105240] [2021-06-05 06:28:30,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:28:30,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:30,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:28:30,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:28:30,977 INFO L87 Difference]: Start difference. First operand 45408 states and 187854 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:32,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:28:32,763 INFO L93 Difference]: Finished difference Result 89040 states and 362265 transitions. [2021-06-05 06:28:32,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:28:32,763 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:28:32,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:28:33,014 INFO L225 Difference]: With dead ends: 89040 [2021-06-05 06:28:33,015 INFO L226 Difference]: Without dead ends: 88856 [2021-06-05 06:28:33,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 968.4ms TimeCoverageRelationStatistics Valid=365, Invalid=1797, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:28:33,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88856 states. [2021-06-05 06:28:34,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88856 to 45102. [2021-06-05 06:28:34,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45102 states, 45101 states have (on average 4.140329482716569) internal successors, (186733), 45101 states have internal predecessors, (186733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:34,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45102 states to 45102 states and 186733 transitions. [2021-06-05 06:28:34,377 INFO L78 Accepts]: Start accepts. Automaton has 45102 states and 186733 transitions. Word has length 39 [2021-06-05 06:28:34,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:28:34,377 INFO L482 AbstractCegarLoop]: Abstraction has 45102 states and 186733 transitions. [2021-06-05 06:28:34,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:34,377 INFO L276 IsEmpty]: Start isEmpty. Operand 45102 states and 186733 transitions. [2021-06-05 06:28:34,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:28:34,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:28:34,454 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:28:34,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-06-05 06:28:34,655 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:28:34,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:28:34,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1628962993, now seen corresponding path program 99 times [2021-06-05 06:28:34,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:28:34,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788701834] [2021-06-05 06:28:34,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:28:34,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:34,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:28:34,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788701834] [2021-06-05 06:28:34,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788701834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:34,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222027159] [2021-06-05 06:28:34,907 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 [2021-06-05 06:28:34,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:28:34,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:28:34,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 06:28:34,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:35,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:35,165 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:35,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-06-05 06:28:35,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:35,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:35,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:28:35,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:50 [2021-06-05 06:28:35,322 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:35,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 46 [2021-06-05 06:28:35,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:35,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:35,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:35,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:116 [2021-06-05 06:28:35,664 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-06-05 06:28:36,000 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_105], 3=[q2, v_prenex_104]} [2021-06-05 06:28:36,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:36,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 06:28:36,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:36,118 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-06-05 06:28:36,119 INFO L628 ElimStorePlain]: treesize reduction 235, result has 40.7 percent of original size [2021-06-05 06:28:36,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:36,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2021-06-05 06:28:36,123 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:36,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:36,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:36,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:36,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-06-05 06:28:36,132 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:28:36,185 INFO L628 ElimStorePlain]: treesize reduction 71, result has 48.6 percent of original size [2021-06-05 06:28:36,185 INFO L518 ElimStorePlain]: Eliminatee v_prenex_104 vanished before elimination [2021-06-05 06:28:36,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:28:36,187 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:407, output treesize:65 [2021-06-05 06:28:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:36,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222027159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:36,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:36,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 06:28:36,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208627505] [2021-06-05 06:28:36,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 06:28:36,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:36,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 06:28:36,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:28:36,252 INFO L87 Difference]: Start difference. First operand 45102 states and 186733 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:37,505 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 74 [2021-06-05 06:28:37,856 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-06-05 06:28:38,061 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2021-06-05 06:28:38,944 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-06-05 06:28:39,168 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 52 [2021-06-05 06:28:39,763 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 68 [2021-06-05 06:28:41,823 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2021-06-05 06:28:42,234 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-06-05 06:28:42,610 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-06-05 06:28:43,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:28:43,265 INFO L93 Difference]: Finished difference Result 78707 states and 320669 transitions. [2021-06-05 06:28:43,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 06:28:43,265 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:28:43,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:28:43,480 INFO L225 Difference]: With dead ends: 78707 [2021-06-05 06:28:43,480 INFO L226 Difference]: Without dead ends: 78625 [2021-06-05 06:28:43,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3007 ImplicationChecksByTransitivity, 5753.5ms TimeCoverageRelationStatistics Valid=980, Invalid=8526, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 06:28:43,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78625 states. [2021-06-05 06:28:44,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78625 to 45745. [2021-06-05 06:28:44,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45745 states, 45744 states have (on average 4.136323889471844) internal successors, (189212), 45744 states have internal predecessors, (189212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:44,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45745 states to 45745 states and 189212 transitions. [2021-06-05 06:28:44,635 INFO L78 Accepts]: Start accepts. Automaton has 45745 states and 189212 transitions. Word has length 39 [2021-06-05 06:28:44,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:28:44,636 INFO L482 AbstractCegarLoop]: Abstraction has 45745 states and 189212 transitions. [2021-06-05 06:28:44,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:44,636 INFO L276 IsEmpty]: Start isEmpty. Operand 45745 states and 189212 transitions. [2021-06-05 06:28:44,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:28:44,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:28:44,713 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:28:44,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:44,914 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:28:44,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:28:44,914 INFO L82 PathProgramCache]: Analyzing trace with hash -867045925, now seen corresponding path program 100 times [2021-06-05 06:28:44,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:28:44,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769132804] [2021-06-05 06:28:44,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:28:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:45,139 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:45,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:28:45,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769132804] [2021-06-05 06:28:45,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769132804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:45,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854797545] [2021-06-05 06:28:45,139 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 [2021-06-05 06:28:45,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:28:45,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:28:45,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:28:45,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:45,507 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:28:45,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:28:45,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:45,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:45,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:45,514 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 06:28:45,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 06:28:45,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:45,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:45,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:45,544 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-06-05 06:28:45,598 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:45,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854797545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:45,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:45,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:28:45,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731808376] [2021-06-05 06:28:45,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:28:45,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:45,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:28:45,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:28:45,599 INFO L87 Difference]: Start difference. First operand 45745 states and 189212 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:46,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:28:46,896 INFO L93 Difference]: Finished difference Result 79931 states and 328985 transitions. [2021-06-05 06:28:46,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:28:46,896 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:28:46,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:28:47,118 INFO L225 Difference]: With dead ends: 79931 [2021-06-05 06:28:47,118 INFO L226 Difference]: Without dead ends: 79876 [2021-06-05 06:28:47,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 710.6ms TimeCoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:28:47,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79876 states. [2021-06-05 06:28:48,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79876 to 45624. [2021-06-05 06:28:48,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45624 states, 45623 states have (on average 4.137123819126318) internal successors, (188748), 45623 states have internal predecessors, (188748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:48,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45624 states to 45624 states and 188748 transitions. [2021-06-05 06:28:48,683 INFO L78 Accepts]: Start accepts. Automaton has 45624 states and 188748 transitions. Word has length 39 [2021-06-05 06:28:48,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:28:48,683 INFO L482 AbstractCegarLoop]: Abstraction has 45624 states and 188748 transitions. [2021-06-05 06:28:48,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:48,683 INFO L276 IsEmpty]: Start isEmpty. Operand 45624 states and 188748 transitions. [2021-06-05 06:28:48,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:28:48,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:28:48,775 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:28:48,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:48,976 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:28:48,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:28:48,976 INFO L82 PathProgramCache]: Analyzing trace with hash -731484829, now seen corresponding path program 101 times [2021-06-05 06:28:48,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:28:48,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225060520] [2021-06-05 06:28:48,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:28:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:49,240 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:49,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:28:49,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225060520] [2021-06-05 06:28:49,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225060520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:49,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268094331] [2021-06-05 06:28:49,241 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 [2021-06-05 06:28:49,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:28:49,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:28:49,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 06:28:49,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:49,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:49,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:49,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:49,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:49,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-06-05 06:28:49,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:28:49,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:49,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:49,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:42 [2021-06-05 06:28:49,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:28:49,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:49,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:49,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:28:49,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 06:28:49,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:49,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:49,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:49,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:49,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-06-05 06:28:49,607 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:28:49,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:49,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:28:49,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 06:28:49,658 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:49,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268094331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:49,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:49,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:28:49,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212577858] [2021-06-05 06:28:49,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:28:49,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:49,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:28:49,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:28:49,658 INFO L87 Difference]: Start difference. First operand 45624 states and 188748 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:53,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:28:53,252 INFO L93 Difference]: Finished difference Result 83001 states and 338646 transitions. [2021-06-05 06:28:53,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 06:28:53,252 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:28:53,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:28:53,475 INFO L225 Difference]: With dead ends: 83001 [2021-06-05 06:28:53,476 INFO L226 Difference]: Without dead ends: 82572 [2021-06-05 06:28:53,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 2181.2ms TimeCoverageRelationStatistics Valid=717, Invalid=5135, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 06:28:53,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82572 states. [2021-06-05 06:28:54,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82572 to 46140. [2021-06-05 06:28:54,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46140 states, 46139 states have (on average 4.1339864323023905) internal successors, (190738), 46139 states have internal predecessors, (190738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:54,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46140 states to 46140 states and 190738 transitions. [2021-06-05 06:28:54,693 INFO L78 Accepts]: Start accepts. Automaton has 46140 states and 190738 transitions. Word has length 39 [2021-06-05 06:28:54,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:28:54,693 INFO L482 AbstractCegarLoop]: Abstraction has 46140 states and 190738 transitions. [2021-06-05 06:28:54,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:54,693 INFO L276 IsEmpty]: Start isEmpty. Operand 46140 states and 190738 transitions. [2021-06-05 06:28:54,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:28:54,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:28:54,776 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:28:54,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-05 06:28:54,976 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:28:54,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:28:54,976 INFO L82 PathProgramCache]: Analyzing trace with hash -869929743, now seen corresponding path program 102 times [2021-06-05 06:28:54,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:28:54,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700628814] [2021-06-05 06:28:54,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:28:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:55,310 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-06-05 06:28:55,481 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:55,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:28:55,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700628814] [2021-06-05 06:28:55,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700628814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:55,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050104332] [2021-06-05 06:28:55,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:55,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:28:55,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:28:55,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 06:28:55,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:55,663 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:28:55,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:28:55,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:55,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:55,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:55,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-06-05 06:28:55,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:28:55,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:55,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:55,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:55,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:28:55,764 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:55,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050104332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:55,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:55,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:28:55,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462828500] [2021-06-05 06:28:55,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:28:55,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:55,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:28:55,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:28:55,764 INFO L87 Difference]: Start difference. First operand 46140 states and 190738 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:57,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:28:57,610 INFO L93 Difference]: Finished difference Result 90463 states and 367919 transitions. [2021-06-05 06:28:57,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 06:28:57,611 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:28:57,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:28:57,855 INFO L225 Difference]: With dead ends: 90463 [2021-06-05 06:28:57,855 INFO L226 Difference]: Without dead ends: 90247 [2021-06-05 06:28:57,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1086.8ms TimeCoverageRelationStatistics Valid=424, Invalid=2228, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 06:28:57,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90247 states. [2021-06-05 06:28:58,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90247 to 45740. [2021-06-05 06:28:58,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45740 states, 45739 states have (on average 4.136163886398916) internal successors, (189184), 45739 states have internal predecessors, (189184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:59,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45740 states to 45740 states and 189184 transitions. [2021-06-05 06:28:59,129 INFO L78 Accepts]: Start accepts. Automaton has 45740 states and 189184 transitions. Word has length 39 [2021-06-05 06:28:59,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:28:59,129 INFO L482 AbstractCegarLoop]: Abstraction has 45740 states and 189184 transitions. [2021-06-05 06:28:59,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:59,129 INFO L276 IsEmpty]: Start isEmpty. Operand 45740 states and 189184 transitions. [2021-06-05 06:28:59,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:28:59,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:28:59,207 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:28:59,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-06-05 06:28:59,408 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:28:59,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:28:59,408 INFO L82 PathProgramCache]: Analyzing trace with hash 471732141, now seen corresponding path program 103 times [2021-06-05 06:28:59,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:28:59,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165853656] [2021-06-05 06:28:59,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:28:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:59,652 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:59,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:28:59,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165853656] [2021-06-05 06:28:59,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165853656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:59,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406011363] [2021-06-05 06:28:59,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:59,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:59,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:28:59,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:59,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:28:59,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:59,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:59,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:59,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 06:28:59,874 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:28:59,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 06:28:59,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:59,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:59,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:59,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-06-05 06:28:59,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:59,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406011363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:59,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:59,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 06:28:59,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906528947] [2021-06-05 06:28:59,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:28:59,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:59,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:28:59,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:28:59,916 INFO L87 Difference]: Start difference. First operand 45740 states and 189184 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:01,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:01,497 INFO L93 Difference]: Finished difference Result 82993 states and 341560 transitions. [2021-06-05 06:29:01,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:29:01,497 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:29:01,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:01,732 INFO L225 Difference]: With dead ends: 82993 [2021-06-05 06:29:01,732 INFO L226 Difference]: Without dead ends: 82938 [2021-06-05 06:29:01,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 680.0ms TimeCoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:29:01,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82938 states. [2021-06-05 06:29:02,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82938 to 45928. [2021-06-05 06:29:02,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45928 states, 45927 states have (on average 4.1409846060051825) internal successors, (190183), 45927 states have internal predecessors, (190183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:03,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45928 states to 45928 states and 190183 transitions. [2021-06-05 06:29:03,038 INFO L78 Accepts]: Start accepts. Automaton has 45928 states and 190183 transitions. Word has length 39 [2021-06-05 06:29:03,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:03,038 INFO L482 AbstractCegarLoop]: Abstraction has 45928 states and 190183 transitions. [2021-06-05 06:29:03,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:03,038 INFO L276 IsEmpty]: Start isEmpty. Operand 45928 states and 190183 transitions. [2021-06-05 06:29:03,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:29:03,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:03,118 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:03,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:03,318 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:03,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:03,318 INFO L82 PathProgramCache]: Analyzing trace with hash -165855889, now seen corresponding path program 104 times [2021-06-05 06:29:03,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:03,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254646627] [2021-06-05 06:29:03,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:03,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:03,565 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:03,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:03,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254646627] [2021-06-05 06:29:03,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254646627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:03,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363947074] [2021-06-05 06:29:03,565 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 [2021-06-05 06:29:03,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:29:03,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:03,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 06:29:03,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:03,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:29:03,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:03,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:03,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:03,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:37 [2021-06-05 06:29:03,828 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:29:03,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 06:29:03,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:03,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:03,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:03,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:9 [2021-06-05 06:29:03,857 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:03,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:29:03,858 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:29:03,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:03,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:29:03,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 06:29:03,897 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:03,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363947074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:03,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:03,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 06:29:03,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457143837] [2021-06-05 06:29:03,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:29:03,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:03,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:29:03,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:29:03,898 INFO L87 Difference]: Start difference. First operand 45928 states and 190183 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:06,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:06,089 INFO L93 Difference]: Finished difference Result 103653 states and 427349 transitions. [2021-06-05 06:29:06,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:29:06,089 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:29:06,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:06,693 INFO L225 Difference]: With dead ends: 103653 [2021-06-05 06:29:06,694 INFO L226 Difference]: Without dead ends: 103598 [2021-06-05 06:29:06,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1011.1ms TimeCoverageRelationStatistics Valid=360, Invalid=2190, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:29:06,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103598 states. [2021-06-05 06:29:07,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103598 to 46168. [2021-06-05 06:29:08,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46168 states, 46167 states have (on average 4.142417744276215) internal successors, (191243), 46167 states have internal predecessors, (191243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:08,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46168 states to 46168 states and 191243 transitions. [2021-06-05 06:29:08,146 INFO L78 Accepts]: Start accepts. Automaton has 46168 states and 191243 transitions. Word has length 39 [2021-06-05 06:29:08,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:08,146 INFO L482 AbstractCegarLoop]: Abstraction has 46168 states and 191243 transitions. [2021-06-05 06:29:08,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:08,147 INFO L276 IsEmpty]: Start isEmpty. Operand 46168 states and 191243 transitions. [2021-06-05 06:29:08,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:29:08,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:08,227 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:08,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:08,427 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:08,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:08,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1253137135, now seen corresponding path program 105 times [2021-06-05 06:29:08,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:08,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277943577] [2021-06-05 06:29:08,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:08,648 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:08,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:08,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277943577] [2021-06-05 06:29:08,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277943577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:08,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249213004] [2021-06-05 06:29:08,649 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 [2021-06-05 06:29:08,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:29:08,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:08,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 06:29:08,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:08,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:08,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:29:08,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:29:08,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:08,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:08,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:08,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:37 [2021-06-05 06:29:09,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:09,071 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:09,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 53 [2021-06-05 06:29:09,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:09,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:09,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:09,080 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 06:29:09,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:09,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:09,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 31 [2021-06-05 06:29:09,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:29:09,156 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 06:29:09,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 12 [2021-06-05 06:29:09,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:09,163 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 06:29:09,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 12 [2021-06-05 06:29:09,164 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:09,214 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.1 percent of original size [2021-06-05 06:29:09,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:29:09,216 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:116, output treesize:81 [2021-06-05 06:29:09,324 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:09,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249213004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:09,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:09,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 06:29:09,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5039955] [2021-06-05 06:29:09,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 06:29:09,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:09,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 06:29:09,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:29:09,325 INFO L87 Difference]: Start difference. First operand 46168 states and 191243 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:14,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:14,324 INFO L93 Difference]: Finished difference Result 99309 states and 407027 transitions. [2021-06-05 06:29:14,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 06:29:14,325 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:29:14,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:14,634 INFO L225 Difference]: With dead ends: 99309 [2021-06-05 06:29:14,634 INFO L226 Difference]: Without dead ends: 99215 [2021-06-05 06:29:14,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1899 ImplicationChecksByTransitivity, 2750.2ms TimeCoverageRelationStatistics Valid=782, Invalid=5698, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 06:29:14,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99215 states. [2021-06-05 06:29:15,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99215 to 46358. [2021-06-05 06:29:15,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46358 states, 46357 states have (on average 4.141445736350497) internal successors, (191985), 46357 states have internal predecessors, (191985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:16,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46358 states to 46358 states and 191985 transitions. [2021-06-05 06:29:16,034 INFO L78 Accepts]: Start accepts. Automaton has 46358 states and 191985 transitions. Word has length 39 [2021-06-05 06:29:16,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:16,034 INFO L482 AbstractCegarLoop]: Abstraction has 46358 states and 191985 transitions. [2021-06-05 06:29:16,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:16,034 INFO L276 IsEmpty]: Start isEmpty. Operand 46358 states and 191985 transitions. [2021-06-05 06:29:16,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:29:16,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:16,113 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:16,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:16,314 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:16,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:16,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1564815849, now seen corresponding path program 106 times [2021-06-05 06:29:16,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:16,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581398676] [2021-06-05 06:29:16,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:16,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:16,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:16,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581398676] [2021-06-05 06:29:16,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581398676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:16,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212127483] [2021-06-05 06:29:16,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:16,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:29:16,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:16,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:29:16,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:17,134 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:29:17,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:29:17,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:17,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:17,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:17,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-06-05 06:29:17,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:29:17,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:17,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:17,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:17,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:29:17,207 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:17,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212127483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:17,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:17,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:29:17,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437516545] [2021-06-05 06:29:17,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:29:17,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:17,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:29:17,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:29:17,208 INFO L87 Difference]: Start difference. First operand 46358 states and 191985 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:18,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:18,554 INFO L93 Difference]: Finished difference Result 76448 states and 312769 transitions. [2021-06-05 06:29:18,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:29:18,554 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:29:18,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:18,770 INFO L225 Difference]: With dead ends: 76448 [2021-06-05 06:29:18,770 INFO L226 Difference]: Without dead ends: 76200 [2021-06-05 06:29:18,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1207.3ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:29:19,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76200 states. [2021-06-05 06:29:19,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76200 to 46544. [2021-06-05 06:29:19,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46544 states, 46543 states have (on average 4.139935113765765) internal successors, (192685), 46543 states have internal predecessors, (192685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:20,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46544 states to 46544 states and 192685 transitions. [2021-06-05 06:29:20,293 INFO L78 Accepts]: Start accepts. Automaton has 46544 states and 192685 transitions. Word has length 39 [2021-06-05 06:29:20,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:20,293 INFO L482 AbstractCegarLoop]: Abstraction has 46544 states and 192685 transitions. [2021-06-05 06:29:20,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:20,294 INFO L276 IsEmpty]: Start isEmpty. Operand 46544 states and 192685 transitions. [2021-06-05 06:29:20,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:29:20,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:20,378 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:20,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable517 [2021-06-05 06:29:20,579 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:20,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:20,579 INFO L82 PathProgramCache]: Analyzing trace with hash 452270203, now seen corresponding path program 107 times [2021-06-05 06:29:20,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:20,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182208835] [2021-06-05 06:29:20,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:20,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:20,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:20,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182208835] [2021-06-05 06:29:20,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182208835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:20,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026723769] [2021-06-05 06:29:20,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:20,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:29:20,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:20,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 06:29:20,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:21,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:21,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 06:29:21,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:21,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:21,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:29:21,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:81 [2021-06-05 06:29:21,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:21,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-06-05 06:29:21,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:21,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:21,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 06:29:21,307 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:21,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:21,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2021-06-05 06:29:21,310 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:21,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:21,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 06:29:21,336 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:178, output treesize:85 [2021-06-05 06:29:21,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:21,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:21,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:21,523 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:21,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-06-05 06:29:21,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:29:21,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:21,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:29:21,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 06:29:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:21,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026723769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:21,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:21,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:29:21,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207456435] [2021-06-05 06:29:21,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:29:21,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:21,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:29:21,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:29:21,584 INFO L87 Difference]: Start difference. First operand 46544 states and 192685 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:26,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:26,810 INFO L93 Difference]: Finished difference Result 97317 states and 395236 transitions. [2021-06-05 06:29:26,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 06:29:26,810 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:29:26,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:27,085 INFO L225 Difference]: With dead ends: 97317 [2021-06-05 06:29:27,085 INFO L226 Difference]: Without dead ends: 96834 [2021-06-05 06:29:27,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2273 ImplicationChecksByTransitivity, 3633.2ms TimeCoverageRelationStatistics Valid=1151, Invalid=6681, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 06:29:27,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96834 states. [2021-06-05 06:29:28,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96834 to 46666. [2021-06-05 06:29:28,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46666 states, 46665 states have (on average 4.139569270331084) internal successors, (193173), 46665 states have internal predecessors, (193173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:28,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46666 states to 46666 states and 193173 transitions. [2021-06-05 06:29:28,475 INFO L78 Accepts]: Start accepts. Automaton has 46666 states and 193173 transitions. Word has length 39 [2021-06-05 06:29:28,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:28,475 INFO L482 AbstractCegarLoop]: Abstraction has 46666 states and 193173 transitions. [2021-06-05 06:29:28,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:28,475 INFO L276 IsEmpty]: Start isEmpty. Operand 46666 states and 193173 transitions. [2021-06-05 06:29:28,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:29:28,554 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:28,554 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:28,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:28,754 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:28,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:28,755 INFO L82 PathProgramCache]: Analyzing trace with hash 656190949, now seen corresponding path program 108 times [2021-06-05 06:29:28,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:28,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469419940] [2021-06-05 06:29:28,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:29,025 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:29,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:29,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469419940] [2021-06-05 06:29:29,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469419940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:29,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480333981] [2021-06-05 06:29:29,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:29,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:29:29,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:29,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 06:29:29,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:29,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:29:29,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:29,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:29,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:29,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:38 [2021-06-05 06:29:29,278 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:29:29,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 06:29:29,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:29,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:29,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:29,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:9 [2021-06-05 06:29:29,305 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:29,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:29:29,306 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:29:29,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:29,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:29:29,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 06:29:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:29,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480333981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:29,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:29,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 06:29:29,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624512043] [2021-06-05 06:29:29,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:29:29,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:29,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:29:29,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:29:29,354 INFO L87 Difference]: Start difference. First operand 46666 states and 193173 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:32,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:32,198 INFO L93 Difference]: Finished difference Result 80018 states and 326348 transitions. [2021-06-05 06:29:32,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:29:32,198 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:29:32,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:32,417 INFO L225 Difference]: With dead ends: 80018 [2021-06-05 06:29:32,417 INFO L226 Difference]: Without dead ends: 79854 [2021-06-05 06:29:32,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1385.1ms TimeCoverageRelationStatistics Valid=501, Invalid=2469, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:29:32,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79854 states. [2021-06-05 06:29:33,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79854 to 46968. [2021-06-05 06:29:33,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46968 states, 46967 states have (on average 4.137905337790364) internal successors, (194345), 46967 states have internal predecessors, (194345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:33,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46968 states to 46968 states and 194345 transitions. [2021-06-05 06:29:33,686 INFO L78 Accepts]: Start accepts. Automaton has 46968 states and 194345 transitions. Word has length 39 [2021-06-05 06:29:33,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:33,686 INFO L482 AbstractCegarLoop]: Abstraction has 46968 states and 194345 transitions. [2021-06-05 06:29:33,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:33,686 INFO L276 IsEmpty]: Start isEmpty. Operand 46968 states and 194345 transitions. [2021-06-05 06:29:33,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:29:33,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:33,767 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:33,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-06-05 06:29:33,973 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:33,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:33,973 INFO L82 PathProgramCache]: Analyzing trace with hash -941570975, now seen corresponding path program 109 times [2021-06-05 06:29:33,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:33,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914574145] [2021-06-05 06:29:33,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:33,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:34,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:34,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914574145] [2021-06-05 06:29:34,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914574145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:34,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013677604] [2021-06-05 06:29:34,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:34,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:29:34,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:34,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:29:34,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:34,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:34,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:34,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 06:29:34,479 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:29:34,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:29:34,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:34,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:34,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:34,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:29:34,519 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:34,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013677604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:34,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:34,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:29:34,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931181267] [2021-06-05 06:29:34,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:29:34,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:34,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:29:34,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:29:34,520 INFO L87 Difference]: Start difference. First operand 46968 states and 194345 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:36,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:36,496 INFO L93 Difference]: Finished difference Result 107264 states and 435928 transitions. [2021-06-05 06:29:36,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:29:36,497 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:29:36,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:36,821 INFO L225 Difference]: With dead ends: 107264 [2021-06-05 06:29:36,821 INFO L226 Difference]: Without dead ends: 107128 [2021-06-05 06:29:36,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 976.5ms TimeCoverageRelationStatistics Valid=385, Invalid=1871, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:29:36,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107128 states. [2021-06-05 06:29:38,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107128 to 46468. [2021-06-05 06:29:38,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46468 states, 46467 states have (on average 4.140766565519616) internal successors, (192409), 46467 states have internal predecessors, (192409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:38,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46468 states to 46468 states and 192409 transitions. [2021-06-05 06:29:38,695 INFO L78 Accepts]: Start accepts. Automaton has 46468 states and 192409 transitions. Word has length 39 [2021-06-05 06:29:38,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:38,695 INFO L482 AbstractCegarLoop]: Abstraction has 46468 states and 192409 transitions. [2021-06-05 06:29:38,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:38,699 INFO L276 IsEmpty]: Start isEmpty. Operand 46468 states and 192409 transitions. [2021-06-05 06:29:38,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:29:38,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:38,786 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:38,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable533,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:38,986 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:38,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:38,987 INFO L82 PathProgramCache]: Analyzing trace with hash -6081193, now seen corresponding path program 110 times [2021-06-05 06:29:38,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:38,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944649714] [2021-06-05 06:29:38,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:39,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:39,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944649714] [2021-06-05 06:29:39,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944649714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:39,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053000153] [2021-06-05 06:29:39,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:39,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:29:39,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:39,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:29:39,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:39,452 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:29:39,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:29:39,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:39,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:39,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:39,459 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 06:29:39,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:29:39,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:39,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:39,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:39,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:29:39,556 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:39,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053000153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:39,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:39,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:29:39,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921992991] [2021-06-05 06:29:39,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:29:39,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:39,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:29:39,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:29:39,557 INFO L87 Difference]: Start difference. First operand 46468 states and 192409 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:41,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:41,102 INFO L93 Difference]: Finished difference Result 75585 states and 309501 transitions. [2021-06-05 06:29:41,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:29:41,102 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:29:41,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:41,320 INFO L225 Difference]: With dead ends: 75585 [2021-06-05 06:29:41,320 INFO L226 Difference]: Without dead ends: 75393 [2021-06-05 06:29:41,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 869.2ms TimeCoverageRelationStatistics Valid=311, Invalid=1411, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:29:41,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75393 states. [2021-06-05 06:29:42,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75393 to 46492. [2021-06-05 06:29:42,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46492 states, 46491 states have (on average 4.14043578326988) internal successors, (192493), 46491 states have internal predecessors, (192493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:42,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46492 states to 46492 states and 192493 transitions. [2021-06-05 06:29:42,573 INFO L78 Accepts]: Start accepts. Automaton has 46492 states and 192493 transitions. Word has length 39 [2021-06-05 06:29:42,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:42,573 INFO L482 AbstractCegarLoop]: Abstraction has 46492 states and 192493 transitions. [2021-06-05 06:29:42,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:42,573 INFO L276 IsEmpty]: Start isEmpty. Operand 46492 states and 192493 transitions. [2021-06-05 06:29:42,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:29:42,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:42,653 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:42,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable534 [2021-06-05 06:29:42,854 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:42,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:42,854 INFO L82 PathProgramCache]: Analyzing trace with hash 2143700845, now seen corresponding path program 111 times [2021-06-05 06:29:42,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:42,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509464099] [2021-06-05 06:29:42,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:42,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:43,142 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:43,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:43,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509464099] [2021-06-05 06:29:43,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509464099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:43,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193524011] [2021-06-05 06:29:43,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:43,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:29:43,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:43,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 06:29:43,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:43,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:43,421 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:43,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-06-05 06:29:43,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:43,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:43,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:43,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:106 [2021-06-05 06:29:43,539 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:43,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-06-05 06:29:43,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:43,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:43,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:43,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:40 [2021-06-05 06:29:43,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:43,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:29:43,622 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:29:43,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:43,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 06:29:43,626 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:43,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:29:43,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:43,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 9 [2021-06-05 06:29:43,630 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:43,669 INFO L628 ElimStorePlain]: treesize reduction 46, result has 50.0 percent of original size [2021-06-05 06:29:43,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:29:43,671 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:123, output treesize:47 [2021-06-05 06:29:43,817 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:43,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193524011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:43,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:43,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-06-05 06:29:43,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079547316] [2021-06-05 06:29:43,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 06:29:43,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:43,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 06:29:43,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:29:43,818 INFO L87 Difference]: Start difference. First operand 46492 states and 192493 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:44,667 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2021-06-05 06:29:47,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:47,543 INFO L93 Difference]: Finished difference Result 73353 states and 298508 transitions. [2021-06-05 06:29:47,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 06:29:47,543 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:29:47,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:47,745 INFO L225 Difference]: With dead ends: 73353 [2021-06-05 06:29:47,745 INFO L226 Difference]: Without dead ends: 73205 [2021-06-05 06:29:47,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1492 ImplicationChecksByTransitivity, 3008.0ms TimeCoverageRelationStatistics Valid=819, Invalid=4293, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 06:29:47,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73205 states. [2021-06-05 06:29:48,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73205 to 46786. [2021-06-05 06:29:48,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46786 states, 46785 states have (on average 4.13728759217698) internal successors, (193563), 46785 states have internal predecessors, (193563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:48,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46786 states to 46786 states and 193563 transitions. [2021-06-05 06:29:48,971 INFO L78 Accepts]: Start accepts. Automaton has 46786 states and 193563 transitions. Word has length 39 [2021-06-05 06:29:48,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:48,971 INFO L482 AbstractCegarLoop]: Abstraction has 46786 states and 193563 transitions. [2021-06-05 06:29:48,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:48,971 INFO L276 IsEmpty]: Start isEmpty. Operand 46786 states and 193563 transitions. [2021-06-05 06:29:49,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:29:49,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:49,052 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:49,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable535,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:49,252 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:49,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:49,252 INFO L82 PathProgramCache]: Analyzing trace with hash 461863935, now seen corresponding path program 112 times [2021-06-05 06:29:49,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:49,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811746910] [2021-06-05 06:29:49,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:49,544 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:49,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:49,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811746910] [2021-06-05 06:29:49,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811746910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:49,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65337239] [2021-06-05 06:29:49,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:49,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:29:49,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:49,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:29:49,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:49,763 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:29:49,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:29:49,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:49,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:49,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:49,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-06-05 06:29:49,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:29:49,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:49,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:49,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:49,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:29:49,838 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:49,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65337239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:49,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:49,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:29:49,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134923652] [2021-06-05 06:29:49,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:29:49,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:49,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:29:49,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:29:49,839 INFO L87 Difference]: Start difference. First operand 46786 states and 193563 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:51,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:51,728 INFO L93 Difference]: Finished difference Result 90997 states and 370071 transitions. [2021-06-05 06:29:51,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:29:51,729 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:29:51,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:51,991 INFO L225 Difference]: With dead ends: 90997 [2021-06-05 06:29:51,991 INFO L226 Difference]: Without dead ends: 90773 [2021-06-05 06:29:51,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1057.7ms TimeCoverageRelationStatistics Valid=416, Invalid=1936, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:29:52,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90773 states. [2021-06-05 06:29:53,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90773 to 46678. [2021-06-05 06:29:53,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46678 states, 46677 states have (on average 4.138933521863016) internal successors, (193193), 46677 states have internal predecessors, (193193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:53,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46678 states to 46678 states and 193193 transitions. [2021-06-05 06:29:53,370 INFO L78 Accepts]: Start accepts. Automaton has 46678 states and 193193 transitions. Word has length 39 [2021-06-05 06:29:53,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:53,370 INFO L482 AbstractCegarLoop]: Abstraction has 46678 states and 193193 transitions. [2021-06-05 06:29:53,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:53,370 INFO L276 IsEmpty]: Start isEmpty. Operand 46678 states and 193193 transitions. [2021-06-05 06:29:53,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:29:53,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:53,450 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:53,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-06-05 06:29:53,651 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:53,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:53,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1820000131, now seen corresponding path program 113 times [2021-06-05 06:29:53,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:53,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604716874] [2021-06-05 06:29:53,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:53,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:53,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604716874] [2021-06-05 06:29:53,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604716874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:53,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457949619] [2021-06-05 06:29:53,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:53,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:29:53,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:53,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:29:53,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:54,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:29:54,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:54,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:54,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:29:54,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:47 [2021-06-05 06:29:54,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:54,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:54,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:54,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:54,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 06:29:54,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:29:54,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:54,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:29:54,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:58, output treesize:28 [2021-06-05 06:29:54,579 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:54,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-06-05 06:29:54,580 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:29:54,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:54,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:29:54,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:13 [2021-06-05 06:29:54,633 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:54,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457949619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:54,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:54,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:29:54,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782557495] [2021-06-05 06:29:54,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:29:54,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:54,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:29:54,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:29:54,634 INFO L87 Difference]: Start difference. First operand 46678 states and 193193 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:58,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:58,294 INFO L93 Difference]: Finished difference Result 106169 states and 432121 transitions. [2021-06-05 06:29:58,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 06:29:58,295 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:29:58,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:58,617 INFO L225 Difference]: With dead ends: 106169 [2021-06-05 06:29:58,617 INFO L226 Difference]: Without dead ends: 105778 [2021-06-05 06:29:58,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 2319.2ms TimeCoverageRelationStatistics Valid=807, Invalid=4449, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 06:29:58,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105778 states. [2021-06-05 06:29:59,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105778 to 46688. [2021-06-05 06:29:59,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46688 states, 46687 states have (on average 4.138646732495127) internal successors, (193221), 46687 states have internal predecessors, (193221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:00,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46688 states to 46688 states and 193221 transitions. [2021-06-05 06:30:00,103 INFO L78 Accepts]: Start accepts. Automaton has 46688 states and 193221 transitions. Word has length 39 [2021-06-05 06:30:00,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:30:00,104 INFO L482 AbstractCegarLoop]: Abstraction has 46688 states and 193221 transitions. [2021-06-05 06:30:00,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:00,104 INFO L276 IsEmpty]: Start isEmpty. Operand 46688 states and 193221 transitions. [2021-06-05 06:30:00,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:30:00,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:30:00,503 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:30:00,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable552,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:00,719 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:30:00,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:30:00,719 INFO L82 PathProgramCache]: Analyzing trace with hash 2023920877, now seen corresponding path program 114 times [2021-06-05 06:30:00,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:30:00,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557615455] [2021-06-05 06:30:00,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:30:00,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:30:00,991 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:00,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:30:00,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557615455] [2021-06-05 06:30:00,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557615455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:00,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651943496] [2021-06-05 06:30:00,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:01,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:30:01,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:30:01,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 06:30:01,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:30:01,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:30:01,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:01,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:01,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:01,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:38 [2021-06-05 06:30:01,251 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:30:01,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 06:30:01,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:01,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:01,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:01,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:9 [2021-06-05 06:30:01,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:01,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:30:01,283 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:30:01,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:01,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:30:01,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 06:30:01,336 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:01,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651943496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:01,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:30:01,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 06:30:01,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748838024] [2021-06-05 06:30:01,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:30:01,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:30:01,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:30:01,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:30:01,337 INFO L87 Difference]: Start difference. First operand 46688 states and 193221 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:03,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:30:03,765 INFO L93 Difference]: Finished difference Result 78548 states and 320447 transitions. [2021-06-05 06:30:03,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:30:03,765 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:30:03,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:30:03,989 INFO L225 Difference]: With dead ends: 78548 [2021-06-05 06:30:03,989 INFO L226 Difference]: Without dead ends: 78384 [2021-06-05 06:30:03,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1549.8ms TimeCoverageRelationStatistics Valid=510, Invalid=2246, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:30:04,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78384 states. [2021-06-05 06:30:05,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78384 to 46792. [2021-06-05 06:30:05,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46792 states, 46791 states have (on average 4.1385950289585605) internal successors, (193649), 46791 states have internal predecessors, (193649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:05,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46792 states to 46792 states and 193649 transitions. [2021-06-05 06:30:05,400 INFO L78 Accepts]: Start accepts. Automaton has 46792 states and 193649 transitions. Word has length 39 [2021-06-05 06:30:05,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:30:05,400 INFO L482 AbstractCegarLoop]: Abstraction has 46792 states and 193649 transitions. [2021-06-05 06:30:05,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:05,400 INFO L276 IsEmpty]: Start isEmpty. Operand 46792 states and 193649 transitions. [2021-06-05 06:30:05,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:30:05,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:30:05,497 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:30:05,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:05,698 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:30:05,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:30:05,698 INFO L82 PathProgramCache]: Analyzing trace with hash 426158953, now seen corresponding path program 115 times [2021-06-05 06:30:05,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:30:05,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837692876] [2021-06-05 06:30:05,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:30:05,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:30:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:05,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:30:05,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837692876] [2021-06-05 06:30:05,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837692876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:05,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998824291] [2021-06-05 06:30:05,990 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:06,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:30:06,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:30:06,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:30:06,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:30:06,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:06,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:06,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:06,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 06:30:06,252 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:30:06,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:30:06,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:06,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:06,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:06,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:30:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:06,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998824291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:06,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:30:06,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:30:06,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161449930] [2021-06-05 06:30:06,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:30:06,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:30:06,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:30:06,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:30:06,295 INFO L87 Difference]: Start difference. First operand 46792 states and 193649 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:08,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:30:08,262 INFO L93 Difference]: Finished difference Result 107329 states and 436087 transitions. [2021-06-05 06:30:08,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:30:08,262 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:30:08,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:30:08,613 INFO L225 Difference]: With dead ends: 107329 [2021-06-05 06:30:08,613 INFO L226 Difference]: Without dead ends: 107209 [2021-06-05 06:30:08,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1013.9ms TimeCoverageRelationStatistics Valid=387, Invalid=1775, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:30:08,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107209 states. [2021-06-05 06:30:10,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107209 to 46488. [2021-06-05 06:30:10,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46488 states, 46487 states have (on average 4.140490889926216) internal successors, (192479), 46487 states have internal predecessors, (192479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:10,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46488 states to 46488 states and 192479 transitions. [2021-06-05 06:30:10,484 INFO L78 Accepts]: Start accepts. Automaton has 46488 states and 192479 transitions. Word has length 39 [2021-06-05 06:30:10,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:30:10,484 INFO L482 AbstractCegarLoop]: Abstraction has 46488 states and 192479 transitions. [2021-06-05 06:30:10,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:10,484 INFO L276 IsEmpty]: Start isEmpty. Operand 46488 states and 192479 transitions. [2021-06-05 06:30:10,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:30:10,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:30:10,566 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:30:10,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-06-05 06:30:10,767 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:30:10,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:30:10,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1314265319, now seen corresponding path program 116 times [2021-06-05 06:30:10,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:30:10,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986368829] [2021-06-05 06:30:10,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:30:10,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:30:11,022 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:11,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:30:11,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986368829] [2021-06-05 06:30:11,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986368829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:11,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451993966] [2021-06-05 06:30:11,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:11,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:30:11,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:30:11,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:30:11,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:30:11,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:30:11,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:11,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:11,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:11,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 06:30:11,250 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:30:11,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 06:30:11,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:11,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:11,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:11,252 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-06-05 06:30:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:11,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451993966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:11,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:30:11,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-06-05 06:30:11,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683254695] [2021-06-05 06:30:11,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:30:11,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:30:11,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:30:11,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:30:11,304 INFO L87 Difference]: Start difference. First operand 46488 states and 192479 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:13,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:30:13,007 INFO L93 Difference]: Finished difference Result 85981 states and 351800 transitions. [2021-06-05 06:30:13,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:30:13,008 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:30:13,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:30:13,274 INFO L225 Difference]: With dead ends: 85981 [2021-06-05 06:30:13,274 INFO L226 Difference]: Without dead ends: 85907 [2021-06-05 06:30:13,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 860.8ms TimeCoverageRelationStatistics Valid=266, Invalid=1540, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:30:13,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85907 states. [2021-06-05 06:30:14,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85907 to 45844. [2021-06-05 06:30:14,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45844 states, 45843 states have (on average 4.14133019217765) internal successors, (189851), 45843 states have internal predecessors, (189851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:14,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45844 states to 45844 states and 189851 transitions. [2021-06-05 06:30:14,644 INFO L78 Accepts]: Start accepts. Automaton has 45844 states and 189851 transitions. Word has length 39 [2021-06-05 06:30:14,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:30:14,644 INFO L482 AbstractCegarLoop]: Abstraction has 45844 states and 189851 transitions. [2021-06-05 06:30:14,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:14,645 INFO L276 IsEmpty]: Start isEmpty. Operand 45844 states and 189851 transitions. [2021-06-05 06:30:14,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:30:14,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:30:14,726 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:30:14,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable563 [2021-06-05 06:30:14,926 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:30:14,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:30:14,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1040958189, now seen corresponding path program 117 times [2021-06-05 06:30:14,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:30:14,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860475967] [2021-06-05 06:30:14,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:30:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:30:15,150 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:15,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:30:15,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860475967] [2021-06-05 06:30:15,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860475967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:15,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313484978] [2021-06-05 06:30:15,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:30:15,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:30:15,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:30:15,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 06:30:15,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:30:15,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:30:15,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:15,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:15,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:15,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:37 [2021-06-05 06:30:15,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:30:15,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:15,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-06-05 06:30:15,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:15,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:15,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:30:15,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:75 [2021-06-05 06:30:15,474 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:15,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:30:15,476 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:30:15,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:15,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:15,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:30:15,502 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:30:15,533 INFO L628 ElimStorePlain]: treesize reduction 10, result has 82.1 percent of original size [2021-06-05 06:30:15,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:30:15,535 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:44 [2021-06-05 06:30:15,615 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:15,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313484978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:15,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:30:15,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:30:15,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112604779] [2021-06-05 06:30:15,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:30:15,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:30:15,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:30:15,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:30:15,616 INFO L87 Difference]: Start difference. First operand 45844 states and 189851 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:16,169 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 15 [2021-06-05 06:30:20,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:30:20,958 INFO L93 Difference]: Finished difference Result 127734 states and 517956 transitions. [2021-06-05 06:30:20,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 06:30:20,958 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:30:20,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:30:21,545 INFO L225 Difference]: With dead ends: 127734 [2021-06-05 06:30:21,545 INFO L226 Difference]: Without dead ends: 127592 [2021-06-05 06:30:21,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3048 ImplicationChecksByTransitivity, 3993.5ms TimeCoverageRelationStatistics Valid=1470, Invalid=7650, Unknown=0, NotChecked=0, Total=9120 [2021-06-05 06:30:21,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127592 states. [2021-06-05 06:30:22,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127592 to 46289. [2021-06-05 06:30:23,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46289 states, 46288 states have (on average 4.144292257172485) internal successors, (191831), 46288 states have internal predecessors, (191831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:23,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46289 states to 46289 states and 191831 transitions. [2021-06-05 06:30:23,196 INFO L78 Accepts]: Start accepts. Automaton has 46289 states and 191831 transitions. Word has length 39 [2021-06-05 06:30:23,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:30:23,196 INFO L482 AbstractCegarLoop]: Abstraction has 46289 states and 191831 transitions. [2021-06-05 06:30:23,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:23,197 INFO L276 IsEmpty]: Start isEmpty. Operand 46289 states and 191831 transitions. [2021-06-05 06:30:23,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:30:23,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:30:23,279 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:30:23,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-06-05 06:30:23,479 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:30:23,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:30:23,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1790054465, now seen corresponding path program 118 times [2021-06-05 06:30:23,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:30:23,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803056027] [2021-06-05 06:30:23,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:30:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:30:23,701 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:23,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:30:23,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803056027] [2021-06-05 06:30:23,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803056027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:23,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808833972] [2021-06-05 06:30:23,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:23,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:30:23,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:30:23,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:30:23,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:30:23,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:30:23,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:23,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:23,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:23,889 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 06:30:23,944 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:30:23,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:30:23,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:23,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:23,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:23,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:30:23,977 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:23,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808833972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:23,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:30:23,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-06-05 06:30:23,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683701277] [2021-06-05 06:30:23,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:30:23,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:30:23,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:30:23,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:30:23,978 INFO L87 Difference]: Start difference. First operand 46289 states and 191831 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:26,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:30:26,005 INFO L93 Difference]: Finished difference Result 102255 states and 417916 transitions. [2021-06-05 06:30:26,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:30:26,005 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:30:26,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:30:26,317 INFO L225 Difference]: With dead ends: 102255 [2021-06-05 06:30:26,317 INFO L226 Difference]: Without dead ends: 102200 [2021-06-05 06:30:26,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 932.9ms TimeCoverageRelationStatistics Valid=344, Invalid=1818, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:30:26,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102200 states. [2021-06-05 06:30:27,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102200 to 45254. [2021-06-05 06:30:27,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45254 states, 45253 states have (on average 4.142067929198064) internal successors, (187441), 45253 states have internal predecessors, (187441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:27,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45254 states to 45254 states and 187441 transitions. [2021-06-05 06:30:27,881 INFO L78 Accepts]: Start accepts. Automaton has 45254 states and 187441 transitions. Word has length 39 [2021-06-05 06:30:27,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:30:27,881 INFO L482 AbstractCegarLoop]: Abstraction has 45254 states and 187441 transitions. [2021-06-05 06:30:27,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:27,881 INFO L276 IsEmpty]: Start isEmpty. Operand 45254 states and 187441 transitions. [2021-06-05 06:30:28,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:30:28,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:30:28,290 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:30:28,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:28,501 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:30:28,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:30:28,501 INFO L82 PathProgramCache]: Analyzing trace with hash -956397167, now seen corresponding path program 119 times [2021-06-05 06:30:28,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:30:28,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564958350] [2021-06-05 06:30:28,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:30:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:30:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:28,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:30:28,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564958350] [2021-06-05 06:30:28,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564958350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:28,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321502220] [2021-06-05 06:30:28,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:28,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:30:28,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:30:28,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 06:30:28,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:30:28,931 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:30:28,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:30:28,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:28,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:28,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:28,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 06:30:28,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 06:30:28,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:28,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:28,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:30:28,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:21 [2021-06-05 06:30:29,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:30:29,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 06:30:29,084 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:30:29,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:29,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:29,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:3 [2021-06-05 06:30:29,103 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:29,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321502220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:29,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:30:29,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:30:29,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470184253] [2021-06-05 06:30:29,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:30:29,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:30:29,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:30:29,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:30:29,104 INFO L87 Difference]: Start difference. First operand 45254 states and 187441 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:31,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:30:31,591 INFO L93 Difference]: Finished difference Result 81723 states and 334647 transitions. [2021-06-05 06:30:31,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:30:31,591 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:30:31,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:30:31,817 INFO L225 Difference]: With dead ends: 81723 [2021-06-05 06:30:31,817 INFO L226 Difference]: Without dead ends: 81668 [2021-06-05 06:30:31,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1271.4ms TimeCoverageRelationStatistics Valid=373, Invalid=2597, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:30:31,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81668 states. [2021-06-05 06:30:32,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81668 to 45794. [2021-06-05 06:30:32,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45794 states, 45793 states have (on average 4.140611010416439) internal successors, (189611), 45793 states have internal predecessors, (189611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:33,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45794 states to 45794 states and 189611 transitions. [2021-06-05 06:30:33,080 INFO L78 Accepts]: Start accepts. Automaton has 45794 states and 189611 transitions. Word has length 39 [2021-06-05 06:30:33,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:30:33,080 INFO L482 AbstractCegarLoop]: Abstraction has 45794 states and 189611 transitions. [2021-06-05 06:30:33,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:33,080 INFO L276 IsEmpty]: Start isEmpty. Operand 45794 states and 189611 transitions. [2021-06-05 06:30:33,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:30:33,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:30:33,162 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:30:33,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:33,363 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:30:33,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:30:33,363 INFO L82 PathProgramCache]: Analyzing trace with hash 978122307, now seen corresponding path program 120 times [2021-06-05 06:30:33,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:30:33,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996162008] [2021-06-05 06:30:33,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:30:33,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:30:33,629 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:33,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:30:33,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996162008] [2021-06-05 06:30:33,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996162008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:33,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676050920] [2021-06-05 06:30:33,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:33,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:30:33,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:30:33,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 06:30:33,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:30:33,822 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:30:33,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:30:33,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:33,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:33,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:33,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:30 [2021-06-05 06:30:33,919 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:33,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 06:30:33,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:33,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:33,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:33,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-06-05 06:30:34,017 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:34,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676050920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:34,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:30:34,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-05 06:30:34,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480732746] [2021-06-05 06:30:34,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 06:30:34,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:30:34,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 06:30:34,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=690, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:30:34,018 INFO L87 Difference]: Start difference. First operand 45794 states and 189611 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:34,582 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-06-05 06:30:36,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:30:36,174 INFO L93 Difference]: Finished difference Result 75508 states and 307916 transitions. [2021-06-05 06:30:36,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:30:36,175 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:30:36,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:30:36,380 INFO L225 Difference]: With dead ends: 75508 [2021-06-05 06:30:36,380 INFO L226 Difference]: Without dead ends: 75418 [2021-06-05 06:30:36,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1289.9ms TimeCoverageRelationStatistics Valid=429, Invalid=1551, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 06:30:36,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75418 states. [2021-06-05 06:30:37,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75418 to 46130. [2021-06-05 06:30:37,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46130 states, 46129 states have (on average 4.137332263868716) internal successors, (190851), 46129 states have internal predecessors, (190851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:37,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46130 states to 46130 states and 190851 transitions. [2021-06-05 06:30:37,639 INFO L78 Accepts]: Start accepts. Automaton has 46130 states and 190851 transitions. Word has length 39 [2021-06-05 06:30:37,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:30:37,639 INFO L482 AbstractCegarLoop]: Abstraction has 46130 states and 190851 transitions. [2021-06-05 06:30:37,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:37,640 INFO L276 IsEmpty]: Start isEmpty. Operand 46130 states and 190851 transitions. [2021-06-05 06:30:37,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:30:37,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:30:37,999 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:30:38,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2021-06-05 06:30:38,213 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:30:38,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:30:38,213 INFO L82 PathProgramCache]: Analyzing trace with hash -703714603, now seen corresponding path program 121 times [2021-06-05 06:30:38,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:30:38,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030348617] [2021-06-05 06:30:38,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:30:38,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:30:38,471 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:38,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:30:38,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030348617] [2021-06-05 06:30:38,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030348617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:38,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661413471] [2021-06-05 06:30:38,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:30:38,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:30:38,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:30:38,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:30:38,668 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:30:38,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:30:38,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:38,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:38,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:38,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 06:30:38,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:30:38,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:38,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:38,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:38,756 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:30:38,791 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:38,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661413471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:38,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:30:38,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:30:38,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587524704] [2021-06-05 06:30:38,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:30:38,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:30:38,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:30:38,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:30:38,792 INFO L87 Difference]: Start difference. First operand 46130 states and 190851 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:40,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:30:40,934 INFO L93 Difference]: Finished difference Result 93119 states and 378680 transitions. [2021-06-05 06:30:40,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:30:40,935 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:30:40,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:30:41,186 INFO L225 Difference]: With dead ends: 93119 [2021-06-05 06:30:41,186 INFO L226 Difference]: Without dead ends: 92863 [2021-06-05 06:30:41,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 1276.9ms TimeCoverageRelationStatistics Valid=524, Invalid=2446, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:30:41,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92863 states. [2021-06-05 06:30:42,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92863 to 45865. [2021-06-05 06:30:42,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45865 states, 45864 states have (on average 4.141156462585034) internal successors, (189930), 45864 states have internal predecessors, (189930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:42,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45865 states to 45865 states and 189930 transitions. [2021-06-05 06:30:42,495 INFO L78 Accepts]: Start accepts. Automaton has 45865 states and 189930 transitions. Word has length 39 [2021-06-05 06:30:42,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:30:42,495 INFO L482 AbstractCegarLoop]: Abstraction has 45865 states and 189930 transitions. [2021-06-05 06:30:42,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:42,495 INFO L276 IsEmpty]: Start isEmpty. Operand 45865 states and 189930 transitions. [2021-06-05 06:30:42,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:30:42,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:30:42,572 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:30:42,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-06-05 06:30:42,773 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:30:42,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:30:42,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1581231163, now seen corresponding path program 122 times [2021-06-05 06:30:42,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:30:42,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961075799] [2021-06-05 06:30:42,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:30:42,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:30:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:43,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:30:43,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961075799] [2021-06-05 06:30:43,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961075799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:43,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887967137] [2021-06-05 06:30:43,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:43,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:30:43,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:30:43,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:30:43,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:30:43,219 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:30:43,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:30:43,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:43,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:43,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:43,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 06:30:43,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:30:43,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:43,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:43,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:43,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:30:43,346 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:43,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887967137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:43,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:30:43,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:30:43,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600214342] [2021-06-05 06:30:43,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:30:43,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:30:43,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:30:43,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:30:43,347 INFO L87 Difference]: Start difference. First operand 45865 states and 189930 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:43,991 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-06-05 06:30:45,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:30:45,075 INFO L93 Difference]: Finished difference Result 77133 states and 315782 transitions. [2021-06-05 06:30:45,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:30:45,075 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:30:45,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:30:45,289 INFO L225 Difference]: With dead ends: 77133 [2021-06-05 06:30:45,289 INFO L226 Difference]: Without dead ends: 76941 [2021-06-05 06:30:45,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1234.0ms TimeCoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:30:45,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76941 states. [2021-06-05 06:30:46,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76941 to 45865. [2021-06-05 06:30:46,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45865 states, 45864 states have (on average 4.141156462585034) internal successors, (189930), 45864 states have internal predecessors, (189930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:46,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45865 states to 45865 states and 189930 transitions. [2021-06-05 06:30:46,542 INFO L78 Accepts]: Start accepts. Automaton has 45865 states and 189930 transitions. Word has length 39 [2021-06-05 06:30:46,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:30:46,542 INFO L482 AbstractCegarLoop]: Abstraction has 45865 states and 189930 transitions. [2021-06-05 06:30:46,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:46,543 INFO L276 IsEmpty]: Start isEmpty. Operand 45865 states and 189930 transitions. [2021-06-05 06:30:46,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:30:46,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:30:46,621 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:30:46,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-06-05 06:30:46,822 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:30:46,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:30:46,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1486083717, now seen corresponding path program 123 times [2021-06-05 06:30:46,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:30:46,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725982910] [2021-06-05 06:30:46,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:30:46,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:30:47,309 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:47,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:30:47,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725982910] [2021-06-05 06:30:47,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725982910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:47,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353662935] [2021-06-05 06:30:47,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:47,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:30:47,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:30:47,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 06:30:47,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:30:47,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:30:47,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:47,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-06-05 06:30:47,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:47,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:47,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:30:47,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:60 [2021-06-05 06:30:47,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:30:47,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:30:47,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 06:30:47,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:47,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:47,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:47,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:18 [2021-06-05 06:30:47,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:47,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:30:47,812 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:30:47,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:47,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:30:47,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 06:30:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:47,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353662935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:47,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:30:47,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 06:30:47,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323291419] [2021-06-05 06:30:47,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 06:30:47,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:30:47,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 06:30:47,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:30:47,856 INFO L87 Difference]: Start difference. First operand 45865 states and 189930 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:51,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:30:51,090 INFO L93 Difference]: Finished difference Result 85055 states and 348299 transitions. [2021-06-05 06:30:51,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 06:30:51,090 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:30:51,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:30:51,322 INFO L225 Difference]: With dead ends: 85055 [2021-06-05 06:30:51,322 INFO L226 Difference]: Without dead ends: 85004 [2021-06-05 06:30:51,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1397 ImplicationChecksByTransitivity, 2230.6ms TimeCoverageRelationStatistics Valid=602, Invalid=4228, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 06:30:51,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85004 states. [2021-06-05 06:30:52,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85004 to 46158. [2021-06-05 06:30:52,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46158 states, 46157 states have (on average 4.139697120696752) internal successors, (191076), 46157 states have internal predecessors, (191076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:52,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46158 states to 46158 states and 191076 transitions. [2021-06-05 06:30:52,537 INFO L78 Accepts]: Start accepts. Automaton has 46158 states and 191076 transitions. Word has length 39 [2021-06-05 06:30:52,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:30:52,537 INFO L482 AbstractCegarLoop]: Abstraction has 46158 states and 191076 transitions. [2021-06-05 06:30:52,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:52,537 INFO L276 IsEmpty]: Start isEmpty. Operand 46158 states and 191076 transitions. [2021-06-05 06:30:52,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:30:52,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:30:52,621 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:30:52,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:52,821 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:30:52,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:30:52,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1991827753, now seen corresponding path program 124 times [2021-06-05 06:30:52,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:30:52,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744123655] [2021-06-05 06:30:52,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:30:52,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:30:53,083 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:53,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:30:53,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744123655] [2021-06-05 06:30:53,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744123655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:53,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261245933] [2021-06-05 06:30:53,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:53,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:30:53,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:30:53,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:30:53,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:30:53,272 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:30:53,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:30:53,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:53,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:53,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:53,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 06:30:53,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:30:53,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:53,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:53,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:53,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:30:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:53,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261245933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:53,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:30:53,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:30:53,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124238495] [2021-06-05 06:30:53,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:30:53,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:30:53,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:30:53,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:30:53,370 INFO L87 Difference]: Start difference. First operand 46158 states and 191076 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:55,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:30:55,161 INFO L93 Difference]: Finished difference Result 78941 states and 322728 transitions. [2021-06-05 06:30:55,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:30:55,161 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:30:55,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:30:55,388 INFO L225 Difference]: With dead ends: 78941 [2021-06-05 06:30:55,388 INFO L226 Difference]: Without dead ends: 78725 [2021-06-05 06:30:55,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 1084.2ms TimeCoverageRelationStatistics Valid=415, Invalid=1841, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:30:55,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78725 states. [2021-06-05 06:30:56,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78725 to 46162. [2021-06-05 06:30:56,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46162 states, 46161 states have (on average 4.13925174931219) internal successors, (191072), 46161 states have internal predecessors, (191072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:56,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46162 states to 46162 states and 191072 transitions. [2021-06-05 06:30:56,909 INFO L78 Accepts]: Start accepts. Automaton has 46162 states and 191072 transitions. Word has length 39 [2021-06-05 06:30:56,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:30:56,909 INFO L482 AbstractCegarLoop]: Abstraction has 46162 states and 191072 transitions. [2021-06-05 06:30:56,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:56,910 INFO L276 IsEmpty]: Start isEmpty. Operand 46162 states and 191072 transitions. [2021-06-05 06:30:57,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:30:57,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:30:57,027 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:30:57,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2021-06-05 06:30:57,228 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:30:57,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:30:57,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1651652727, now seen corresponding path program 125 times [2021-06-05 06:30:57,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:30:57,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174832922] [2021-06-05 06:30:57,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:30:57,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:30:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:57,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:30:57,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174832922] [2021-06-05 06:30:57,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174832922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:57,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205931695] [2021-06-05 06:30:57,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:57,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:30:57,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:30:57,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 06:30:57,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:30:57,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:30:57,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:57,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:57,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:30:57,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-06-05 06:30:57,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:30:57,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:30:57,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 06:30:57,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:57,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:57,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:30:57,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:53, output treesize:21 [2021-06-05 06:30:57,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:30:57,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 06:30:57,891 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:30:57,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:57,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:57,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:3 [2021-06-05 06:30:57,909 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:57,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205931695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:57,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:30:57,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:30:57,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528200490] [2021-06-05 06:30:57,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:30:57,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:30:57,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:30:57,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:30:57,909 INFO L87 Difference]: Start difference. First operand 46162 states and 191072 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:59,803 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-06-05 06:31:00,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:00,577 INFO L93 Difference]: Finished difference Result 81524 states and 333283 transitions. [2021-06-05 06:31:00,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 06:31:00,578 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:31:00,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:00,806 INFO L225 Difference]: With dead ends: 81524 [2021-06-05 06:31:00,806 INFO L226 Difference]: Without dead ends: 81469 [2021-06-05 06:31:00,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 1623.0ms TimeCoverageRelationStatistics Valid=442, Invalid=3218, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 06:31:00,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81469 states. [2021-06-05 06:31:01,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81469 to 46478. [2021-06-05 06:31:01,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46478 states, 46477 states have (on average 4.138821352496934) internal successors, (192360), 46477 states have internal predecessors, (192360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:02,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46478 states to 46478 states and 192360 transitions. [2021-06-05 06:31:02,030 INFO L78 Accepts]: Start accepts. Automaton has 46478 states and 192360 transitions. Word has length 39 [2021-06-05 06:31:02,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:02,030 INFO L482 AbstractCegarLoop]: Abstraction has 46478 states and 192360 transitions. [2021-06-05 06:31:02,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:02,030 INFO L276 IsEmpty]: Start isEmpty. Operand 46478 states and 192360 transitions. [2021-06-05 06:31:02,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:31:02,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:02,107 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:02,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-06-05 06:31:02,308 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:02,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:02,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1014064697, now seen corresponding path program 126 times [2021-06-05 06:31:02,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:02,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111219559] [2021-06-05 06:31:02,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:02,540 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:02,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:02,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111219559] [2021-06-05 06:31:02,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111219559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:02,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52402928] [2021-06-05 06:31:02,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:02,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:31:02,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:31:02,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 06:31:02,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:02,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:31:02,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:02,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:02,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:02,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:37 [2021-06-05 06:31:02,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:02,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:02,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-06-05 06:31:02,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:02,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:02,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:31:02,826 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:75 [2021-06-05 06:31:02,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:02,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:31:02,881 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:31:02,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:02,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:31:02,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 06:31:02,922 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:02,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52402928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:02,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:02,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:31:02,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084464325] [2021-06-05 06:31:02,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:31:02,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:02,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:31:02,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:31:02,923 INFO L87 Difference]: Start difference. First operand 46478 states and 192360 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:06,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:06,248 INFO L93 Difference]: Finished difference Result 99154 states and 406724 transitions. [2021-06-05 06:31:06,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:31:06,248 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:31:06,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:06,546 INFO L225 Difference]: With dead ends: 99154 [2021-06-05 06:31:06,546 INFO L226 Difference]: Without dead ends: 99099 [2021-06-05 06:31:06,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 1755.5ms TimeCoverageRelationStatistics Valid=664, Invalid=4306, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 06:31:06,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99099 states. [2021-06-05 06:31:07,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99099 to 46886. [2021-06-05 06:31:07,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46886 states, 46885 states have (on average 4.139148981550602) internal successors, (194064), 46885 states have internal predecessors, (194064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:07,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46886 states to 46886 states and 194064 transitions. [2021-06-05 06:31:07,916 INFO L78 Accepts]: Start accepts. Automaton has 46886 states and 194064 transitions. Word has length 39 [2021-06-05 06:31:07,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:07,916 INFO L482 AbstractCegarLoop]: Abstraction has 46886 states and 194064 transitions. [2021-06-05 06:31:07,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:07,917 INFO L276 IsEmpty]: Start isEmpty. Operand 46886 states and 194064 transitions. [2021-06-05 06:31:07,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:31:07,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:07,996 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:08,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-06-05 06:31:08,197 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:08,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:08,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1861909575, now seen corresponding path program 127 times [2021-06-05 06:31:08,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:08,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002826345] [2021-06-05 06:31:08,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:08,428 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:08,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:08,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002826345] [2021-06-05 06:31:08,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002826345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:08,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918144168] [2021-06-05 06:31:08,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:08,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:08,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:31:08,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:08,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:31:08,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:08,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:08,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:08,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 06:31:08,687 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:31:08,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:31:08,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:08,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:08,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:08,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:31:08,717 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:08,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918144168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:08,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:08,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-06-05 06:31:08,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126780725] [2021-06-05 06:31:08,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:31:08,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:08,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:31:08,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:31:08,718 INFO L87 Difference]: Start difference. First operand 46886 states and 194064 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:10,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:10,713 INFO L93 Difference]: Finished difference Result 95481 states and 393315 transitions. [2021-06-05 06:31:10,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:31:10,713 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:31:10,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:10,979 INFO L225 Difference]: With dead ends: 95481 [2021-06-05 06:31:10,979 INFO L226 Difference]: Without dead ends: 95426 [2021-06-05 06:31:10,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 815.7ms TimeCoverageRelationStatistics Valid=252, Invalid=1640, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:31:11,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95426 states. [2021-06-05 06:31:12,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95426 to 46810. [2021-06-05 06:31:12,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46810 states, 46809 states have (on average 4.143049413574313) internal successors, (193932), 46809 states have internal predecessors, (193932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:12,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46810 states to 46810 states and 193932 transitions. [2021-06-05 06:31:12,645 INFO L78 Accepts]: Start accepts. Automaton has 46810 states and 193932 transitions. Word has length 39 [2021-06-05 06:31:12,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:12,645 INFO L482 AbstractCegarLoop]: Abstraction has 46810 states and 193932 transitions. [2021-06-05 06:31:12,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:12,645 INFO L276 IsEmpty]: Start isEmpty. Operand 46810 states and 193932 transitions. [2021-06-05 06:31:12,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:31:12,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:12,726 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:12,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:12,926 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:12,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:12,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1623254579, now seen corresponding path program 128 times [2021-06-05 06:31:12,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:12,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645272797] [2021-06-05 06:31:12,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:13,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:13,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645272797] [2021-06-05 06:31:13,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645272797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:13,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435170842] [2021-06-05 06:31:13,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:13,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:31:13,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:31:13,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:31:13,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:13,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:31:13,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:13,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:13,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:13,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 06:31:13,421 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:31:13,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:31:13,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:13,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:13,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:13,423 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:31:13,461 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:13,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435170842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:13,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:13,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:31:13,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979037129] [2021-06-05 06:31:13,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:31:13,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:13,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:31:13,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:31:13,461 INFO L87 Difference]: Start difference. First operand 46810 states and 193932 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:15,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:15,943 INFO L93 Difference]: Finished difference Result 129806 states and 527003 transitions. [2021-06-05 06:31:15,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:31:15,943 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:31:15,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:16,334 INFO L225 Difference]: With dead ends: 129806 [2021-06-05 06:31:16,335 INFO L226 Difference]: Without dead ends: 129751 [2021-06-05 06:31:16,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1322.9ms TimeCoverageRelationStatistics Valid=510, Invalid=2246, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:31:16,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129751 states. [2021-06-05 06:31:18,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129751 to 46352. [2021-06-05 06:31:18,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46352 states, 46351 states have (on average 4.140018554076503) internal successors, (191894), 46351 states have internal predecessors, (191894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:18,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46352 states to 46352 states and 191894 transitions. [2021-06-05 06:31:18,329 INFO L78 Accepts]: Start accepts. Automaton has 46352 states and 191894 transitions. Word has length 39 [2021-06-05 06:31:18,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:18,329 INFO L482 AbstractCegarLoop]: Abstraction has 46352 states and 191894 transitions. [2021-06-05 06:31:18,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:18,329 INFO L276 IsEmpty]: Start isEmpty. Operand 46352 states and 191894 transitions. [2021-06-05 06:31:18,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:31:18,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:18,414 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:18,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:18,614 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:18,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:18,614 INFO L82 PathProgramCache]: Analyzing trace with hash -384895263, now seen corresponding path program 129 times [2021-06-05 06:31:18,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:18,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219182670] [2021-06-05 06:31:18,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:18,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:18,903 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:18,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:18,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219182670] [2021-06-05 06:31:18,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219182670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:18,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705748653] [2021-06-05 06:31:18,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:18,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:31:18,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:31:18,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 06:31:18,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:19,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:19,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:19,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-06-05 06:31:19,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:19,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:19,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:19,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:109 [2021-06-05 06:31:19,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:19,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-06-05 06:31:19,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:19,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:19,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:19,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:40 [2021-06-05 06:31:19,403 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:19,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:31:19,404 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:31:19,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:19,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 06:31:19,408 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:19,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:31:19,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:19,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 9 [2021-06-05 06:31:19,412 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:19,462 INFO L628 ElimStorePlain]: treesize reduction 29, result has 68.5 percent of original size [2021-06-05 06:31:19,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:31:19,463 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:123, output treesize:54 [2021-06-05 06:31:19,611 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:19,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705748653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:19,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:19,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-06-05 06:31:19,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421899545] [2021-06-05 06:31:19,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 06:31:19,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:19,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 06:31:19,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:31:19,612 INFO L87 Difference]: Start difference. First operand 46352 states and 191894 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:20,582 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2021-06-05 06:31:23,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:23,423 INFO L93 Difference]: Finished difference Result 76820 states and 311410 transitions. [2021-06-05 06:31:23,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 06:31:23,423 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:31:23,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:23,631 INFO L225 Difference]: With dead ends: 76820 [2021-06-05 06:31:23,632 INFO L226 Difference]: Without dead ends: 76627 [2021-06-05 06:31:23,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 2876.4ms TimeCoverageRelationStatistics Valid=746, Invalid=4366, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 06:31:23,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76627 states. [2021-06-05 06:31:24,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76627 to 47037. [2021-06-05 06:31:24,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47037 states, 47036 states have (on average 4.1322178756697) internal successors, (194363), 47036 states have internal predecessors, (194363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:24,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47037 states to 47037 states and 194363 transitions. [2021-06-05 06:31:24,848 INFO L78 Accepts]: Start accepts. Automaton has 47037 states and 194363 transitions. Word has length 39 [2021-06-05 06:31:24,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:24,848 INFO L482 AbstractCegarLoop]: Abstraction has 47037 states and 194363 transitions. [2021-06-05 06:31:24,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:24,848 INFO L276 IsEmpty]: Start isEmpty. Operand 47037 states and 194363 transitions. [2021-06-05 06:31:24,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:31:24,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:24,929 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:25,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable594 [2021-06-05 06:31:25,130 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:25,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:25,130 INFO L82 PathProgramCache]: Analyzing trace with hash -2066732173, now seen corresponding path program 130 times [2021-06-05 06:31:25,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:25,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815900413] [2021-06-05 06:31:25,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:25,406 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:25,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:25,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815900413] [2021-06-05 06:31:25,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815900413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:25,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224700868] [2021-06-05 06:31:25,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:25,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:31:25,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:31:25,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:31:25,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:25,627 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:31:25,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:31:25,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:25,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:25,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:25,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 06:31:25,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:31:25,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:25,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:25,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:25,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:31:25,699 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:25,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224700868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:25,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:25,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:31:25,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401840027] [2021-06-05 06:31:25,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:31:25,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:25,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:31:25,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:31:25,700 INFO L87 Difference]: Start difference. First operand 47037 states and 194363 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:27,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:27,646 INFO L93 Difference]: Finished difference Result 95645 states and 388180 transitions. [2021-06-05 06:31:27,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 06:31:27,646 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:31:27,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:27,907 INFO L225 Difference]: With dead ends: 95645 [2021-06-05 06:31:27,907 INFO L226 Difference]: Without dead ends: 95325 [2021-06-05 06:31:27,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1179.5ms TimeCoverageRelationStatistics Valid=472, Invalid=2180, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 06:31:28,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95325 states. [2021-06-05 06:31:29,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95325 to 47083. [2021-06-05 06:31:29,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47083 states, 47082 states have (on average 4.131472749670787) internal successors, (194518), 47082 states have internal predecessors, (194518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:29,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47083 states to 47083 states and 194518 transitions. [2021-06-05 06:31:29,301 INFO L78 Accepts]: Start accepts. Automaton has 47083 states and 194518 transitions. Word has length 39 [2021-06-05 06:31:29,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:29,301 INFO L482 AbstractCegarLoop]: Abstraction has 47083 states and 194518 transitions. [2021-06-05 06:31:29,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:29,301 INFO L276 IsEmpty]: Start isEmpty. Operand 47083 states and 194518 transitions. [2021-06-05 06:31:29,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:31:29,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:29,382 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forcibly destroying the process [2021-06-05 06:31:29,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:29,650 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:29,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:29,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1632190789, now seen corresponding path program 131 times [2021-06-05 06:31:29,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:29,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312305498] [2021-06-05 06:31:29,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] The stream was forcibly closed: stdIn [2021-06-05 06:31:29,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:29,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:29,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312305498] [2021-06-05 06:31:29,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312305498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:29,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637331873] [2021-06-05 06:31:29,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:29,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:31:29,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:31:29,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 06:31:29,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:30,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:31:30,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:30,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:30,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:30,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:44 [2021-06-05 06:31:30,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:30,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:30,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:31:30,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:31:30,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:31:30,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:30,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:30,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:30,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:7 [2021-06-05 06:31:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:30,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637331873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:30,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:30,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:31:30,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884253128] [2021-06-05 06:31:30,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:31:30,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:30,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:31:30,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:31:30,308 INFO L87 Difference]: Start difference. First operand 47083 states and 194518 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:33,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:33,601 INFO L93 Difference]: Finished difference Result 97644 states and 396791 transitions. [2021-06-05 06:31:33,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 06:31:33,601 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:31:33,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:33,875 INFO L225 Difference]: With dead ends: 97644 [2021-06-05 06:31:33,875 INFO L226 Difference]: Without dead ends: 97436 [2021-06-05 06:31:33,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 2166.3ms TimeCoverageRelationStatistics Valid=597, Invalid=3693, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 06:31:33,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97436 states. [2021-06-05 06:31:35,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97436 to 47121. [2021-06-05 06:31:35,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47121 states, 47120 states have (on average 4.131748726655348) internal successors, (194688), 47120 states have internal predecessors, (194688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:35,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47121 states to 47121 states and 194688 transitions. [2021-06-05 06:31:35,225 INFO L78 Accepts]: Start accepts. Automaton has 47121 states and 194688 transitions. Word has length 39 [2021-06-05 06:31:35,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:35,225 INFO L482 AbstractCegarLoop]: Abstraction has 47121 states and 194688 transitions. [2021-06-05 06:31:35,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:35,225 INFO L276 IsEmpty]: Start isEmpty. Operand 47121 states and 194688 transitions. [2021-06-05 06:31:35,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:31:35,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:35,305 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:35,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:35,505 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:35,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:35,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1836111535, now seen corresponding path program 132 times [2021-06-05 06:31:35,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:35,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557202241] [2021-06-05 06:31:35,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:35,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:35,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557202241] [2021-06-05 06:31:35,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557202241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:35,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160106203] [2021-06-05 06:31:35,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:36,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:31:36,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:31:36,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 06:31:36,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:36,309 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:36,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 06:31:36,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:36,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:36,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:36,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:73 [2021-06-05 06:31:36,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:36,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 06:31:36,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:36,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:36,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 06:31:36,398 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:36,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:36,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 06:31:36,403 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:36,407 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:31:36,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 38 [2021-06-05 06:31:36,408 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:36,458 INFO L628 ElimStorePlain]: treesize reduction 35, result has 69.6 percent of original size [2021-06-05 06:31:36,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:31:36,459 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:237, output treesize:80 [2021-06-05 06:31:36,512 INFO L446 ElimStorePlain]: Different costs {0=[q1], 1=[v_prenex_108]} [2021-06-05 06:31:36,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 5 [2021-06-05 06:31:36,515 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:36,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:36,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:36,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 5 [2021-06-05 06:31:36,542 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:36,572 INFO L628 ElimStorePlain]: treesize reduction 25, result has 59.0 percent of original size [2021-06-05 06:31:36,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:31:36,572 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:82, output treesize:34 [2021-06-05 06:31:36,705 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:36,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160106203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:36,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:36,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-06-05 06:31:36,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465215480] [2021-06-05 06:31:36,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:31:36,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:36,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:31:36,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:31:36,706 INFO L87 Difference]: Start difference. First operand 47121 states and 194688 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:38,431 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-06-05 06:31:39,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:39,410 INFO L93 Difference]: Finished difference Result 75233 states and 305575 transitions. [2021-06-05 06:31:39,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 06:31:39,410 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:31:39,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:39,618 INFO L225 Difference]: With dead ends: 75233 [2021-06-05 06:31:39,618 INFO L226 Difference]: Without dead ends: 75073 [2021-06-05 06:31:39,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 2035.3ms TimeCoverageRelationStatistics Valid=594, Invalid=2946, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:31:39,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75073 states. [2021-06-05 06:31:40,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75073 to 47227. [2021-06-05 06:31:40,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47227 states, 47226 states have (on average 4.130648371659679) internal successors, (195074), 47226 states have internal predecessors, (195074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:40,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47227 states to 47227 states and 195074 transitions. [2021-06-05 06:31:40,751 INFO L78 Accepts]: Start accepts. Automaton has 47227 states and 195074 transitions. Word has length 39 [2021-06-05 06:31:40,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:40,751 INFO L482 AbstractCegarLoop]: Abstraction has 47227 states and 195074 transitions. [2021-06-05 06:31:40,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:40,751 INFO L276 IsEmpty]: Start isEmpty. Operand 47227 states and 195074 transitions. [2021-06-05 06:31:40,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:31:40,832 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:40,832 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:41,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:41,032 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:41,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:41,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1358284677, now seen corresponding path program 133 times [2021-06-05 06:31:41,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:41,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589730002] [2021-06-05 06:31:41,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:41,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:41,292 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:41,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:41,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589730002] [2021-06-05 06:31:41,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589730002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:41,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392390145] [2021-06-05 06:31:41,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:41,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:41,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:31:41,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:41,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:31:41,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:41,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:41,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:41,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 06:31:41,554 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:31:41,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:31:41,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:41,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:41,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:41,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:31:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:41,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392390145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:41,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:41,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:31:41,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453876135] [2021-06-05 06:31:41,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:31:41,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:41,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:31:41,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:31:41,594 INFO L87 Difference]: Start difference. First operand 47227 states and 195074 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:43,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:43,633 INFO L93 Difference]: Finished difference Result 97814 states and 398030 transitions. [2021-06-05 06:31:43,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:31:43,633 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:31:43,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:44,168 INFO L225 Difference]: With dead ends: 97814 [2021-06-05 06:31:44,169 INFO L226 Difference]: Without dead ends: 97724 [2021-06-05 06:31:44,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1151.5ms TimeCoverageRelationStatistics Valid=447, Invalid=2205, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 06:31:44,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97724 states. [2021-06-05 06:31:45,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97724 to 47123. [2021-06-05 06:31:45,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47123 states, 47122 states have (on average 4.131828020881966) internal successors, (194700), 47122 states have internal predecessors, (194700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:45,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47123 states to 47123 states and 194700 transitions. [2021-06-05 06:31:45,530 INFO L78 Accepts]: Start accepts. Automaton has 47123 states and 194700 transitions. Word has length 39 [2021-06-05 06:31:45,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:45,530 INFO L482 AbstractCegarLoop]: Abstraction has 47123 states and 194700 transitions. [2021-06-05 06:31:45,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:45,530 INFO L276 IsEmpty]: Start isEmpty. Operand 47123 states and 194700 transitions. [2021-06-05 06:31:45,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:31:45,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:45,613 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:45,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable617,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:45,813 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:45,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:45,814 INFO L82 PathProgramCache]: Analyzing trace with hash 731015265, now seen corresponding path program 134 times [2021-06-05 06:31:45,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:45,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841534505] [2021-06-05 06:31:45,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:45,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:46,083 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:46,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:46,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841534505] [2021-06-05 06:31:46,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841534505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:46,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515386452] [2021-06-05 06:31:46,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:46,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:31:46,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:31:46,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:31:46,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:46,288 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:31:46,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:31:46,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:46,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:46,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:46,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 06:31:46,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:31:46,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:46,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:46,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:46,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:31:46,386 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:46,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515386452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:46,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:46,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:31:46,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045801092] [2021-06-05 06:31:46,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:31:46,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:46,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:31:46,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:31:46,387 INFO L87 Difference]: Start difference. First operand 47123 states and 194700 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:48,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:48,120 INFO L93 Difference]: Finished difference Result 79327 states and 324282 transitions. [2021-06-05 06:31:48,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:31:48,121 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:31:48,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:48,348 INFO L225 Difference]: With dead ends: 79327 [2021-06-05 06:31:48,348 INFO L226 Difference]: Without dead ends: 79135 [2021-06-05 06:31:48,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 991.8ms TimeCoverageRelationStatistics Valid=347, Invalid=1545, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:31:48,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79135 states. [2021-06-05 06:31:49,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79135 to 47147. [2021-06-05 06:31:49,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47147 states, 47146 states have (on average 4.131506384422857) internal successors, (194784), 47146 states have internal predecessors, (194784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:49,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47147 states to 47147 states and 194784 transitions. [2021-06-05 06:31:49,621 INFO L78 Accepts]: Start accepts. Automaton has 47147 states and 194784 transitions. Word has length 39 [2021-06-05 06:31:49,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:49,622 INFO L482 AbstractCegarLoop]: Abstraction has 47147 states and 194784 transitions. [2021-06-05 06:31:49,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:49,622 INFO L276 IsEmpty]: Start isEmpty. Operand 47147 states and 194784 transitions. [2021-06-05 06:31:49,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:31:49,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:49,701 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:49,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:49,902 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:49,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:49,902 INFO L82 PathProgramCache]: Analyzing trace with hash -971345865, now seen corresponding path program 135 times [2021-06-05 06:31:49,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:49,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123788111] [2021-06-05 06:31:49,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:49,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:50,183 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:50,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:50,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123788111] [2021-06-05 06:31:50,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123788111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:50,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793275624] [2021-06-05 06:31:50,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:50,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:31:50,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:31:50,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 06:31:50,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:50,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:50,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:50,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 39 [2021-06-05 06:31:50,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:50,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:50,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:50,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:55 [2021-06-05 06:31:50,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:50,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 41 [2021-06-05 06:31:50,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:50,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:50,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:50,625 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2021-06-05 06:31:50,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:50,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:31:50,927 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:31:50,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:50,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:31:50,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:47 [2021-06-05 06:31:51,123 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:51,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793275624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:51,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:51,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-06-05 06:31:51,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194944060] [2021-06-05 06:31:51,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 06:31:51,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:51,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 06:31:51,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:31:51,124 INFO L87 Difference]: Start difference. First operand 47147 states and 194784 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:53,912 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-06-05 06:31:55,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:55,814 INFO L93 Difference]: Finished difference Result 82997 states and 336293 transitions. [2021-06-05 06:31:55,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 06:31:55,815 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:31:55,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:56,037 INFO L225 Difference]: With dead ends: 82997 [2021-06-05 06:31:56,037 INFO L226 Difference]: Without dead ends: 82822 [2021-06-05 06:31:56,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2176 ImplicationChecksByTransitivity, 3899.3ms TimeCoverageRelationStatistics Valid=973, Invalid=6167, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 06:31:56,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82822 states. [2021-06-05 06:31:57,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82822 to 47423. [2021-06-05 06:31:57,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47423 states, 47422 states have (on average 4.128990763780524) internal successors, (195805), 47422 states have internal predecessors, (195805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:57,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47423 states to 47423 states and 195805 transitions. [2021-06-05 06:31:57,532 INFO L78 Accepts]: Start accepts. Automaton has 47423 states and 195805 transitions. Word has length 39 [2021-06-05 06:31:57,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:57,533 INFO L482 AbstractCegarLoop]: Abstraction has 47423 states and 195805 transitions. [2021-06-05 06:31:57,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:57,533 INFO L276 IsEmpty]: Start isEmpty. Operand 47423 states and 195805 transitions. [2021-06-05 06:31:57,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:31:57,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:57,622 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:57,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:57,823 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:57,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:57,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1641784521, now seen corresponding path program 136 times [2021-06-05 06:31:57,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:57,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027723597] [2021-06-05 06:31:57,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:58,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:58,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027723597] [2021-06-05 06:31:58,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027723597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:58,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748974948] [2021-06-05 06:31:58,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:58,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:31:58,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:31:58,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:31:58,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:58,352 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:31:58,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:31:58,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:58,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:58,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:58,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 06:31:58,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:31:58,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:58,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:58,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:58,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:31:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:58,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748974948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:58,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:58,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:31:58,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741071508] [2021-06-05 06:31:58,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:31:58,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:58,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:31:58,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:31:58,424 INFO L87 Difference]: Start difference. First operand 47423 states and 195805 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:00,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:00,564 INFO L93 Difference]: Finished difference Result 95731 states and 388516 transitions. [2021-06-05 06:32:00,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:32:00,564 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:32:00,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:00,828 INFO L225 Difference]: With dead ends: 95731 [2021-06-05 06:32:00,828 INFO L226 Difference]: Without dead ends: 95411 [2021-06-05 06:32:00,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1134.1ms TimeCoverageRelationStatistics Valid=444, Invalid=2006, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:32:00,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95411 states. [2021-06-05 06:32:02,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95411 to 47469. [2021-06-05 06:32:02,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47469 states, 47468 states have (on average 4.128128423358895) internal successors, (195954), 47468 states have internal predecessors, (195954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:02,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47469 states to 47469 states and 195954 transitions. [2021-06-05 06:32:02,237 INFO L78 Accepts]: Start accepts. Automaton has 47469 states and 195954 transitions. Word has length 39 [2021-06-05 06:32:02,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:02,237 INFO L482 AbstractCegarLoop]: Abstraction has 47469 states and 195954 transitions. [2021-06-05 06:32:02,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:02,237 INFO L276 IsEmpty]: Start isEmpty. Operand 47469 states and 195954 transitions. [2021-06-05 06:32:02,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:32:02,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:02,317 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:02,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable633 [2021-06-05 06:32:02,517 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:02,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:02,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1295046579, now seen corresponding path program 137 times [2021-06-05 06:32:02,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:02,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096144649] [2021-06-05 06:32:02,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:02,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:02,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:02,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096144649] [2021-06-05 06:32:02,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096144649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:02,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943346730] [2021-06-05 06:32:02,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:02,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:32:02,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:32:02,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 06:32:02,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:03,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:32:03,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:03,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:03,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:03,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:44 [2021-06-05 06:32:03,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:32:03,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:03,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:32:03,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:03,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:03,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:03,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:7 [2021-06-05 06:32:03,392 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:03,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943346730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:03,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:03,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:32:03,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931940262] [2021-06-05 06:32:03,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:32:03,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:03,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:32:03,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:32:03,393 INFO L87 Difference]: Start difference. First operand 47469 states and 195954 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:05,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:05,826 INFO L93 Difference]: Finished difference Result 97336 states and 395363 transitions. [2021-06-05 06:32:05,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:32:05,826 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:32:05,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:06,104 INFO L225 Difference]: With dead ends: 97336 [2021-06-05 06:32:06,104 INFO L226 Difference]: Without dead ends: 97160 [2021-06-05 06:32:06,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1419.4ms TimeCoverageRelationStatistics Valid=536, Invalid=2544, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 06:32:06,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97160 states. [2021-06-05 06:32:07,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97160 to 47507. [2021-06-05 06:32:07,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47507 states, 47506 states have (on average 4.128362733128447) internal successors, (196122), 47506 states have internal predecessors, (196122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:07,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47507 states to 47507 states and 196122 transitions. [2021-06-05 06:32:07,476 INFO L78 Accepts]: Start accepts. Automaton has 47507 states and 196122 transitions. Word has length 39 [2021-06-05 06:32:07,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:07,476 INFO L482 AbstractCegarLoop]: Abstraction has 47507 states and 196122 transitions. [2021-06-05 06:32:07,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:07,477 INFO L276 IsEmpty]: Start isEmpty. Operand 47507 states and 196122 transitions. [2021-06-05 06:32:07,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:32:07,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:07,561 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:07,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable634,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:07,761 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:07,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:07,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1091125833, now seen corresponding path program 138 times [2021-06-05 06:32:07,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:07,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962986175] [2021-06-05 06:32:07,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:07,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:08,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:08,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962986175] [2021-06-05 06:32:08,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962986175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:08,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062289605] [2021-06-05 06:32:08,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:08,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:32:08,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:32:08,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 06:32:08,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:08,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:08,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 06:32:08,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:08,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:08,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:08,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:71 [2021-06-05 06:32:08,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:08,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 06:32:08,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:32:08,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:08,421 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:08,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-06-05 06:32:08,422 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:08,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:08,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:08,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 50 [2021-06-05 06:32:08,437 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:08,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:08,449 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:08,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 06:32:08,450 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:08,536 INFO L628 ElimStorePlain]: treesize reduction 63, result has 71.4 percent of original size [2021-06-05 06:32:08,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:32:08,546 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:249, output treesize:119 [2021-06-05 06:32:08,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:08,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:32:08,632 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:32:08,704 INFO L628 ElimStorePlain]: treesize reduction 21, result has 83.5 percent of original size [2021-06-05 06:32:08,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:08,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:32:08,712 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:32:08,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:08,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:32:08,751 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:128, output treesize:114 [2021-06-05 06:32:09,115 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-06-05 06:32:09,164 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:09,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062289605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:09,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:09,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 06:32:09,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855482064] [2021-06-05 06:32:09,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 06:32:09,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:09,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 06:32:09,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:32:09,165 INFO L87 Difference]: Start difference. First operand 47507 states and 196122 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:09,700 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 69 [2021-06-05 06:32:10,522 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-06-05 06:32:12,019 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-06-05 06:32:12,859 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2021-06-05 06:32:13,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:13,302 INFO L93 Difference]: Finished difference Result 84792 states and 343664 transitions. [2021-06-05 06:32:13,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:32:13,302 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:32:13,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:13,532 INFO L225 Difference]: With dead ends: 84792 [2021-06-05 06:32:13,532 INFO L226 Difference]: Without dead ends: 84620 [2021-06-05 06:32:13,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 3262.7ms TimeCoverageRelationStatistics Valid=1043, Invalid=3787, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 06:32:13,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84620 states. [2021-06-05 06:32:14,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84620 to 47575. [2021-06-05 06:32:14,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47575 states, 47574 states have (on average 4.127758859881448) internal successors, (196374), 47574 states have internal predecessors, (196374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:14,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47575 states to 47575 states and 196374 transitions. [2021-06-05 06:32:14,740 INFO L78 Accepts]: Start accepts. Automaton has 47575 states and 196374 transitions. Word has length 39 [2021-06-05 06:32:14,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:14,740 INFO L482 AbstractCegarLoop]: Abstraction has 47575 states and 196374 transitions. [2021-06-05 06:32:14,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:14,740 INFO L276 IsEmpty]: Start isEmpty. Operand 47575 states and 196374 transitions. [2021-06-05 06:32:14,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:32:14,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:14,820 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:15,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable635 [2021-06-05 06:32:15,020 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:15,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:15,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1568952691, now seen corresponding path program 139 times [2021-06-05 06:32:15,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:15,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986237595] [2021-06-05 06:32:15,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:15,281 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:15,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:15,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986237595] [2021-06-05 06:32:15,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986237595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:15,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958307411] [2021-06-05 06:32:15,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:15,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:15,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:32:15,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:15,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:32:15,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:15,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:15,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:15,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 06:32:15,765 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:32:15,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:32:15,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:15,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:15,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:15,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:32:15,806 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:15,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958307411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:15,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:15,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:32:15,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234596915] [2021-06-05 06:32:15,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:32:15,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:15,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:32:15,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:32:15,807 INFO L87 Difference]: Start difference. First operand 47575 states and 196374 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:17,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:17,790 INFO L93 Difference]: Finished difference Result 97834 states and 398032 transitions. [2021-06-05 06:32:17,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:32:17,791 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:32:17,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:18,058 INFO L225 Difference]: With dead ends: 97834 [2021-06-05 06:32:18,058 INFO L226 Difference]: Without dead ends: 97744 [2021-06-05 06:32:18,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1085.6ms TimeCoverageRelationStatistics Valid=442, Invalid=2008, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:32:18,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97744 states. [2021-06-05 06:32:19,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97744 to 47223. [2021-06-05 06:32:19,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47223 states, 47222 states have (on average 4.130193553852018) internal successors, (195036), 47222 states have internal predecessors, (195036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:19,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47223 states to 47223 states and 195036 transitions. [2021-06-05 06:32:19,395 INFO L78 Accepts]: Start accepts. Automaton has 47223 states and 195036 transitions. Word has length 39 [2021-06-05 06:32:19,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:19,395 INFO L482 AbstractCegarLoop]: Abstraction has 47223 states and 195036 transitions. [2021-06-05 06:32:19,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:19,395 INFO L276 IsEmpty]: Start isEmpty. Operand 47223 states and 195036 transitions. [2021-06-05 06:32:19,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:32:19,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:19,474 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:19,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable663 [2021-06-05 06:32:19,675 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:19,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:19,675 INFO L82 PathProgramCache]: Analyzing trace with hash -833590785, now seen corresponding path program 140 times [2021-06-05 06:32:19,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:19,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043943188] [2021-06-05 06:32:19,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:19,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:19,908 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:19,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:19,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043943188] [2021-06-05 06:32:19,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043943188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:19,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589883862] [2021-06-05 06:32:19,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:19,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:32:19,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:32:19,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 06:32:19,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:20,124 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:32:20,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:32:20,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:20,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:20,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:20,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 06:32:20,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 06:32:20,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:20,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:20,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:20,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:18 [2021-06-05 06:32:20,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:20,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:32:20,216 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:32:20,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:20,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:32:20,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 06:32:20,256 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:20,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589883862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:20,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:20,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 06:32:20,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834412531] [2021-06-05 06:32:20,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:32:20,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:20,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:32:20,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:32:20,257 INFO L87 Difference]: Start difference. First operand 47223 states and 195036 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:21,311 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-06-05 06:32:22,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:22,488 INFO L93 Difference]: Finished difference Result 97580 states and 401250 transitions. [2021-06-05 06:32:22,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:32:22,488 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:32:22,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:22,770 INFO L225 Difference]: With dead ends: 97580 [2021-06-05 06:32:22,770 INFO L226 Difference]: Without dead ends: 97525 [2021-06-05 06:32:22,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1293.8ms TimeCoverageRelationStatistics Valid=391, Invalid=2261, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 06:32:22,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97525 states. [2021-06-05 06:32:24,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97525 to 47877. [2021-06-05 06:32:24,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47877 states, 47876 states have (on average 4.127872002673573) internal successors, (197626), 47876 states have internal predecessors, (197626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:24,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47877 states to 47877 states and 197626 transitions. [2021-06-05 06:32:24,459 INFO L78 Accepts]: Start accepts. Automaton has 47877 states and 197626 transitions. Word has length 39 [2021-06-05 06:32:24,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:24,459 INFO L482 AbstractCegarLoop]: Abstraction has 47877 states and 197626 transitions. [2021-06-05 06:32:24,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:24,459 INFO L276 IsEmpty]: Start isEmpty. Operand 47877 states and 197626 transitions. [2021-06-05 06:32:24,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:32:24,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:24,544 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:24,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-06-05 06:32:24,749 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:24,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:24,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1100928689, now seen corresponding path program 141 times [2021-06-05 06:32:24,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:24,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059642860] [2021-06-05 06:32:24,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:24,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:25,000 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:25,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:25,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059642860] [2021-06-05 06:32:25,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059642860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:25,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304400903] [2021-06-05 06:32:25,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:25,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:32:25,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:32:25,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 06:32:25,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:25,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:25,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:25,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:25,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 06:32:25,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:32:25,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:25,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:25,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:47 [2021-06-05 06:32:25,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:25,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:32:25,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:32:25,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:25,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:25,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:25,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:7 [2021-06-05 06:32:25,492 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:25,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304400903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:25,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:25,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:32:25,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657964680] [2021-06-05 06:32:25,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:32:25,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:25,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:32:25,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:32:25,492 INFO L87 Difference]: Start difference. First operand 47877 states and 197626 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:28,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:28,778 INFO L93 Difference]: Finished difference Result 85492 states and 348880 transitions. [2021-06-05 06:32:28,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:32:28,778 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:32:28,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:29,013 INFO L225 Difference]: With dead ends: 85492 [2021-06-05 06:32:29,013 INFO L226 Difference]: Without dead ends: 85372 [2021-06-05 06:32:29,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1408 ImplicationChecksByTransitivity, 1985.7ms TimeCoverageRelationStatistics Valid=624, Invalid=4206, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 06:32:29,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85372 states. [2021-06-05 06:32:30,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85372 to 48339. [2021-06-05 06:32:30,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48339 states, 48338 states have (on average 4.125987835657247) internal successors, (199442), 48338 states have internal predecessors, (199442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:30,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48339 states to 48339 states and 199442 transitions. [2021-06-05 06:32:30,305 INFO L78 Accepts]: Start accepts. Automaton has 48339 states and 199442 transitions. Word has length 39 [2021-06-05 06:32:30,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:30,305 INFO L482 AbstractCegarLoop]: Abstraction has 48339 states and 199442 transitions. [2021-06-05 06:32:30,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:30,306 INFO L276 IsEmpty]: Start isEmpty. Operand 48339 states and 199442 transitions. [2021-06-05 06:32:30,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:32:30,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:30,664 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:30,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable666 [2021-06-05 06:32:30,877 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:30,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:30,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1990821637, now seen corresponding path program 142 times [2021-06-05 06:32:30,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:30,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968087969] [2021-06-05 06:32:30,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:31,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:31,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968087969] [2021-06-05 06:32:31,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968087969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:31,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905372282] [2021-06-05 06:32:31,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:31,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:32:31,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:32:31,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:32:31,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:31,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:32:31,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:31,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:31,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:31,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 06:32:31,362 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:32:31,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 06:32:31,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:31,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:31,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:31,365 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-06-05 06:32:31,404 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:31,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905372282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:31,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:31,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 06:32:31,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469896326] [2021-06-05 06:32:31,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:32:31,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:31,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:32:31,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:32:31,405 INFO L87 Difference]: Start difference. First operand 48339 states and 199442 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:33,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:33,387 INFO L93 Difference]: Finished difference Result 91376 states and 375388 transitions. [2021-06-05 06:32:33,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:32:33,387 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:32:33,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:33,659 INFO L225 Difference]: With dead ends: 91376 [2021-06-05 06:32:33,660 INFO L226 Difference]: Without dead ends: 91321 [2021-06-05 06:32:33,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 782.0ms TimeCoverageRelationStatistics Valid=235, Invalid=1405, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:32:33,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91321 states. [2021-06-05 06:32:34,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91321 to 48907. [2021-06-05 06:32:34,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48907 states, 48906 states have (on average 4.128450496871549) internal successors, (201906), 48906 states have internal predecessors, (201906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:35,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48907 states to 48907 states and 201906 transitions. [2021-06-05 06:32:35,026 INFO L78 Accepts]: Start accepts. Automaton has 48907 states and 201906 transitions. Word has length 39 [2021-06-05 06:32:35,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:35,026 INFO L482 AbstractCegarLoop]: Abstraction has 48907 states and 201906 transitions. [2021-06-05 06:32:35,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:35,026 INFO L276 IsEmpty]: Start isEmpty. Operand 48907 states and 201906 transitions. [2021-06-05 06:32:35,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:32:35,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:35,111 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:35,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:35,312 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:35,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:35,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1666557629, now seen corresponding path program 143 times [2021-06-05 06:32:35,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:35,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047622741] [2021-06-05 06:32:35,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:35,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:35,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:35,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047622741] [2021-06-05 06:32:35,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047622741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:35,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496655497] [2021-06-05 06:32:35,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:35,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:32:35,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:32:35,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 06:32:35,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:35,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:35,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-06-05 06:32:35,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:35,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:35,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:35,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:61, output treesize:68 [2021-06-05 06:32:36,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:36,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:32:36,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 06:32:36,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:36,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:36,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:36,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:7 [2021-06-05 06:32:36,194 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:36,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496655497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:36,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:36,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-05 06:32:36,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444231735] [2021-06-05 06:32:36,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:32:36,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:36,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:32:36,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:32:36,195 INFO L87 Difference]: Start difference. First operand 48907 states and 201906 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:36,476 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-06-05 06:32:39,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:39,328 INFO L93 Difference]: Finished difference Result 92412 states and 378688 transitions. [2021-06-05 06:32:39,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:32:39,328 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:32:39,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:39,589 INFO L225 Difference]: With dead ends: 92412 [2021-06-05 06:32:39,589 INFO L226 Difference]: Without dead ends: 92373 [2021-06-05 06:32:39,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 2189.3ms TimeCoverageRelationStatistics Valid=482, Invalid=3808, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 06:32:39,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92373 states. [2021-06-05 06:32:40,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92373 to 49251. [2021-06-05 06:32:40,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49251 states, 49250 states have (on average 4.127187817258883) internal successors, (203264), 49250 states have internal predecessors, (203264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:40,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49251 states to 49251 states and 203264 transitions. [2021-06-05 06:32:40,920 INFO L78 Accepts]: Start accepts. Automaton has 49251 states and 203264 transitions. Word has length 39 [2021-06-05 06:32:40,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:40,920 INFO L482 AbstractCegarLoop]: Abstraction has 49251 states and 203264 transitions. [2021-06-05 06:32:40,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:40,920 INFO L276 IsEmpty]: Start isEmpty. Operand 49251 states and 203264 transitions. [2021-06-05 06:32:41,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:32:41,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:41,019 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:41,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable672 [2021-06-05 06:32:41,219 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:41,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:41,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1209416643, now seen corresponding path program 144 times [2021-06-05 06:32:41,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:41,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310814686] [2021-06-05 06:32:41,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:41,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:41,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:41,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310814686] [2021-06-05 06:32:41,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310814686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:41,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616832093] [2021-06-05 06:32:41,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:41,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:32:41,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:32:41,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 06:32:41,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:41,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:32:41,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:41,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:41,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:41,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 06:32:41,707 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:32:41,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:32:41,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:41,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:41,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:41,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:32:41,738 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:41,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616832093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:41,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:41,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-06-05 06:32:41,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230337648] [2021-06-05 06:32:41,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:32:41,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:41,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:32:41,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:32:41,739 INFO L87 Difference]: Start difference. First operand 49251 states and 203264 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:43,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:43,616 INFO L93 Difference]: Finished difference Result 98246 states and 404208 transitions. [2021-06-05 06:32:43,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:32:43,616 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:32:43,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:43,900 INFO L225 Difference]: With dead ends: 98246 [2021-06-05 06:32:43,900 INFO L226 Difference]: Without dead ends: 98191 [2021-06-05 06:32:43,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 794.2ms TimeCoverageRelationStatistics Valid=261, Invalid=1631, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:32:44,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98191 states. [2021-06-05 06:32:45,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98191 to 49243. [2021-06-05 06:32:45,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49243 states, 49242 states have (on average 4.129198651557614) internal successors, (203330), 49242 states have internal predecessors, (203330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:45,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49243 states to 49243 states and 203330 transitions. [2021-06-05 06:32:45,789 INFO L78 Accepts]: Start accepts. Automaton has 49243 states and 203330 transitions. Word has length 39 [2021-06-05 06:32:45,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:45,790 INFO L482 AbstractCegarLoop]: Abstraction has 49243 states and 203330 transitions. [2021-06-05 06:32:45,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:45,790 INFO L276 IsEmpty]: Start isEmpty. Operand 49243 states and 203330 transitions. [2021-06-05 06:32:45,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:32:45,906 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:45,906 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:46,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:46,107 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:46,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:46,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1083281079, now seen corresponding path program 145 times [2021-06-05 06:32:46,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:46,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098965007] [2021-06-05 06:32:46,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:46,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:46,354 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:46,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:46,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098965007] [2021-06-05 06:32:46,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098965007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:46,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729277102] [2021-06-05 06:32:46,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:46,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:32:46,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:46,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:32:46,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:46,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:46,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:46,553 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 06:32:46,605 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:32:46,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:32:46,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:46,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:46,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:46,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:32:46,644 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:46,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729277102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:46,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:46,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:32:46,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890022758] [2021-06-05 06:32:46,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:32:46,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:46,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:32:46,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:32:46,644 INFO L87 Difference]: Start difference. First operand 49243 states and 203330 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:49,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:49,023 INFO L93 Difference]: Finished difference Result 134958 states and 547545 transitions. [2021-06-05 06:32:49,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:32:49,023 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:32:49,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:49,428 INFO L225 Difference]: With dead ends: 134958 [2021-06-05 06:32:49,428 INFO L226 Difference]: Without dead ends: 134903 [2021-06-05 06:32:49,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1174.9ms TimeCoverageRelationStatistics Valid=524, Invalid=2446, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:32:49,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134903 states. [2021-06-05 06:32:51,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134903 to 48567. [2021-06-05 06:32:51,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48567 states, 48566 states have (on average 4.124366840999876) internal successors, (200304), 48566 states have internal predecessors, (200304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:51,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48567 states to 48567 states and 200304 transitions. [2021-06-05 06:32:51,512 INFO L78 Accepts]: Start accepts. Automaton has 48567 states and 200304 transitions. Word has length 39 [2021-06-05 06:32:51,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:51,512 INFO L482 AbstractCegarLoop]: Abstraction has 48567 states and 200304 transitions. [2021-06-05 06:32:51,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:51,513 INFO L276 IsEmpty]: Start isEmpty. Operand 48567 states and 200304 transitions. [2021-06-05 06:32:51,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:32:51,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:51,599 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:51,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable681,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:51,799 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:51,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:51,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1414239241, now seen corresponding path program 146 times [2021-06-05 06:32:51,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:51,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808953980] [2021-06-05 06:32:51,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:51,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:52,080 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:52,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:52,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808953980] [2021-06-05 06:32:52,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808953980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:52,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214763805] [2021-06-05 06:32:52,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:52,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:32:52,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:32:52,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:32:52,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:52,306 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:32:52,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:32:52,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:52,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:52,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:52,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 06:32:52,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:32:52,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:52,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:52,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:52,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:32:52,378 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:52,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214763805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:52,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:52,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:32:52,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109127186] [2021-06-05 06:32:52,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:32:52,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:52,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:32:52,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:32:52,379 INFO L87 Difference]: Start difference. First operand 48567 states and 200304 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:53,967 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-06-05 06:32:54,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:54,487 INFO L93 Difference]: Finished difference Result 98095 states and 398150 transitions. [2021-06-05 06:32:54,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 06:32:54,487 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:32:54,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:54,761 INFO L225 Difference]: With dead ends: 98095 [2021-06-05 06:32:54,761 INFO L226 Difference]: Without dead ends: 97797 [2021-06-05 06:32:54,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1346.8ms TimeCoverageRelationStatistics Valid=449, Invalid=2203, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 06:32:54,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97797 states. [2021-06-05 06:32:55,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97797 to 48635. [2021-06-05 06:32:56,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48635 states, 48634 states have (on average 4.123658346013078) internal successors, (200550), 48634 states have internal predecessors, (200550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:56,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48635 states to 48635 states and 200550 transitions. [2021-06-05 06:32:56,197 INFO L78 Accepts]: Start accepts. Automaton has 48635 states and 200550 transitions. Word has length 39 [2021-06-05 06:32:56,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:56,197 INFO L482 AbstractCegarLoop]: Abstraction has 48635 states and 200550 transitions. [2021-06-05 06:32:56,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:56,197 INFO L276 IsEmpty]: Start isEmpty. Operand 48635 states and 200550 transitions. [2021-06-05 06:32:56,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:32:56,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:56,282 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:56,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable682 [2021-06-05 06:32:56,483 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:56,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:56,483 INFO L82 PathProgramCache]: Analyzing trace with hash 254375689, now seen corresponding path program 147 times [2021-06-05 06:32:56,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:56,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867456636] [2021-06-05 06:32:56,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:56,737 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:56,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:56,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867456636] [2021-06-05 06:32:56,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867456636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:56,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293684988] [2021-06-05 06:32:56,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:56,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:32:56,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:32:56,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 06:32:56,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:57,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-06-05 06:32:57,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:57,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:57,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:57,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:40 [2021-06-05 06:32:57,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:57,339 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:57,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-06-05 06:32:57,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:57,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:57,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:32:57,352 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:75 [2021-06-05 06:32:57,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:57,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:32:57,396 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:32:57,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:57,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:57,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2021-06-05 06:32:57,415 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:57,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:57,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:32:57,431 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:44 [2021-06-05 06:32:57,506 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:57,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293684988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:57,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:57,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:32:57,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716495802] [2021-06-05 06:32:57,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:32:57,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:57,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:32:57,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:32:57,507 INFO L87 Difference]: Start difference. First operand 48635 states and 200550 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:57,863 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2021-06-05 06:32:59,974 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-05 06:33:02,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:33:02,711 INFO L93 Difference]: Finished difference Result 105459 states and 425788 transitions. [2021-06-05 06:33:02,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 06:33:02,711 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:33:02,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:33:03,009 INFO L225 Difference]: With dead ends: 105459 [2021-06-05 06:33:03,009 INFO L226 Difference]: Without dead ends: 105111 [2021-06-05 06:33:03,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3051 ImplicationChecksByTransitivity, 4046.5ms TimeCoverageRelationStatistics Valid=1565, Invalid=6991, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 06:33:03,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105111 states. [2021-06-05 06:33:04,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105111 to 49114. [2021-06-05 06:33:04,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49114 states, 49113 states have (on average 4.123877588418545) internal successors, (202536), 49113 states have internal predecessors, (202536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:33:04,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49114 states to 49114 states and 202536 transitions. [2021-06-05 06:33:04,428 INFO L78 Accepts]: Start accepts. Automaton has 49114 states and 202536 transitions. Word has length 39 [2021-06-05 06:33:04,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:33:04,428 INFO L482 AbstractCegarLoop]: Abstraction has 49114 states and 202536 transitions. [2021-06-05 06:33:04,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:33:04,428 INFO L276 IsEmpty]: Start isEmpty. Operand 49114 states and 202536 transitions. [2021-06-05 06:33:04,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:33:04,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:33:04,511 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:33:04,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable683 [2021-06-05 06:33:04,712 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:33:04,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:33:04,712 INFO L82 PathProgramCache]: Analyzing trace with hash 2010777609, now seen corresponding path program 148 times [2021-06-05 06:33:04,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:33:04,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989120533] [2021-06-05 06:33:04,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:33:04,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:33:04,968 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:33:04,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:33:04,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989120533] [2021-06-05 06:33:04,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989120533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:33:04,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959435580] [2021-06-05 06:33:04,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:33:04,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:33:04,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:33:04,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:33:04,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:33:05,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:33:05,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:33:05,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:05,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:33:05,191 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 06:33:05,217 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:33:05,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:33:05,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:33:05,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:05,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:33:05,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:33:05,256 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:33:05,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959435580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:33:05,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:33:05,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:33:05,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808816068] [2021-06-05 06:33:05,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:33:05,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:33:05,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:33:05,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:33:05,257 INFO L87 Difference]: Start difference. First operand 49114 states and 202536 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:33:07,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:33:07,869 INFO L93 Difference]: Finished difference Result 100318 states and 407990 transitions. [2021-06-05 06:33:07,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:33:07,869 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:33:07,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:33:08,453 INFO L225 Difference]: With dead ends: 100318 [2021-06-05 06:33:08,453 INFO L226 Difference]: Without dead ends: 100228 [2021-06-05 06:33:08,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 1146.0ms TimeCoverageRelationStatistics Valid=464, Invalid=2398, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:33:08,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100228 states. [2021-06-05 06:33:09,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100228 to 49002. [2021-06-05 06:33:09,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49002 states, 49001 states have (on average 4.12522193424624) internal successors, (202140), 49001 states have internal predecessors, (202140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:33:09,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49002 states to 49002 states and 202140 transitions. [2021-06-05 06:33:09,876 INFO L78 Accepts]: Start accepts. Automaton has 49002 states and 202140 transitions. Word has length 39 [2021-06-05 06:33:09,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:33:09,876 INFO L482 AbstractCegarLoop]: Abstraction has 49002 states and 202140 transitions. [2021-06-05 06:33:09,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:33:09,876 INFO L276 IsEmpty]: Start isEmpty. Operand 49002 states and 202140 transitions. [2021-06-05 06:33:09,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:33:09,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:33:09,958 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:33:10,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable689 [2021-06-05 06:33:10,158 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:33:10,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:33:10,159 INFO L82 PathProgramCache]: Analyzing trace with hash 2005940339, now seen corresponding path program 149 times [2021-06-05 06:33:10,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:33:10,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391297147] [2021-06-05 06:33:10,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:33:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:33:10,415 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:33:10,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:33:10,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391297147] [2021-06-05 06:33:10,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391297147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:33:10,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798587951] [2021-06-05 06:33:10,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:33:10,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:33:10,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:33:10,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 06:33:10,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:33:10,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:33:10,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:33:10,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:10,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:33:10,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:70, output treesize:56 [2021-06-05 06:33:10,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:33:10,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:33:10,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:33:10,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 06:33:10,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:33:10,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:10,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:33:10,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:18 [2021-06-05 06:33:10,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:10,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-06-05 06:33:10,854 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:33:10,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:33:10,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:33:10,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:13 [2021-06-05 06:33:10,906 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:33:10,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798587951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:33:10,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:33:10,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 06:33:10,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323369549] [2021-06-05 06:33:10,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:33:10,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:33:10,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:33:10,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:33:10,907 INFO L87 Difference]: Start difference. First operand 49002 states and 202140 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:33:11,823 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-06-05 06:33:15,243 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-06-05 06:33:16,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:33:16,732 INFO L93 Difference]: Finished difference Result 129656 states and 525516 transitions. [2021-06-05 06:33:16,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 06:33:16,732 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:33:16,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. Received shutdown request... [2021-06-05 06:33:17,123 INFO L225 Difference]: With dead ends: 129656 [2021-06-05 06:33:17,123 INFO L226 Difference]: Without dead ends: 129341 [2021-06-05 06:33:17,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2496 ImplicationChecksByTransitivity, 3370.0ms TimeCoverageRelationStatistics Valid=1314, Invalid=6342, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 06:33:17,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129341 states. [2021-06-05 06:33:17,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable690,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:33:17,486 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 06:33:17,488 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 06:33:17,489 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 06:33:17,489 INFO L202 PluginConnector]: Adding new model buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 06:33:17 BasicIcfg [2021-06-05 06:33:17,489 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 06:33:17,490 INFO L168 Benchmark]: Toolchain (without parser) took 740837.22 ms. Allocated memory was 408.9 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 388.0 MB in the beginning and 8.9 GB in the end (delta: -8.5 GB). Peak memory consumption was 7.1 GB. Max. memory is 16.0 GB. [2021-06-05 06:33:17,490 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 408.9 MB. Free memory is still 389.2 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 06:33:17,490 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.81 ms. Allocated memory is still 408.9 MB. Free memory was 388.0 MB in the beginning and 386.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 06:33:17,490 INFO L168 Benchmark]: Boogie Preprocessor took 13.20 ms. Allocated memory is still 408.9 MB. Free memory was 386.5 MB in the beginning and 385.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 06:33:17,490 INFO L168 Benchmark]: RCFGBuilder took 206.27 ms. Allocated memory is still 408.9 MB. Free memory was 385.3 MB in the beginning and 370.2 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 06:33:17,490 INFO L168 Benchmark]: TraceAbstraction took 740596.75 ms. Allocated memory was 408.9 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 369.8 MB in the beginning and 8.9 GB in the end (delta: -8.6 GB). Peak memory consumption was 7.0 GB. Max. memory is 16.0 GB. [2021-06-05 06:33:17,490 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 408.9 MB. Free memory is still 389.2 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.81 ms. Allocated memory is still 408.9 MB. Free memory was 388.0 MB in the beginning and 386.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.20 ms. Allocated memory is still 408.9 MB. Free memory was 386.5 MB in the beginning and 385.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 206.27 ms. Allocated memory is still 408.9 MB. Free memory was 385.3 MB in the beginning and 370.2 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 740596.75 ms. Allocated memory was 408.9 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 369.8 MB in the beginning and 8.9 GB in the end (delta: -8.6 GB). Peak memory consumption was 7.0 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 54 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 740528.4ms, OverallIterations: 158, TraceHistogramMax: 2, EmptinessCheckTime: 12748.3ms, AutomataDifference: 410599.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 88.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 12055 SDtfs, 75428 SDslu, 141645 SDs, 0 SdLazy, 257320 SolverSat, 15213 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 111933.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11919 GetRequests, 4080 SyntacticMatches, 164 SemanticMatches, 7675 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138199 ImplicationChecksByTransitivity, 240397.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=49251occurred in iteration=152, InterpolantAutomatonStates: 5762, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 178787.0ms AutomataMinimizationTime, 158 MinimizatonAttempts, 5859267 StatesRemovedByMinimization, 157 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 609.0ms SsaConstructionTime, 2326.8ms SatisfiabilityAnalysisTime, 100245.2ms InterpolantComputationTime, 11671 NumberOfCodeBlocks, 11667 NumberOfCodeBlocksAsserted, 563 NumberOfCheckSat, 11361 ConstructedInterpolants, 432 QuantifiedInterpolants, 298080 SizeOfPredicates, 1149 NumberOfNonLiveVariables, 17357 ConjunctsInSsa, 5926 ConjunctsInUnsatCore, 310 InterpolantComputations, 8 PerfectInterpolantSequences, 222/5052 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