/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/float-benchs/feedback_diverge.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 03:41:24,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:41:24,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:41:24,997 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 03:41:25,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 03:41:25,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 03:41:25,034 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 03:41:25,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 03:41:25,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 03:41:25,051 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 03:41:25,058 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 03:41:25,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 03:41:25,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 03:41:25,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 03:41:25,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 03:41:25,074 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 03:41:25,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 03:41:25,101 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:41:25,153 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:41:25,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:41:25,158 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:41:25,158 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:41:25,159 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:41:25,159 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:41:25,159 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:41:25,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:41:25,159 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:41:25,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:41:25,161 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:41:25,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:41:25,161 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:41:25,162 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:41:25,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:41:25,162 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:41:25,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:41:25,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:41:25,163 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:41:25,163 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:41:25,163 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:41:25,164 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:41:25,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:41:25,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:41:25,164 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:41:25,164 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:41:25,652 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:41:25,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:41:25,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:41:25,689 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:41:25,690 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:41:25,691 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/feedback_diverge.c [2020-12-22 03:41:25,775 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49250c00a/87bb0b31e2844baeb62801ea67a9d887/FLAG1dda2766b [2020-12-22 03:41:26,325 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:41:26,326 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/feedback_diverge.c [2020-12-22 03:41:26,333 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49250c00a/87bb0b31e2844baeb62801ea67a9d887/FLAG1dda2766b [2020-12-22 03:41:26,714 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49250c00a/87bb0b31e2844baeb62801ea67a9d887 [2020-12-22 03:41:26,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:41:26,721 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:41:26,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:41:26,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:41:26,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:41:26,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:41:26" (1/1) ... [2020-12-22 03:41:26,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b1f55e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:26, skipping insertion in model container [2020-12-22 03:41:26,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:41:26" (1/1) ... [2020-12-22 03:41:26,745 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:41:26,764 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:41:26,900 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/feedback_diverge.c[626,639] [2020-12-22 03:41:26,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:41:26,930 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:41:26,946 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/feedback_diverge.c[626,639] [2020-12-22 03:41:26,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:41:26,970 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:41:26,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:26 WrapperNode [2020-12-22 03:41:26,970 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:41:26,972 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:41:26,972 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:41:26,972 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:41:26,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:26" (1/1) ... [2020-12-22 03:41:26,991 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:26" (1/1) ... [2020-12-22 03:41:27,014 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:41:27,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:41:27,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:41:27,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:41:27,026 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:26" (1/1) ... [2020-12-22 03:41:27,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:26" (1/1) ... [2020-12-22 03:41:27,028 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:26" (1/1) ... [2020-12-22 03:41:27,029 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:26" (1/1) ... [2020-12-22 03:41:27,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:26" (1/1) ... [2020-12-22 03:41:27,038 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:26" (1/1) ... [2020-12-22 03:41:27,040 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:26" (1/1) ... [2020-12-22 03:41:27,042 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:41:27,043 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:41:27,043 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:41:27,043 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:41:27,044 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:26" (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 [2020-12-22 03:41:27,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:41:27,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:41:27,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:41:27,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:41:27,474 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:41:27,474 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-22 03:41:27,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:41:27 BoogieIcfgContainer [2020-12-22 03:41:27,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:41:27,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:41:27,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:41:27,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:41:27,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:41:26" (1/3) ... [2020-12-22 03:41:27,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e25a992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:41:27, skipping insertion in model container [2020-12-22 03:41:27,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:26" (2/3) ... [2020-12-22 03:41:27,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e25a992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:41:27, skipping insertion in model container [2020-12-22 03:41:27,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:41:27" (3/3) ... [2020-12-22 03:41:27,487 INFO L111 eAbstractionObserver]: Analyzing ICFG feedback_diverge.c [2020-12-22 03:41:27,496 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:41:27,503 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 03:41:27,528 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 03:41:27,663 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:41:27,663 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:41:27,663 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:41:27,663 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:41:27,664 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:41:27,664 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:41:27,664 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:41:27,664 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:41:27,690 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-12-22 03:41:27,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 03:41:27,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:27,703 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 03:41:27,703 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:27,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:27,718 INFO L82 PathProgramCache]: Analyzing trace with hash 889618939, now seen corresponding path program 1 times [2020-12-22 03:41:27,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:27,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147448468] [2020-12-22 03:41:27,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:27,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:27,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147448468] [2020-12-22 03:41:27,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:41:27,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 03:41:27,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739019164] [2020-12-22 03:41:27,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:41:27,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:27,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:41:27,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:41:27,948 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2020-12-22 03:41:27,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:27,985 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2020-12-22 03:41:27,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:41:27,988 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-22 03:41:27,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:27,998 INFO L225 Difference]: With dead ends: 33 [2020-12-22 03:41:27,998 INFO L226 Difference]: Without dead ends: 16 [2020-12-22 03:41:28,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:41:28,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-22 03:41:28,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2020-12-22 03:41:28,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-22 03:41:28,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-12-22 03:41:28,039 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 6 [2020-12-22 03:41:28,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:28,039 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-12-22 03:41:28,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:41:28,040 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-12-22 03:41:28,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 03:41:28,041 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:28,041 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:28,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:41:28,042 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:28,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:28,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1271799529, now seen corresponding path program 1 times [2020-12-22 03:41:28,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:28,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721945528] [2020-12-22 03:41:28,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:28,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:28,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:28,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721945528] [2020-12-22 03:41:28,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931640356] [2020-12-22 03:41:28,108 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 [2020-12-22 03:41:28,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:28,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 03:41:28,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:28,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:28,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:28,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 03:41:28,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114768608] [2020-12-22 03:41:28,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 03:41:28,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:28,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 03:41:28,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:41:28,322 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 5 states. [2020-12-22 03:41:28,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:28,342 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-12-22 03:41:28,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 03:41:28,343 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-22 03:41:28,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:28,344 INFO L225 Difference]: With dead ends: 25 [2020-12-22 03:41:28,344 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 03:41:28,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:41:28,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 03:41:28,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2020-12-22 03:41:28,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 03:41:28,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-22 03:41:28,350 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2020-12-22 03:41:28,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:28,350 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-22 03:41:28,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 03:41:28,350 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-22 03:41:28,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 03:41:28,351 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:28,351 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:28,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 03:41:28,566 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:28,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:28,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1250006231, now seen corresponding path program 2 times [2020-12-22 03:41:28,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:28,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187117348] [2020-12-22 03:41:28,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:28,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:28,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:28,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187117348] [2020-12-22 03:41:28,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541634083] [2020-12-22 03:41:28,683 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 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 [2020-12-22 03:41:28,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:41:28,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:28,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 03:41:28,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:28,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:28,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:28,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 03:41:28,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744347255] [2020-12-22 03:41:28,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 03:41:28,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:28,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 03:41:28,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 03:41:28,783 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 6 states. [2020-12-22 03:41:28,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:28,811 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-12-22 03:41:28,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 03:41:28,812 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-22 03:41:28,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:28,813 INFO L225 Difference]: With dead ends: 30 [2020-12-22 03:41:28,813 INFO L226 Difference]: Without dead ends: 26 [2020-12-22 03:41:28,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 03:41:28,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-22 03:41:28,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2020-12-22 03:41:28,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 03:41:28,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-12-22 03:41:28,819 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2020-12-22 03:41:28,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:28,820 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-12-22 03:41:28,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 03:41:28,820 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-12-22 03:41:28,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 03:41:28,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:28,821 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:29,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:29,034 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:29,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:29,036 INFO L82 PathProgramCache]: Analyzing trace with hash 898393029, now seen corresponding path program 3 times [2020-12-22 03:41:29,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:29,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801459116] [2020-12-22 03:41:29,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:29,110 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:29,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801459116] [2020-12-22 03:41:29,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436678532] [2020-12-22 03:41:29,111 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 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 [2020-12-22 03:41:29,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 03:41:29,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:29,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 03:41:29,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:29,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:29,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 03:41:29,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661916557] [2020-12-22 03:41:29,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 03:41:29,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:29,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 03:41:29,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:41:29,232 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 7 states. [2020-12-22 03:41:29,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:29,264 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-12-22 03:41:29,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 03:41:29,264 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-12-22 03:41:29,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:29,265 INFO L225 Difference]: With dead ends: 35 [2020-12-22 03:41:29,265 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 03:41:29,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:41:29,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 03:41:29,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-12-22 03:41:29,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 03:41:29,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-12-22 03:41:29,272 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2020-12-22 03:41:29,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:29,272 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-12-22 03:41:29,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 03:41:29,273 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-12-22 03:41:29,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 03:41:29,273 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:29,274 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:29,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:29,488 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:29,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:29,490 INFO L82 PathProgramCache]: Analyzing trace with hash -275117133, now seen corresponding path program 4 times [2020-12-22 03:41:29,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:29,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180943255] [2020-12-22 03:41:29,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:29,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:29,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180943255] [2020-12-22 03:41:29,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790972252] [2020-12-22 03:41:29,593 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 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 [2020-12-22 03:41:29,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:41:29,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:29,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 03:41:29,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:29,797 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:29,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:29,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 03:41:29,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450017952] [2020-12-22 03:41:29,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 03:41:29,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:29,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 03:41:29,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 03:41:29,800 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 8 states. [2020-12-22 03:41:29,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:29,847 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-12-22 03:41:29,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 03:41:29,847 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-12-22 03:41:29,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:29,849 INFO L225 Difference]: With dead ends: 40 [2020-12-22 03:41:29,849 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 03:41:29,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 03:41:29,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 03:41:29,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2020-12-22 03:41:29,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 03:41:29,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-12-22 03:41:29,856 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 22 [2020-12-22 03:41:29,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:29,856 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-12-22 03:41:29,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 03:41:29,857 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-12-22 03:41:29,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 03:41:29,858 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:29,858 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:30,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:30,073 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:30,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:30,076 INFO L82 PathProgramCache]: Analyzing trace with hash 429264033, now seen corresponding path program 5 times [2020-12-22 03:41:30,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:30,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24644212] [2020-12-22 03:41:30,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:30,173 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:30,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24644212] [2020-12-22 03:41:30,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221343586] [2020-12-22 03:41:30,174 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:30,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 03:41:30,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:30,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 03:41:30,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:30,312 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:30,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:30,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 03:41:30,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299395267] [2020-12-22 03:41:30,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 03:41:30,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:30,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 03:41:30,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 03:41:30,315 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 9 states. [2020-12-22 03:41:30,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:30,365 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-12-22 03:41:30,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 03:41:30,366 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-12-22 03:41:30,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:30,367 INFO L225 Difference]: With dead ends: 45 [2020-12-22 03:41:30,367 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 03:41:30,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 03:41:30,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 03:41:30,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-12-22 03:41:30,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 03:41:30,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-12-22 03:41:30,374 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 26 [2020-12-22 03:41:30,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:30,375 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-12-22 03:41:30,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 03:41:30,375 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-12-22 03:41:30,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 03:41:30,376 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:30,376 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:30,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 03:41:30,592 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:30,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:30,593 INFO L82 PathProgramCache]: Analyzing trace with hash -223615345, now seen corresponding path program 6 times [2020-12-22 03:41:30,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:30,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679551818] [2020-12-22 03:41:30,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:30,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:30,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679551818] [2020-12-22 03:41:30,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955036229] [2020-12-22 03:41:30,792 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 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 [2020-12-22 03:41:30,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 03:41:30,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:30,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 03:41:30,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:31,035 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:31,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:31,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 03:41:31,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537483303] [2020-12-22 03:41:31,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 03:41:31,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:31,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 03:41:31,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 03:41:31,038 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 10 states. [2020-12-22 03:41:31,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:31,084 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-12-22 03:41:31,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 03:41:31,087 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-12-22 03:41:31,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:31,088 INFO L225 Difference]: With dead ends: 50 [2020-12-22 03:41:31,088 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 03:41:31,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 03:41:31,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 03:41:31,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-12-22 03:41:31,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 03:41:31,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-12-22 03:41:31,095 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 30 [2020-12-22 03:41:31,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:31,095 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-12-22 03:41:31,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 03:41:31,095 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-12-22 03:41:31,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 03:41:31,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:31,096 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:31,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:31,298 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:31,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:31,299 INFO L82 PathProgramCache]: Analyzing trace with hash 944183677, now seen corresponding path program 7 times [2020-12-22 03:41:31,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:31,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422400945] [2020-12-22 03:41:31,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:31,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:31,465 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:31,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422400945] [2020-12-22 03:41:31,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146289520] [2020-12-22 03:41:31,466 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 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 [2020-12-22 03:41:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:31,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 03:41:31,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:31,661 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:31,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:31,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 03:41:31,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703115151] [2020-12-22 03:41:31,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 03:41:31,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:31,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 03:41:31,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 03:41:31,666 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 11 states. [2020-12-22 03:41:31,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:31,716 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2020-12-22 03:41:31,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 03:41:31,717 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-12-22 03:41:31,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:31,723 INFO L225 Difference]: With dead ends: 55 [2020-12-22 03:41:31,723 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 03:41:31,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 03:41:31,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 03:41:31,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2020-12-22 03:41:31,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 03:41:31,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-12-22 03:41:31,750 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 34 [2020-12-22 03:41:31,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:31,750 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-12-22 03:41:31,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 03:41:31,751 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-12-22 03:41:31,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 03:41:31,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:31,752 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:31,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:31,959 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:31,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:31,961 INFO L82 PathProgramCache]: Analyzing trace with hash 101918059, now seen corresponding path program 8 times [2020-12-22 03:41:31,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:31,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442366554] [2020-12-22 03:41:31,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:32,113 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:32,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442366554] [2020-12-22 03:41:32,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928868272] [2020-12-22 03:41:32,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:32,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:41:32,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:32,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 03:41:32,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:32,278 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:32,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:32,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 03:41:32,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341734802] [2020-12-22 03:41:32,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 03:41:32,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:32,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 03:41:32,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 03:41:32,284 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 12 states. [2020-12-22 03:41:32,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:32,329 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2020-12-22 03:41:32,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 03:41:32,330 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-12-22 03:41:32,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:32,331 INFO L225 Difference]: With dead ends: 60 [2020-12-22 03:41:32,331 INFO L226 Difference]: Without dead ends: 56 [2020-12-22 03:41:32,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 03:41:32,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-22 03:41:32,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2020-12-22 03:41:32,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 03:41:32,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2020-12-22 03:41:32,338 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 38 [2020-12-22 03:41:32,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:32,338 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2020-12-22 03:41:32,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 03:41:32,339 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2020-12-22 03:41:32,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 03:41:32,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:32,340 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:32,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 03:41:32,557 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:32,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:32,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1241806247, now seen corresponding path program 9 times [2020-12-22 03:41:32,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:32,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114731255] [2020-12-22 03:41:32,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:32,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:32,674 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:32,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114731255] [2020-12-22 03:41:32,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889139061] [2020-12-22 03:41:32,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:32,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 03:41:32,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:32,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 03:41:32,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:32,812 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:32,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:32,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 03:41:32,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114728828] [2020-12-22 03:41:32,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 03:41:32,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:32,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 03:41:32,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 03:41:32,815 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 13 states. [2020-12-22 03:41:32,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:32,862 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2020-12-22 03:41:32,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 03:41:32,863 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-12-22 03:41:32,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:32,864 INFO L225 Difference]: With dead ends: 65 [2020-12-22 03:41:32,864 INFO L226 Difference]: Without dead ends: 61 [2020-12-22 03:41:32,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 03:41:32,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-22 03:41:32,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-12-22 03:41:32,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 03:41:32,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2020-12-22 03:41:32,871 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 42 [2020-12-22 03:41:32,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:32,872 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2020-12-22 03:41:32,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 03:41:32,872 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2020-12-22 03:41:32,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 03:41:32,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:32,873 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:33,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:33,087 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:33,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:33,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1070872505, now seen corresponding path program 10 times [2020-12-22 03:41:33,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:33,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939847884] [2020-12-22 03:41:33,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:33,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:33,240 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:33,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939847884] [2020-12-22 03:41:33,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315838815] [2020-12-22 03:41:33,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:33,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:41:33,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:33,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 03:41:33,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:33,392 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:33,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:33,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 03:41:33,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573399479] [2020-12-22 03:41:33,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 03:41:33,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:33,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 03:41:33,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 03:41:33,395 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand 14 states. [2020-12-22 03:41:33,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:33,446 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2020-12-22 03:41:33,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 03:41:33,447 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-12-22 03:41:33,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:33,448 INFO L225 Difference]: With dead ends: 70 [2020-12-22 03:41:33,448 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 03:41:33,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 03:41:33,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 03:41:33,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2020-12-22 03:41:33,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 03:41:33,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2020-12-22 03:41:33,455 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 46 [2020-12-22 03:41:33,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:33,455 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2020-12-22 03:41:33,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 03:41:33,455 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2020-12-22 03:41:33,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 03:41:33,457 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:33,457 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:33,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:33,668 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:33,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:33,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1693491403, now seen corresponding path program 11 times [2020-12-22 03:41:33,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:33,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744533250] [2020-12-22 03:41:33,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:33,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:33,843 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:33,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744533250] [2020-12-22 03:41:33,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439678000] [2020-12-22 03:41:33,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 03:41:33,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 03:41:33,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:33,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 03:41:33,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:34,024 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:34,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:34,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 03:41:34,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906373126] [2020-12-22 03:41:34,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 03:41:34,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:34,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 03:41:34,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 03:41:34,028 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand 15 states. [2020-12-22 03:41:34,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:34,098 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2020-12-22 03:41:34,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 03:41:34,098 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-12-22 03:41:34,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:34,099 INFO L225 Difference]: With dead ends: 75 [2020-12-22 03:41:34,099 INFO L226 Difference]: Without dead ends: 71 [2020-12-22 03:41:34,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 03:41:34,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-22 03:41:34,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2020-12-22 03:41:34,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-22 03:41:34,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-12-22 03:41:34,106 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 50 [2020-12-22 03:41:34,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:34,106 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-12-22 03:41:34,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 03:41:34,106 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-12-22 03:41:34,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 03:41:34,107 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:34,108 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:34,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 03:41:34,314 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:34,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:34,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1689137373, now seen corresponding path program 12 times [2020-12-22 03:41:34,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:34,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966792205] [2020-12-22 03:41:34,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:34,535 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:34,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966792205] [2020-12-22 03:41:34,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948478282] [2020-12-22 03:41:34,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:34,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 03:41:34,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:34,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 03:41:34,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:34,698 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:34,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:34,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 03:41:34,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939840631] [2020-12-22 03:41:34,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 03:41:34,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:34,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 03:41:34,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 03:41:34,701 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 16 states. [2020-12-22 03:41:34,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:34,762 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2020-12-22 03:41:34,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 03:41:34,762 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 54 [2020-12-22 03:41:34,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:34,763 INFO L225 Difference]: With dead ends: 80 [2020-12-22 03:41:34,763 INFO L226 Difference]: Without dead ends: 76 [2020-12-22 03:41:34,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 03:41:34,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-22 03:41:34,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-12-22 03:41:34,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 03:41:34,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-12-22 03:41:34,785 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 54 [2020-12-22 03:41:34,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:34,785 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-12-22 03:41:34,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 03:41:34,785 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-12-22 03:41:34,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 03:41:34,791 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:34,792 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:34,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 03:41:34,993 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:34,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:34,994 INFO L82 PathProgramCache]: Analyzing trace with hash -740386799, now seen corresponding path program 13 times [2020-12-22 03:41:34,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:34,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392672117] [2020-12-22 03:41:34,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:35,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:35,168 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:35,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392672117] [2020-12-22 03:41:35,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699372783] [2020-12-22 03:41:35,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 03:41:35,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:35,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 03:41:35,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:35,311 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:35,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:35,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 03:41:35,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999025735] [2020-12-22 03:41:35,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 03:41:35,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:35,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 03:41:35,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 03:41:35,313 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 17 states. [2020-12-22 03:41:35,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:35,368 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2020-12-22 03:41:35,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 03:41:35,368 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 58 [2020-12-22 03:41:35,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:35,369 INFO L225 Difference]: With dead ends: 85 [2020-12-22 03:41:35,370 INFO L226 Difference]: Without dead ends: 81 [2020-12-22 03:41:35,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 03:41:35,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-22 03:41:35,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2020-12-22 03:41:35,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-22 03:41:35,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2020-12-22 03:41:35,375 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 58 [2020-12-22 03:41:35,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:35,376 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2020-12-22 03:41:35,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 03:41:35,377 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2020-12-22 03:41:35,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 03:41:35,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:35,378 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:35,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 03:41:35,580 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:35,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:35,581 INFO L82 PathProgramCache]: Analyzing trace with hash -169788929, now seen corresponding path program 14 times [2020-12-22 03:41:35,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:35,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381257748] [2020-12-22 03:41:35,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:35,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:35,808 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:35,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381257748] [2020-12-22 03:41:35,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209023745] [2020-12-22 03:41:35,809 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 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 [2020-12-22 03:41:35,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:41:35,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:35,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 03:41:35,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:35,968 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:35,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:35,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 03:41:35,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697666802] [2020-12-22 03:41:35,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 03:41:35,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:35,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 03:41:35,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 03:41:35,971 INFO L87 Difference]: Start difference. First operand 77 states and 91 transitions. Second operand 18 states. [2020-12-22 03:41:36,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:36,031 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2020-12-22 03:41:36,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 03:41:36,032 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 62 [2020-12-22 03:41:36,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:36,033 INFO L225 Difference]: With dead ends: 90 [2020-12-22 03:41:36,033 INFO L226 Difference]: Without dead ends: 86 [2020-12-22 03:41:36,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 03:41:36,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-22 03:41:36,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2020-12-22 03:41:36,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-22 03:41:36,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2020-12-22 03:41:36,038 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 62 [2020-12-22 03:41:36,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:36,038 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2020-12-22 03:41:36,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 03:41:36,038 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2020-12-22 03:41:36,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 03:41:36,039 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:36,039 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:36,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:36,254 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:36,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:36,255 INFO L82 PathProgramCache]: Analyzing trace with hash 818230509, now seen corresponding path program 15 times [2020-12-22 03:41:36,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:36,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74096250] [2020-12-22 03:41:36,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:36,490 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:36,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74096250] [2020-12-22 03:41:36,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552998749] [2020-12-22 03:41:36,491 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 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 [2020-12-22 03:41:36,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-22 03:41:36,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:36,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 03:41:36,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:36,699 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:36,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:36,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 03:41:36,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293471453] [2020-12-22 03:41:36,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 03:41:36,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:36,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 03:41:36,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 03:41:36,702 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand 19 states. [2020-12-22 03:41:36,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:36,772 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2020-12-22 03:41:36,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 03:41:36,773 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 66 [2020-12-22 03:41:36,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:36,774 INFO L225 Difference]: With dead ends: 95 [2020-12-22 03:41:36,774 INFO L226 Difference]: Without dead ends: 91 [2020-12-22 03:41:36,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 03:41:36,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-22 03:41:36,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2020-12-22 03:41:36,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 03:41:36,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2020-12-22 03:41:36,779 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 66 [2020-12-22 03:41:36,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:36,779 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2020-12-22 03:41:36,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 03:41:36,780 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2020-12-22 03:41:36,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 03:41:36,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:36,781 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:36,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 03:41:36,995 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:36,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:36,997 INFO L82 PathProgramCache]: Analyzing trace with hash 305531099, now seen corresponding path program 16 times [2020-12-22 03:41:36,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:36,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650339326] [2020-12-22 03:41:36,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:37,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:37,250 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:37,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650339326] [2020-12-22 03:41:37,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821620019] [2020-12-22 03:41:37,251 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 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 [2020-12-22 03:41:37,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:41:37,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:37,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 03:41:37,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:37,428 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:37,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:37,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 03:41:37,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782426090] [2020-12-22 03:41:37,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 03:41:37,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:37,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 03:41:37,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 03:41:37,431 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand 20 states. [2020-12-22 03:41:37,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:37,502 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2020-12-22 03:41:37,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 03:41:37,503 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 70 [2020-12-22 03:41:37,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:37,504 INFO L225 Difference]: With dead ends: 100 [2020-12-22 03:41:37,504 INFO L226 Difference]: Without dead ends: 96 [2020-12-22 03:41:37,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 03:41:37,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-22 03:41:37,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2020-12-22 03:41:37,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-22 03:41:37,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 109 transitions. [2020-12-22 03:41:37,509 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 109 transitions. Word has length 70 [2020-12-22 03:41:37,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:37,509 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 109 transitions. [2020-12-22 03:41:37,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 03:41:37,509 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 109 transitions. [2020-12-22 03:41:37,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 03:41:37,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:37,510 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:37,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 03:41:37,723 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:37,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:37,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1713321417, now seen corresponding path program 17 times [2020-12-22 03:41:37,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:37,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244424898] [2020-12-22 03:41:37,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:37,989 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:37,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244424898] [2020-12-22 03:41:37,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447799838] [2020-12-22 03:41:37,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:38,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-22 03:41:38,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:38,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 03:41:38,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:38,177 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:38,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:38,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 03:41:38,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237938380] [2020-12-22 03:41:38,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 03:41:38,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:38,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 03:41:38,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 03:41:38,179 INFO L87 Difference]: Start difference. First operand 92 states and 109 transitions. Second operand 21 states. [2020-12-22 03:41:38,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:38,258 INFO L93 Difference]: Finished difference Result 105 states and 124 transitions. [2020-12-22 03:41:38,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 03:41:38,259 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 74 [2020-12-22 03:41:38,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:38,260 INFO L225 Difference]: With dead ends: 105 [2020-12-22 03:41:38,260 INFO L226 Difference]: Without dead ends: 101 [2020-12-22 03:41:38,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 03:41:38,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-22 03:41:38,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2020-12-22 03:41:38,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-22 03:41:38,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 115 transitions. [2020-12-22 03:41:38,265 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 115 transitions. Word has length 74 [2020-12-22 03:41:38,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:38,265 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 115 transitions. [2020-12-22 03:41:38,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 03:41:38,265 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 115 transitions. [2020-12-22 03:41:38,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 03:41:38,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:38,266 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:38,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 03:41:38,480 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:38,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:38,481 INFO L82 PathProgramCache]: Analyzing trace with hash 380386231, now seen corresponding path program 18 times [2020-12-22 03:41:38,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:38,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926968121] [2020-12-22 03:41:38,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:38,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:38,773 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:38,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926968121] [2020-12-22 03:41:38,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31491165] [2020-12-22 03:41:38,774 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:38,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-22 03:41:38,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:38,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 03:41:38,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:38,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:38,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 03:41:38,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518687506] [2020-12-22 03:41:38,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 03:41:38,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:38,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 03:41:38,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 03:41:38,990 INFO L87 Difference]: Start difference. First operand 97 states and 115 transitions. Second operand 22 states. [2020-12-22 03:41:39,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:39,071 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2020-12-22 03:41:39,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 03:41:39,071 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 78 [2020-12-22 03:41:39,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:39,072 INFO L225 Difference]: With dead ends: 110 [2020-12-22 03:41:39,072 INFO L226 Difference]: Without dead ends: 106 [2020-12-22 03:41:39,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 03:41:39,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-22 03:41:39,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2020-12-22 03:41:39,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-22 03:41:39,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 121 transitions. [2020-12-22 03:41:39,077 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 121 transitions. Word has length 78 [2020-12-22 03:41:39,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:39,077 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 121 transitions. [2020-12-22 03:41:39,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 03:41:39,078 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 121 transitions. [2020-12-22 03:41:39,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 03:41:39,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:39,078 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:39,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:39,292 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:39,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:39,293 INFO L82 PathProgramCache]: Analyzing trace with hash 206084773, now seen corresponding path program 19 times [2020-12-22 03:41:39,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:39,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580910586] [2020-12-22 03:41:39,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:39,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:39,575 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:39,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580910586] [2020-12-22 03:41:39,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903361692] [2020-12-22 03:41:39,576 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 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 [2020-12-22 03:41:39,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:39,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 03:41:39,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:39,795 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:39,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:39,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 03:41:39,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762387629] [2020-12-22 03:41:39,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 03:41:39,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:39,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 03:41:39,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 03:41:39,798 INFO L87 Difference]: Start difference. First operand 102 states and 121 transitions. Second operand 23 states. [2020-12-22 03:41:39,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:39,882 INFO L93 Difference]: Finished difference Result 115 states and 136 transitions. [2020-12-22 03:41:39,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 03:41:39,883 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 82 [2020-12-22 03:41:39,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:39,884 INFO L225 Difference]: With dead ends: 115 [2020-12-22 03:41:39,884 INFO L226 Difference]: Without dead ends: 111 [2020-12-22 03:41:39,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 03:41:39,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-22 03:41:39,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2020-12-22 03:41:39,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-22 03:41:39,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 127 transitions. [2020-12-22 03:41:39,889 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 127 transitions. Word has length 82 [2020-12-22 03:41:39,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:39,889 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 127 transitions. [2020-12-22 03:41:39,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 03:41:39,889 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 127 transitions. [2020-12-22 03:41:39,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 03:41:39,890 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:39,890 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:40,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:40,105 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:40,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:40,106 INFO L82 PathProgramCache]: Analyzing trace with hash 228577939, now seen corresponding path program 20 times [2020-12-22 03:41:40,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:40,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293458436] [2020-12-22 03:41:40,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:40,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:40,458 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:40,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293458436] [2020-12-22 03:41:40,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217532911] [2020-12-22 03:41:40,459 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 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 [2020-12-22 03:41:40,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:41:40,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:40,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 03:41:40,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:40,678 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:40,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:40,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 03:41:40,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207296723] [2020-12-22 03:41:40,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 03:41:40,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:40,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 03:41:40,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 03:41:40,681 INFO L87 Difference]: Start difference. First operand 107 states and 127 transitions. Second operand 24 states. [2020-12-22 03:41:40,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:40,776 INFO L93 Difference]: Finished difference Result 120 states and 142 transitions. [2020-12-22 03:41:40,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 03:41:40,777 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 86 [2020-12-22 03:41:40,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:40,778 INFO L225 Difference]: With dead ends: 120 [2020-12-22 03:41:40,778 INFO L226 Difference]: Without dead ends: 116 [2020-12-22 03:41:40,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 03:41:40,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-22 03:41:40,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2020-12-22 03:41:40,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-22 03:41:40,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2020-12-22 03:41:40,783 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 86 [2020-12-22 03:41:40,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:40,783 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2020-12-22 03:41:40,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 03:41:40,783 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2020-12-22 03:41:40,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 03:41:40,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:40,784 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:40,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 03:41:40,999 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:40,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:41,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1617075327, now seen corresponding path program 21 times [2020-12-22 03:41:41,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:41,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176908442] [2020-12-22 03:41:41,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:41,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:41,417 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:41,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176908442] [2020-12-22 03:41:41,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105704772] [2020-12-22 03:41:41,418 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 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 [2020-12-22 03:41:41,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-22 03:41:41,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:41,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 03:41:41,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:41,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:41,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 03:41:41,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750330185] [2020-12-22 03:41:41,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 03:41:41,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:41,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 03:41:41,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 03:41:41,705 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand 25 states. [2020-12-22 03:41:41,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:41,828 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2020-12-22 03:41:41,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 03:41:41,829 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 90 [2020-12-22 03:41:41,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:41,830 INFO L225 Difference]: With dead ends: 125 [2020-12-22 03:41:41,830 INFO L226 Difference]: Without dead ends: 121 [2020-12-22 03:41:41,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 03:41:41,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-22 03:41:41,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2020-12-22 03:41:41,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-22 03:41:41,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 139 transitions. [2020-12-22 03:41:41,836 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 139 transitions. Word has length 90 [2020-12-22 03:41:41,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:41,836 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 139 transitions. [2020-12-22 03:41:41,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 03:41:41,836 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 139 transitions. [2020-12-22 03:41:41,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 03:41:41,837 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:41,838 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:42,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 03:41:42,054 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:42,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:42,054 INFO L82 PathProgramCache]: Analyzing trace with hash -445854353, now seen corresponding path program 22 times [2020-12-22 03:41:42,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:42,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021973778] [2020-12-22 03:41:42,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:42,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:42,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021973778] [2020-12-22 03:41:42,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631447749] [2020-12-22 03:41:42,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:42,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:41:42,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:42,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 03:41:42,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:42,670 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:42,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:42,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-22 03:41:42,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146157498] [2020-12-22 03:41:42,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 03:41:42,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:42,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 03:41:42,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 03:41:42,673 INFO L87 Difference]: Start difference. First operand 117 states and 139 transitions. Second operand 26 states. [2020-12-22 03:41:42,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:42,770 INFO L93 Difference]: Finished difference Result 130 states and 154 transitions. [2020-12-22 03:41:42,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 03:41:42,771 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 94 [2020-12-22 03:41:42,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:42,772 INFO L225 Difference]: With dead ends: 130 [2020-12-22 03:41:42,772 INFO L226 Difference]: Without dead ends: 126 [2020-12-22 03:41:42,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 03:41:42,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-22 03:41:42,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 122. [2020-12-22 03:41:42,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-12-22 03:41:42,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2020-12-22 03:41:42,778 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 94 [2020-12-22 03:41:42,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:42,778 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2020-12-22 03:41:42,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 03:41:42,778 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2020-12-22 03:41:42,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 03:41:42,779 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:42,780 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:42,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:42,994 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:42,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:42,995 INFO L82 PathProgramCache]: Analyzing trace with hash -2139516835, now seen corresponding path program 23 times [2020-12-22 03:41:42,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:42,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877031638] [2020-12-22 03:41:42,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:43,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:43,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877031638] [2020-12-22 03:41:43,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203333536] [2020-12-22 03:41:43,416 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 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 [2020-12-22 03:41:43,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-22 03:41:43,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:43,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 03:41:43,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:43,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:43,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:43,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-22 03:41:43,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629719768] [2020-12-22 03:41:43,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 03:41:43,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:43,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 03:41:43,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 03:41:43,660 INFO L87 Difference]: Start difference. First operand 122 states and 145 transitions. Second operand 27 states. [2020-12-22 03:41:43,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:43,762 INFO L93 Difference]: Finished difference Result 135 states and 160 transitions. [2020-12-22 03:41:43,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 03:41:43,762 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 98 [2020-12-22 03:41:43,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:43,764 INFO L225 Difference]: With dead ends: 135 [2020-12-22 03:41:43,764 INFO L226 Difference]: Without dead ends: 131 [2020-12-22 03:41:43,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 03:41:43,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-22 03:41:43,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2020-12-22 03:41:43,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-22 03:41:43,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 151 transitions. [2020-12-22 03:41:43,769 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 151 transitions. Word has length 98 [2020-12-22 03:41:43,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:43,769 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 151 transitions. [2020-12-22 03:41:43,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 03:41:43,770 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 151 transitions. [2020-12-22 03:41:43,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-22 03:41:43,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:43,771 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:43,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 03:41:43,987 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:43,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:43,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1886334027, now seen corresponding path program 24 times [2020-12-22 03:41:43,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:43,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080515318] [2020-12-22 03:41:43,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:44,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080515318] [2020-12-22 03:41:44,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138841610] [2020-12-22 03:41:44,472 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 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 [2020-12-22 03:41:44,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-22 03:41:44,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:44,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 03:41:44,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:44,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:44,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:44,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-22 03:41:44,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082613777] [2020-12-22 03:41:44,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 03:41:44,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:44,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 03:41:44,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 03:41:44,733 INFO L87 Difference]: Start difference. First operand 127 states and 151 transitions. Second operand 28 states. [2020-12-22 03:41:44,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:44,838 INFO L93 Difference]: Finished difference Result 140 states and 166 transitions. [2020-12-22 03:41:44,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 03:41:44,839 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 102 [2020-12-22 03:41:44,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:44,841 INFO L225 Difference]: With dead ends: 140 [2020-12-22 03:41:44,841 INFO L226 Difference]: Without dead ends: 136 [2020-12-22 03:41:44,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 03:41:44,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-22 03:41:44,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2020-12-22 03:41:44,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-22 03:41:44,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 157 transitions. [2020-12-22 03:41:44,846 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 157 transitions. Word has length 102 [2020-12-22 03:41:44,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:44,847 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 157 transitions. [2020-12-22 03:41:44,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 03:41:44,847 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 157 transitions. [2020-12-22 03:41:44,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 03:41:44,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:44,848 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:45,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:45,063 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:45,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:45,063 INFO L82 PathProgramCache]: Analyzing trace with hash -214359751, now seen corresponding path program 25 times [2020-12-22 03:41:45,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:45,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901688017] [2020-12-22 03:41:45,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:45,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:45,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901688017] [2020-12-22 03:41:45,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129409540] [2020-12-22 03:41:45,585 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 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 [2020-12-22 03:41:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:45,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 03:41:45,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:45,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:45,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:45,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-22 03:41:45,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542525398] [2020-12-22 03:41:45,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 03:41:45,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:45,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 03:41:45,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 03:41:45,818 INFO L87 Difference]: Start difference. First operand 132 states and 157 transitions. Second operand 29 states. [2020-12-22 03:41:45,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:45,932 INFO L93 Difference]: Finished difference Result 145 states and 172 transitions. [2020-12-22 03:41:45,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 03:41:45,933 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 106 [2020-12-22 03:41:45,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:45,934 INFO L225 Difference]: With dead ends: 145 [2020-12-22 03:41:45,934 INFO L226 Difference]: Without dead ends: 141 [2020-12-22 03:41:45,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 03:41:45,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-22 03:41:45,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 137. [2020-12-22 03:41:45,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-22 03:41:45,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 163 transitions. [2020-12-22 03:41:45,939 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 163 transitions. Word has length 106 [2020-12-22 03:41:45,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:45,940 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 163 transitions. [2020-12-22 03:41:45,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 03:41:45,940 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 163 transitions. [2020-12-22 03:41:45,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 03:41:45,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:45,941 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:46,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 03:41:46,156 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:46,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:46,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1694691111, now seen corresponding path program 26 times [2020-12-22 03:41:46,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:46,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592035833] [2020-12-22 03:41:46,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:46,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:46,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:46,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592035833] [2020-12-22 03:41:46,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336839480] [2020-12-22 03:41:46,769 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 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 [2020-12-22 03:41:46,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:41:46,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:46,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 03:41:46,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:46,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:46,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-22 03:41:46,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452991627] [2020-12-22 03:41:46,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 03:41:46,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:46,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 03:41:46,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 03:41:46,984 INFO L87 Difference]: Start difference. First operand 137 states and 163 transitions. Second operand 30 states. [2020-12-22 03:41:47,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:47,081 INFO L93 Difference]: Finished difference Result 150 states and 178 transitions. [2020-12-22 03:41:47,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 03:41:47,082 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 110 [2020-12-22 03:41:47,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:47,083 INFO L225 Difference]: With dead ends: 150 [2020-12-22 03:41:47,083 INFO L226 Difference]: Without dead ends: 146 [2020-12-22 03:41:47,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 03:41:47,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-22 03:41:47,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 142. [2020-12-22 03:41:47,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-22 03:41:47,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 169 transitions. [2020-12-22 03:41:47,088 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 169 transitions. Word has length 110 [2020-12-22 03:41:47,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:47,088 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 169 transitions. [2020-12-22 03:41:47,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 03:41:47,088 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 169 transitions. [2020-12-22 03:41:47,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 03:41:47,089 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:47,089 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:47,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 03:41:47,304 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:47,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:47,305 INFO L82 PathProgramCache]: Analyzing trace with hash 540546581, now seen corresponding path program 27 times [2020-12-22 03:41:47,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:47,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382455504] [2020-12-22 03:41:47,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:47,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:47,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382455504] [2020-12-22 03:41:47,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829003979] [2020-12-22 03:41:47,908 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 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 [2020-12-22 03:41:48,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-22 03:41:48,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:48,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 03:41:48,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:48,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:48,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:48,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-22 03:41:48,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441703795] [2020-12-22 03:41:48,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 03:41:48,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:48,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 03:41:48,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 03:41:48,175 INFO L87 Difference]: Start difference. First operand 142 states and 169 transitions. Second operand 31 states. [2020-12-22 03:41:48,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:48,284 INFO L93 Difference]: Finished difference Result 155 states and 184 transitions. [2020-12-22 03:41:48,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 03:41:48,285 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 114 [2020-12-22 03:41:48,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:48,286 INFO L225 Difference]: With dead ends: 155 [2020-12-22 03:41:48,286 INFO L226 Difference]: Without dead ends: 151 [2020-12-22 03:41:48,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 03:41:48,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-22 03:41:48,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2020-12-22 03:41:48,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-22 03:41:48,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 175 transitions. [2020-12-22 03:41:48,292 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 175 transitions. Word has length 114 [2020-12-22 03:41:48,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:48,292 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 175 transitions. [2020-12-22 03:41:48,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 03:41:48,292 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 175 transitions. [2020-12-22 03:41:48,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 03:41:48,293 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:48,293 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:48,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 03:41:48,507 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:48,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:48,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1568937475, now seen corresponding path program 28 times [2020-12-22 03:41:48,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:48,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103260940] [2020-12-22 03:41:48,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:49,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:49,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103260940] [2020-12-22 03:41:49,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421150889] [2020-12-22 03:41:49,082 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 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 [2020-12-22 03:41:49,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:41:49,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:49,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 03:41:49,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:49,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:49,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:49,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-22 03:41:49,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752033774] [2020-12-22 03:41:49,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 03:41:49,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:49,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 03:41:49,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 03:41:49,334 INFO L87 Difference]: Start difference. First operand 147 states and 175 transitions. Second operand 32 states. [2020-12-22 03:41:49,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:49,480 INFO L93 Difference]: Finished difference Result 160 states and 190 transitions. [2020-12-22 03:41:49,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 03:41:49,480 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 118 [2020-12-22 03:41:49,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:49,482 INFO L225 Difference]: With dead ends: 160 [2020-12-22 03:41:49,482 INFO L226 Difference]: Without dead ends: 156 [2020-12-22 03:41:49,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 03:41:49,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-12-22 03:41:49,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2020-12-22 03:41:49,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-22 03:41:49,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 181 transitions. [2020-12-22 03:41:49,487 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 181 transitions. Word has length 118 [2020-12-22 03:41:49,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:49,488 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 181 transitions. [2020-12-22 03:41:49,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 03:41:49,488 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 181 transitions. [2020-12-22 03:41:49,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 03:41:49,489 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:49,489 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:49,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 03:41:49,705 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:49,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:49,706 INFO L82 PathProgramCache]: Analyzing trace with hash 332558065, now seen corresponding path program 29 times [2020-12-22 03:41:49,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:49,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951084365] [2020-12-22 03:41:49,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:49,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:50,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:50,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951084365] [2020-12-22 03:41:50,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112069816] [2020-12-22 03:41:50,359 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 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 [2020-12-22 03:41:50,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-22 03:41:50,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:50,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 03:41:50,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:50,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:50,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:50,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-22 03:41:50,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020652155] [2020-12-22 03:41:50,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 03:41:50,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:50,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 03:41:50,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 03:41:50,649 INFO L87 Difference]: Start difference. First operand 152 states and 181 transitions. Second operand 33 states. [2020-12-22 03:41:50,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:50,774 INFO L93 Difference]: Finished difference Result 165 states and 196 transitions. [2020-12-22 03:41:50,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 03:41:50,775 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 122 [2020-12-22 03:41:50,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:50,776 INFO L225 Difference]: With dead ends: 165 [2020-12-22 03:41:50,776 INFO L226 Difference]: Without dead ends: 161 [2020-12-22 03:41:50,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 03:41:50,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-12-22 03:41:50,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 157. [2020-12-22 03:41:50,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-22 03:41:50,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 187 transitions. [2020-12-22 03:41:50,782 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 187 transitions. Word has length 122 [2020-12-22 03:41:50,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:50,783 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 187 transitions. [2020-12-22 03:41:50,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 03:41:50,783 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 187 transitions. [2020-12-22 03:41:50,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-22 03:41:50,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:50,784 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:50,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:50,999 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:50,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:50,999 INFO L82 PathProgramCache]: Analyzing trace with hash -665935649, now seen corresponding path program 30 times [2020-12-22 03:41:51,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:51,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055025512] [2020-12-22 03:41:51,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:51,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:51,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:51,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055025512] [2020-12-22 03:41:51,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495231482] [2020-12-22 03:41:51,724 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 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 [2020-12-22 03:41:51,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-22 03:41:51,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:51,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 03:41:51,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:52,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:52,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:52,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-22 03:41:52,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900305579] [2020-12-22 03:41:52,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 03:41:52,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:52,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 03:41:52,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 03:41:52,011 INFO L87 Difference]: Start difference. First operand 157 states and 187 transitions. Second operand 34 states. [2020-12-22 03:41:52,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:52,173 INFO L93 Difference]: Finished difference Result 170 states and 202 transitions. [2020-12-22 03:41:52,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 03:41:52,174 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 126 [2020-12-22 03:41:52,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:52,175 INFO L225 Difference]: With dead ends: 170 [2020-12-22 03:41:52,175 INFO L226 Difference]: Without dead ends: 166 [2020-12-22 03:41:52,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 03:41:52,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-22 03:41:52,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2020-12-22 03:41:52,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-22 03:41:52,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 193 transitions. [2020-12-22 03:41:52,181 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 193 transitions. Word has length 126 [2020-12-22 03:41:52,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:52,182 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 193 transitions. [2020-12-22 03:41:52,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 03:41:52,182 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 193 transitions. [2020-12-22 03:41:52,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 03:41:52,183 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:52,183 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:52,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:52,396 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:52,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:52,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1100731443, now seen corresponding path program 31 times [2020-12-22 03:41:52,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:52,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705785699] [2020-12-22 03:41:52,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:52,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:53,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705785699] [2020-12-22 03:41:53,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961582102] [2020-12-22 03:41:53,167 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 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 [2020-12-22 03:41:53,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:53,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 03:41:53,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:53,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:53,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:53,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-22 03:41:53,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743355396] [2020-12-22 03:41:53,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 03:41:53,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:53,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 03:41:53,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 03:41:53,433 INFO L87 Difference]: Start difference. First operand 162 states and 193 transitions. Second operand 35 states. [2020-12-22 03:41:53,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:53,583 INFO L93 Difference]: Finished difference Result 175 states and 208 transitions. [2020-12-22 03:41:53,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 03:41:53,584 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 130 [2020-12-22 03:41:53,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:53,586 INFO L225 Difference]: With dead ends: 175 [2020-12-22 03:41:53,586 INFO L226 Difference]: Without dead ends: 171 [2020-12-22 03:41:53,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 03:41:53,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-12-22 03:41:53,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2020-12-22 03:41:53,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-22 03:41:53,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 199 transitions. [2020-12-22 03:41:53,592 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 199 transitions. Word has length 130 [2020-12-22 03:41:53,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:53,592 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 199 transitions. [2020-12-22 03:41:53,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 03:41:53,593 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 199 transitions. [2020-12-22 03:41:53,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 03:41:53,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:53,594 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:53,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:53,809 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:53,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:53,810 INFO L82 PathProgramCache]: Analyzing trace with hash 935235515, now seen corresponding path program 32 times [2020-12-22 03:41:53,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:53,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047346167] [2020-12-22 03:41:53,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:53,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:54,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:54,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047346167] [2020-12-22 03:41:54,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369322308] [2020-12-22 03:41:54,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:54,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:41:54,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:54,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 03:41:54,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:54,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:54,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:54,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-22 03:41:54,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253215617] [2020-12-22 03:41:54,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 03:41:54,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:54,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 03:41:54,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 03:41:54,832 INFO L87 Difference]: Start difference. First operand 167 states and 199 transitions. Second operand 36 states. [2020-12-22 03:41:54,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:54,973 INFO L93 Difference]: Finished difference Result 180 states and 214 transitions. [2020-12-22 03:41:54,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 03:41:54,973 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 134 [2020-12-22 03:41:54,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:54,975 INFO L225 Difference]: With dead ends: 180 [2020-12-22 03:41:54,975 INFO L226 Difference]: Without dead ends: 176 [2020-12-22 03:41:54,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 03:41:54,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-12-22 03:41:54,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2020-12-22 03:41:54,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-22 03:41:54,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 205 transitions. [2020-12-22 03:41:54,981 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 205 transitions. Word has length 134 [2020-12-22 03:41:54,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:54,982 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 205 transitions. [2020-12-22 03:41:54,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 03:41:54,982 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 205 transitions. [2020-12-22 03:41:54,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 03:41:54,983 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:54,983 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:55,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 03:41:55,193 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:55,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:55,194 INFO L82 PathProgramCache]: Analyzing trace with hash -196522839, now seen corresponding path program 33 times [2020-12-22 03:41:55,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:55,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299454323] [2020-12-22 03:41:55,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:55,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:55,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:55,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299454323] [2020-12-22 03:41:55,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611680731] [2020-12-22 03:41:55,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 03:41:56,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-12-22 03:41:56,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:56,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 03:41:56,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:56,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:56,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:56,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-22 03:41:56,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893814239] [2020-12-22 03:41:56,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 03:41:56,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:56,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 03:41:56,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 03:41:56,310 INFO L87 Difference]: Start difference. First operand 172 states and 205 transitions. Second operand 37 states. [2020-12-22 03:41:56,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:56,469 INFO L93 Difference]: Finished difference Result 185 states and 220 transitions. [2020-12-22 03:41:56,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 03:41:56,470 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 138 [2020-12-22 03:41:56,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:56,471 INFO L225 Difference]: With dead ends: 185 [2020-12-22 03:41:56,471 INFO L226 Difference]: Without dead ends: 181 [2020-12-22 03:41:56,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 03:41:56,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-12-22 03:41:56,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2020-12-22 03:41:56,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-22 03:41:56,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 211 transitions. [2020-12-22 03:41:56,477 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 211 transitions. Word has length 138 [2020-12-22 03:41:56,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:56,478 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 211 transitions. [2020-12-22 03:41:56,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 03:41:56,478 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 211 transitions. [2020-12-22 03:41:56,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-22 03:41:56,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:56,479 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:56,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:56,694 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:56,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:56,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1037049193, now seen corresponding path program 34 times [2020-12-22 03:41:56,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:56,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695994747] [2020-12-22 03:41:56,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:56,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:57,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:57,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695994747] [2020-12-22 03:41:57,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78061533] [2020-12-22 03:41:57,557 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 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 [2020-12-22 03:41:57,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:41:57,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:57,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 03:41:57,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:57,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:57,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-22 03:41:57,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987447439] [2020-12-22 03:41:57,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 03:41:57,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:57,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 03:41:57,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 03:41:57,835 INFO L87 Difference]: Start difference. First operand 177 states and 211 transitions. Second operand 38 states. [2020-12-22 03:41:57,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:57,975 INFO L93 Difference]: Finished difference Result 190 states and 226 transitions. [2020-12-22 03:41:57,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 03:41:57,976 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 142 [2020-12-22 03:41:57,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:57,977 INFO L225 Difference]: With dead ends: 190 [2020-12-22 03:41:57,977 INFO L226 Difference]: Without dead ends: 186 [2020-12-22 03:41:57,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 03:41:57,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-12-22 03:41:57,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 182. [2020-12-22 03:41:57,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-22 03:41:57,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 217 transitions. [2020-12-22 03:41:57,983 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 217 transitions. Word has length 142 [2020-12-22 03:41:57,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:57,983 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 217 transitions. [2020-12-22 03:41:57,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 03:41:57,984 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 217 transitions. [2020-12-22 03:41:57,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-22 03:41:57,984 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:57,985 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:58,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 03:41:58,199 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:58,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:58,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1843253637, now seen corresponding path program 35 times [2020-12-22 03:41:58,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:58,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666631947] [2020-12-22 03:41:58,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:59,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:59,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666631947] [2020-12-22 03:41:59,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469819386] [2020-12-22 03:41:59,068 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 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 [2020-12-22 03:41:59,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-22 03:41:59,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:59,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 03:41:59,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:59,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:59,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-22 03:41:59,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540614762] [2020-12-22 03:41:59,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 03:41:59,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:59,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 03:41:59,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 03:41:59,378 INFO L87 Difference]: Start difference. First operand 182 states and 217 transitions. Second operand 39 states. [2020-12-22 03:41:59,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:59,534 INFO L93 Difference]: Finished difference Result 195 states and 232 transitions. [2020-12-22 03:41:59,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 03:41:59,535 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 146 [2020-12-22 03:41:59,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:59,536 INFO L225 Difference]: With dead ends: 195 [2020-12-22 03:41:59,536 INFO L226 Difference]: Without dead ends: 191 [2020-12-22 03:41:59,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 03:41:59,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-12-22 03:41:59,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 187. [2020-12-22 03:41:59,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-22 03:41:59,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 223 transitions. [2020-12-22 03:41:59,543 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 223 transitions. Word has length 146 [2020-12-22 03:41:59,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:59,543 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 223 transitions. [2020-12-22 03:41:59,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 03:41:59,543 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 223 transitions. [2020-12-22 03:41:59,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-22 03:41:59,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:59,544 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:59,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:59,758 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:59,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:59,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1577150093, now seen corresponding path program 36 times [2020-12-22 03:41:59,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:59,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323919226] [2020-12-22 03:41:59,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:00,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:00,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323919226] [2020-12-22 03:42:00,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517095147] [2020-12-22 03:42:00,768 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 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 [2020-12-22 03:42:00,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-22 03:42:00,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:00,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 03:42:00,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:01,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:01,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:01,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-22 03:42:01,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225527513] [2020-12-22 03:42:01,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 03:42:01,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:01,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 03:42:01,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 03:42:01,122 INFO L87 Difference]: Start difference. First operand 187 states and 223 transitions. Second operand 40 states. [2020-12-22 03:42:01,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:01,311 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2020-12-22 03:42:01,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 03:42:01,312 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 150 [2020-12-22 03:42:01,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:01,313 INFO L225 Difference]: With dead ends: 200 [2020-12-22 03:42:01,314 INFO L226 Difference]: Without dead ends: 196 [2020-12-22 03:42:01,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 03:42:01,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-12-22 03:42:01,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 192. [2020-12-22 03:42:01,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-12-22 03:42:01,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 229 transitions. [2020-12-22 03:42:01,319 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 229 transitions. Word has length 150 [2020-12-22 03:42:01,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:01,320 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 229 transitions. [2020-12-22 03:42:01,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 03:42:01,320 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 229 transitions. [2020-12-22 03:42:01,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-22 03:42:01,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:01,321 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:01,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 03:42:01,535 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:01,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:01,535 INFO L82 PathProgramCache]: Analyzing trace with hash -948061599, now seen corresponding path program 37 times [2020-12-22 03:42:01,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:01,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781687941] [2020-12-22 03:42:01,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:01,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:02,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:02,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781687941] [2020-12-22 03:42:02,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743612259] [2020-12-22 03:42:02,588 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:02,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:02,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 03:42:02,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:02,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:02,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-22 03:42:02,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788817974] [2020-12-22 03:42:02,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 03:42:02,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:02,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 03:42:02,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 03:42:02,887 INFO L87 Difference]: Start difference. First operand 192 states and 229 transitions. Second operand 41 states. [2020-12-22 03:42:03,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:03,084 INFO L93 Difference]: Finished difference Result 205 states and 244 transitions. [2020-12-22 03:42:03,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 03:42:03,085 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 154 [2020-12-22 03:42:03,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:03,086 INFO L225 Difference]: With dead ends: 205 [2020-12-22 03:42:03,086 INFO L226 Difference]: Without dead ends: 201 [2020-12-22 03:42:03,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 03:42:03,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-12-22 03:42:03,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 197. [2020-12-22 03:42:03,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-12-22 03:42:03,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 235 transitions. [2020-12-22 03:42:03,092 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 235 transitions. Word has length 154 [2020-12-22 03:42:03,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:03,092 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 235 transitions. [2020-12-22 03:42:03,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 03:42:03,093 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 235 transitions. [2020-12-22 03:42:03,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-22 03:42:03,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:03,094 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:03,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 03:42:03,307 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:03,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:03,308 INFO L82 PathProgramCache]: Analyzing trace with hash -444156849, now seen corresponding path program 38 times [2020-12-22 03:42:03,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:03,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666421246] [2020-12-22 03:42:03,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:04,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666421246] [2020-12-22 03:42:04,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832767038] [2020-12-22 03:42:04,391 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 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 [2020-12-22 03:42:04,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:42:04,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:04,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 03:42:04,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:04,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:04,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-22 03:42:04,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864378063] [2020-12-22 03:42:04,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 03:42:04,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:04,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 03:42:04,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 03:42:04,742 INFO L87 Difference]: Start difference. First operand 197 states and 235 transitions. Second operand 42 states. [2020-12-22 03:42:04,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:04,911 INFO L93 Difference]: Finished difference Result 210 states and 250 transitions. [2020-12-22 03:42:04,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 03:42:04,912 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 158 [2020-12-22 03:42:04,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:04,913 INFO L225 Difference]: With dead ends: 210 [2020-12-22 03:42:04,913 INFO L226 Difference]: Without dead ends: 206 [2020-12-22 03:42:04,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 03:42:04,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-12-22 03:42:04,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 202. [2020-12-22 03:42:04,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-12-22 03:42:04,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 241 transitions. [2020-12-22 03:42:04,919 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 241 transitions. Word has length 158 [2020-12-22 03:42:04,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:04,919 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 241 transitions. [2020-12-22 03:42:04,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 03:42:04,919 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 241 transitions. [2020-12-22 03:42:04,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-12-22 03:42:04,920 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:04,921 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:05,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 03:42:05,136 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:05,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:05,136 INFO L82 PathProgramCache]: Analyzing trace with hash -2121988291, now seen corresponding path program 39 times [2020-12-22 03:42:05,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:05,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830037684] [2020-12-22 03:42:05,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:05,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:06,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830037684] [2020-12-22 03:42:06,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8365323] [2020-12-22 03:42:06,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 03:42:06,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2020-12-22 03:42:06,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:06,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 03:42:06,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:06,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:06,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:06,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-22 03:42:06,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767989386] [2020-12-22 03:42:06,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 03:42:06,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:06,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 03:42:06,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 03:42:06,630 INFO L87 Difference]: Start difference. First operand 202 states and 241 transitions. Second operand 43 states. [2020-12-22 03:42:06,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:06,848 INFO L93 Difference]: Finished difference Result 215 states and 256 transitions. [2020-12-22 03:42:06,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 03:42:06,848 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 162 [2020-12-22 03:42:06,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:06,850 INFO L225 Difference]: With dead ends: 215 [2020-12-22 03:42:06,850 INFO L226 Difference]: Without dead ends: 211 [2020-12-22 03:42:06,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 03:42:06,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-12-22 03:42:06,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 207. [2020-12-22 03:42:06,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-12-22 03:42:06,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 247 transitions. [2020-12-22 03:42:06,857 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 247 transitions. Word has length 162 [2020-12-22 03:42:06,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:06,857 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 247 transitions. [2020-12-22 03:42:06,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 03:42:06,857 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 247 transitions. [2020-12-22 03:42:06,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 03:42:06,858 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:06,858 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:07,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 03:42:07,071 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:07,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:07,072 INFO L82 PathProgramCache]: Analyzing trace with hash 2133078827, now seen corresponding path program 40 times [2020-12-22 03:42:07,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:07,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215521954] [2020-12-22 03:42:07,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:07,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:08,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:08,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215521954] [2020-12-22 03:42:08,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20906077] [2020-12-22 03:42:08,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 03:42:08,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:42:08,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:08,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 03:42:08,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:08,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:08,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:08,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-22 03:42:08,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74455376] [2020-12-22 03:42:08,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 03:42:08,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:08,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 03:42:08,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 03:42:08,651 INFO L87 Difference]: Start difference. First operand 207 states and 247 transitions. Second operand 44 states. [2020-12-22 03:42:08,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:08,832 INFO L93 Difference]: Finished difference Result 220 states and 262 transitions. [2020-12-22 03:42:08,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 03:42:08,832 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 166 [2020-12-22 03:42:08,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:08,834 INFO L225 Difference]: With dead ends: 220 [2020-12-22 03:42:08,834 INFO L226 Difference]: Without dead ends: 216 [2020-12-22 03:42:08,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 03:42:08,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-12-22 03:42:08,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 212. [2020-12-22 03:42:08,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-12-22 03:42:08,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 253 transitions. [2020-12-22 03:42:08,839 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 253 transitions. Word has length 166 [2020-12-22 03:42:08,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:08,840 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 253 transitions. [2020-12-22 03:42:08,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 03:42:08,840 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 253 transitions. [2020-12-22 03:42:08,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-12-22 03:42:08,841 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:08,841 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:09,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:09,053 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:09,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:09,053 INFO L82 PathProgramCache]: Analyzing trace with hash 5224473, now seen corresponding path program 41 times [2020-12-22 03:42:09,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:09,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505198074] [2020-12-22 03:42:09,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:10,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:10,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505198074] [2020-12-22 03:42:10,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822945580] [2020-12-22 03:42:10,200 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 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 [2020-12-22 03:42:10,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-22 03:42:10,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:10,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 03:42:10,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:10,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:10,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:10,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-22 03:42:10,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916244256] [2020-12-22 03:42:10,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 03:42:10,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:10,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 03:42:10,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 03:42:10,588 INFO L87 Difference]: Start difference. First operand 212 states and 253 transitions. Second operand 45 states. [2020-12-22 03:42:10,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:10,816 INFO L93 Difference]: Finished difference Result 225 states and 268 transitions. [2020-12-22 03:42:10,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 03:42:10,817 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 170 [2020-12-22 03:42:10,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:10,818 INFO L225 Difference]: With dead ends: 225 [2020-12-22 03:42:10,818 INFO L226 Difference]: Without dead ends: 221 [2020-12-22 03:42:10,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 03:42:10,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-12-22 03:42:10,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 217. [2020-12-22 03:42:10,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-12-22 03:42:10,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 259 transitions. [2020-12-22 03:42:10,824 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 259 transitions. Word has length 170 [2020-12-22 03:42:10,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:10,824 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 259 transitions. [2020-12-22 03:42:10,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 03:42:10,824 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 259 transitions. [2020-12-22 03:42:10,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-12-22 03:42:10,825 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:10,825 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:11,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-22 03:42:11,039 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:11,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:11,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1160975879, now seen corresponding path program 42 times [2020-12-22 03:42:11,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:11,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520949268] [2020-12-22 03:42:11,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:12,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:12,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520949268] [2020-12-22 03:42:12,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520610322] [2020-12-22 03:42:12,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 03:42:12,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2020-12-22 03:42:12,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:12,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 03:42:12,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:12,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:12,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:12,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-22 03:42:12,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531583513] [2020-12-22 03:42:12,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 03:42:12,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:12,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 03:42:12,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 03:42:12,706 INFO L87 Difference]: Start difference. First operand 217 states and 259 transitions. Second operand 46 states. [2020-12-22 03:42:12,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:12,924 INFO L93 Difference]: Finished difference Result 230 states and 274 transitions. [2020-12-22 03:42:12,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-22 03:42:12,924 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 174 [2020-12-22 03:42:12,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:12,926 INFO L225 Difference]: With dead ends: 230 [2020-12-22 03:42:12,926 INFO L226 Difference]: Without dead ends: 226 [2020-12-22 03:42:12,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 03:42:12,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-12-22 03:42:12,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 222. [2020-12-22 03:42:12,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-12-22 03:42:12,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 265 transitions. [2020-12-22 03:42:12,931 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 265 transitions. Word has length 174 [2020-12-22 03:42:12,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:12,931 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 265 transitions. [2020-12-22 03:42:12,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 03:42:12,932 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 265 transitions. [2020-12-22 03:42:12,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-12-22 03:42:12,932 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:12,933 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:13,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:13,146 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:13,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:13,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1942369035, now seen corresponding path program 43 times [2020-12-22 03:42:13,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:13,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73759531] [2020-12-22 03:42:13,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:14,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:14,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73759531] [2020-12-22 03:42:14,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578470119] [2020-12-22 03:42:14,488 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 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 [2020-12-22 03:42:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:14,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 03:42:14,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:14,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:14,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:14,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-22 03:42:14,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215489044] [2020-12-22 03:42:14,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 03:42:14,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:14,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 03:42:14,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 03:42:14,817 INFO L87 Difference]: Start difference. First operand 222 states and 265 transitions. Second operand 47 states. [2020-12-22 03:42:15,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:15,073 INFO L93 Difference]: Finished difference Result 235 states and 280 transitions. [2020-12-22 03:42:15,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 03:42:15,073 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 178 [2020-12-22 03:42:15,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:15,074 INFO L225 Difference]: With dead ends: 235 [2020-12-22 03:42:15,074 INFO L226 Difference]: Without dead ends: 231 [2020-12-22 03:42:15,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 03:42:15,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-12-22 03:42:15,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 227. [2020-12-22 03:42:15,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-12-22 03:42:15,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 271 transitions. [2020-12-22 03:42:15,080 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 271 transitions. Word has length 178 [2020-12-22 03:42:15,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:15,080 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 271 transitions. [2020-12-22 03:42:15,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 03:42:15,081 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 271 transitions. [2020-12-22 03:42:15,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-12-22 03:42:15,082 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:15,082 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:15,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:15,297 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:15,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:15,298 INFO L82 PathProgramCache]: Analyzing trace with hash -233874205, now seen corresponding path program 44 times [2020-12-22 03:42:15,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:15,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672447391] [2020-12-22 03:42:15,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:15,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:16,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:16,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672447391] [2020-12-22 03:42:16,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646740013] [2020-12-22 03:42:16,644 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 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 [2020-12-22 03:42:16,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:42:16,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:16,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 03:42:16,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:17,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:17,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-22 03:42:17,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510921221] [2020-12-22 03:42:17,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 03:42:17,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:17,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 03:42:17,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 03:42:17,002 INFO L87 Difference]: Start difference. First operand 227 states and 271 transitions. Second operand 48 states. [2020-12-22 03:42:17,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:17,218 INFO L93 Difference]: Finished difference Result 240 states and 286 transitions. [2020-12-22 03:42:17,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 03:42:17,219 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 182 [2020-12-22 03:42:17,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:17,220 INFO L225 Difference]: With dead ends: 240 [2020-12-22 03:42:17,220 INFO L226 Difference]: Without dead ends: 236 [2020-12-22 03:42:17,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 03:42:17,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-12-22 03:42:17,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 232. [2020-12-22 03:42:17,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-12-22 03:42:17,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 277 transitions. [2020-12-22 03:42:17,226 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 277 transitions. Word has length 182 [2020-12-22 03:42:17,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:17,226 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 277 transitions. [2020-12-22 03:42:17,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 03:42:17,226 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 277 transitions. [2020-12-22 03:42:17,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-12-22 03:42:17,227 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:17,227 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:17,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-22 03:42:17,441 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:17,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:17,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1369392593, now seen corresponding path program 45 times [2020-12-22 03:42:17,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:17,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375217372] [2020-12-22 03:42:17,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:18,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:18,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375217372] [2020-12-22 03:42:18,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017977315] [2020-12-22 03:42:18,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 03:42:19,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2020-12-22 03:42:19,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:19,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 03:42:19,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:19,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:19,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:19,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-22 03:42:19,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707276232] [2020-12-22 03:42:19,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 03:42:19,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:19,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 03:42:19,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 03:42:19,300 INFO L87 Difference]: Start difference. First operand 232 states and 277 transitions. Second operand 49 states. [2020-12-22 03:42:19,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:19,548 INFO L93 Difference]: Finished difference Result 245 states and 292 transitions. [2020-12-22 03:42:19,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-22 03:42:19,548 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 186 [2020-12-22 03:42:19,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:19,550 INFO L225 Difference]: With dead ends: 245 [2020-12-22 03:42:19,550 INFO L226 Difference]: Without dead ends: 241 [2020-12-22 03:42:19,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 03:42:19,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-12-22 03:42:19,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 237. [2020-12-22 03:42:19,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-12-22 03:42:19,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 283 transitions. [2020-12-22 03:42:19,555 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 283 transitions. Word has length 186 [2020-12-22 03:42:19,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:19,555 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 283 transitions. [2020-12-22 03:42:19,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 03:42:19,556 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 283 transitions. [2020-12-22 03:42:19,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-12-22 03:42:19,557 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:19,557 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:19,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-22 03:42:19,773 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:19,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:19,773 INFO L82 PathProgramCache]: Analyzing trace with hash 605358015, now seen corresponding path program 46 times [2020-12-22 03:42:19,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:19,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378598252] [2020-12-22 03:42:19,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:19,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:21,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:21,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378598252] [2020-12-22 03:42:21,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691395095] [2020-12-22 03:42:21,327 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 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 [2020-12-22 03:42:21,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:42:21,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:21,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-22 03:42:21,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:21,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:21,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-22 03:42:21,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108647832] [2020-12-22 03:42:21,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 03:42:21,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:21,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 03:42:21,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 03:42:21,694 INFO L87 Difference]: Start difference. First operand 237 states and 283 transitions. Second operand 50 states. [2020-12-22 03:42:21,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:21,965 INFO L93 Difference]: Finished difference Result 250 states and 298 transitions. [2020-12-22 03:42:21,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-22 03:42:21,966 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 190 [2020-12-22 03:42:21,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:21,967 INFO L225 Difference]: With dead ends: 250 [2020-12-22 03:42:21,967 INFO L226 Difference]: Without dead ends: 246 [2020-12-22 03:42:21,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 03:42:21,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-12-22 03:42:21,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 242. [2020-12-22 03:42:21,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-12-22 03:42:21,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 289 transitions. [2020-12-22 03:42:21,972 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 289 transitions. Word has length 190 [2020-12-22 03:42:21,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:21,972 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 289 transitions. [2020-12-22 03:42:21,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 03:42:21,973 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 289 transitions. [2020-12-22 03:42:21,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-12-22 03:42:21,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:21,973 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:22,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-22 03:42:22,174 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:22,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:22,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1625039533, now seen corresponding path program 47 times [2020-12-22 03:42:22,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:22,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966966363] [2020-12-22 03:42:22,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:23,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966966363] [2020-12-22 03:42:23,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160377840] [2020-12-22 03:42:23,717 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 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 [2020-12-22 03:42:23,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2020-12-22 03:42:23,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:23,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 03:42:23,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:24,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:24,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-12-22 03:42:24,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060436375] [2020-12-22 03:42:24,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-22 03:42:24,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:24,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-22 03:42:24,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 03:42:24,148 INFO L87 Difference]: Start difference. First operand 242 states and 289 transitions. Second operand 51 states. [2020-12-22 03:42:24,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:24,431 INFO L93 Difference]: Finished difference Result 255 states and 304 transitions. [2020-12-22 03:42:24,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 03:42:24,431 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 194 [2020-12-22 03:42:24,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:24,432 INFO L225 Difference]: With dead ends: 255 [2020-12-22 03:42:24,432 INFO L226 Difference]: Without dead ends: 251 [2020-12-22 03:42:24,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 03:42:24,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-12-22 03:42:24,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 247. [2020-12-22 03:42:24,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-12-22 03:42:24,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 295 transitions. [2020-12-22 03:42:24,437 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 295 transitions. Word has length 194 [2020-12-22 03:42:24,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:24,438 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 295 transitions. [2020-12-22 03:42:24,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-22 03:42:24,438 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 295 transitions. [2020-12-22 03:42:24,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-12-22 03:42:24,439 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:24,439 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:24,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:24,640 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:24,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:24,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1570772635, now seen corresponding path program 48 times [2020-12-22 03:42:24,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:24,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674390251] [2020-12-22 03:42:24,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:26,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:26,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674390251] [2020-12-22 03:42:26,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763324386] [2020-12-22 03:42:26,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 03:42:26,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2020-12-22 03:42:26,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:26,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-22 03:42:26,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:26,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:26,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:26,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-22 03:42:26,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086364535] [2020-12-22 03:42:26,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-22 03:42:26,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:26,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-22 03:42:26,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 03:42:26,777 INFO L87 Difference]: Start difference. First operand 247 states and 295 transitions. Second operand 52 states. [2020-12-22 03:42:27,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:27,068 INFO L93 Difference]: Finished difference Result 260 states and 310 transitions. [2020-12-22 03:42:27,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-22 03:42:27,069 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 198 [2020-12-22 03:42:27,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:27,070 INFO L225 Difference]: With dead ends: 260 [2020-12-22 03:42:27,070 INFO L226 Difference]: Without dead ends: 256 [2020-12-22 03:42:27,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 03:42:27,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-12-22 03:42:27,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 252. [2020-12-22 03:42:27,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-12-22 03:42:27,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 301 transitions. [2020-12-22 03:42:27,076 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 301 transitions. Word has length 198 [2020-12-22 03:42:27,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:27,076 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 301 transitions. [2020-12-22 03:42:27,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-22 03:42:27,076 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 301 transitions. [2020-12-22 03:42:27,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-12-22 03:42:27,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:27,077 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:27,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-22 03:42:27,293 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:27,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:27,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1370725495, now seen corresponding path program 49 times [2020-12-22 03:42:27,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:27,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605063181] [2020-12-22 03:42:27,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:27,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:29,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605063181] [2020-12-22 03:42:29,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766605853] [2020-12-22 03:42:29,071 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 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 [2020-12-22 03:42:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:29,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 03:42:29,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:29,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:29,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:29,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-22 03:42:29,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842777444] [2020-12-22 03:42:29,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-22 03:42:29,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:29,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-22 03:42:29,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 03:42:29,488 INFO L87 Difference]: Start difference. First operand 252 states and 301 transitions. Second operand 53 states. [2020-12-22 03:42:29,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:29,759 INFO L93 Difference]: Finished difference Result 265 states and 316 transitions. [2020-12-22 03:42:29,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-22 03:42:29,759 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 202 [2020-12-22 03:42:29,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:29,761 INFO L225 Difference]: With dead ends: 265 [2020-12-22 03:42:29,762 INFO L226 Difference]: Without dead ends: 261 [2020-12-22 03:42:29,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 03:42:29,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-12-22 03:42:29,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 257. [2020-12-22 03:42:29,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-12-22 03:42:29,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 307 transitions. [2020-12-22 03:42:29,769 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 307 transitions. Word has length 202 [2020-12-22 03:42:29,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:29,769 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 307 transitions. [2020-12-22 03:42:29,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-22 03:42:29,769 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 307 transitions. [2020-12-22 03:42:29,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-12-22 03:42:29,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:29,771 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:29,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 03:42:29,985 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:29,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:29,986 INFO L82 PathProgramCache]: Analyzing trace with hash 84707703, now seen corresponding path program 50 times [2020-12-22 03:42:29,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:29,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889109543] [2020-12-22 03:42:29,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:30,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:31,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889109543] [2020-12-22 03:42:31,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232632123] [2020-12-22 03:42:31,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:31,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:42:31,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:31,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-22 03:42:32,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:32,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:32,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-12-22 03:42:32,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139600715] [2020-12-22 03:42:32,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-22 03:42:32,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:32,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-22 03:42:32,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 03:42:32,246 INFO L87 Difference]: Start difference. First operand 257 states and 307 transitions. Second operand 54 states. [2020-12-22 03:42:32,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:32,516 INFO L93 Difference]: Finished difference Result 270 states and 322 transitions. [2020-12-22 03:42:32,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-22 03:42:32,516 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 206 [2020-12-22 03:42:32,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:32,518 INFO L225 Difference]: With dead ends: 270 [2020-12-22 03:42:32,518 INFO L226 Difference]: Without dead ends: 266 [2020-12-22 03:42:32,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 03:42:32,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-12-22 03:42:32,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 262. [2020-12-22 03:42:32,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-12-22 03:42:32,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 313 transitions. [2020-12-22 03:42:32,523 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 313 transitions. Word has length 206 [2020-12-22 03:42:32,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:32,524 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 313 transitions. [2020-12-22 03:42:32,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-22 03:42:32,524 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 313 transitions. [2020-12-22 03:42:32,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-12-22 03:42:32,525 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:32,525 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:32,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:32,741 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:32,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:32,741 INFO L82 PathProgramCache]: Analyzing trace with hash 306972773, now seen corresponding path program 51 times [2020-12-22 03:42:32,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:32,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447906280] [2020-12-22 03:42:32,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:32,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:34,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:34,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447906280] [2020-12-22 03:42:34,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308854565] [2020-12-22 03:42:34,572 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 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 [2020-12-22 03:42:34,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2020-12-22 03:42:34,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:34,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-22 03:42:34,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:35,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:35,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-22 03:42:35,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53863063] [2020-12-22 03:42:35,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-22 03:42:35,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:35,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-22 03:42:35,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 03:42:35,036 INFO L87 Difference]: Start difference. First operand 262 states and 313 transitions. Second operand 55 states. [2020-12-22 03:42:35,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:35,373 INFO L93 Difference]: Finished difference Result 275 states and 328 transitions. [2020-12-22 03:42:35,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 03:42:35,374 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 210 [2020-12-22 03:42:35,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:35,375 INFO L225 Difference]: With dead ends: 275 [2020-12-22 03:42:35,375 INFO L226 Difference]: Without dead ends: 271 [2020-12-22 03:42:35,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 03:42:35,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-12-22 03:42:35,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 267. [2020-12-22 03:42:35,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-12-22 03:42:35,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 319 transitions. [2020-12-22 03:42:35,381 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 319 transitions. Word has length 210 [2020-12-22 03:42:35,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:35,382 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 319 transitions. [2020-12-22 03:42:35,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-22 03:42:35,382 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 319 transitions. [2020-12-22 03:42:35,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-12-22 03:42:35,383 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:35,383 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:35,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-12-22 03:42:35,598 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:35,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:35,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1689673811, now seen corresponding path program 52 times [2020-12-22 03:42:35,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:35,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087979947] [2020-12-22 03:42:35,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:35,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:37,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:37,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087979947] [2020-12-22 03:42:37,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305754734] [2020-12-22 03:42:37,602 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 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 [2020-12-22 03:42:37,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:42:37,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:37,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 03:42:37,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:38,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:38,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:38,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2020-12-22 03:42:38,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537700734] [2020-12-22 03:42:38,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-22 03:42:38,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:38,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-22 03:42:38,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 03:42:38,034 INFO L87 Difference]: Start difference. First operand 267 states and 319 transitions. Second operand 56 states. [2020-12-22 03:42:38,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:38,378 INFO L93 Difference]: Finished difference Result 280 states and 334 transitions. [2020-12-22 03:42:38,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-22 03:42:38,378 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 214 [2020-12-22 03:42:38,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:38,383 INFO L225 Difference]: With dead ends: 280 [2020-12-22 03:42:38,384 INFO L226 Difference]: Without dead ends: 276 [2020-12-22 03:42:38,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 03:42:38,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-12-22 03:42:38,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 272. [2020-12-22 03:42:38,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-12-22 03:42:38,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 325 transitions. [2020-12-22 03:42:38,389 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 325 transitions. Word has length 214 [2020-12-22 03:42:38,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:38,389 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 325 transitions. [2020-12-22 03:42:38,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-22 03:42:38,390 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 325 transitions. [2020-12-22 03:42:38,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-12-22 03:42:38,391 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:38,391 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:38,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:38,605 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:38,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:38,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1228345665, now seen corresponding path program 53 times [2020-12-22 03:42:38,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:38,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112202212] [2020-12-22 03:42:38,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:40,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:40,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112202212] [2020-12-22 03:42:40,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350548662] [2020-12-22 03:42:40,593 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 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 [2020-12-22 03:42:40,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2020-12-22 03:42:40,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:40,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-22 03:42:40,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:41,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:41,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:41,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2020-12-22 03:42:41,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471904180] [2020-12-22 03:42:41,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-22 03:42:41,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:41,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-22 03:42:41,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 03:42:41,076 INFO L87 Difference]: Start difference. First operand 272 states and 325 transitions. Second operand 57 states. [2020-12-22 03:42:41,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:41,435 INFO L93 Difference]: Finished difference Result 285 states and 340 transitions. [2020-12-22 03:42:41,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-22 03:42:41,436 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 218 [2020-12-22 03:42:41,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:41,437 INFO L225 Difference]: With dead ends: 285 [2020-12-22 03:42:41,437 INFO L226 Difference]: Without dead ends: 281 [2020-12-22 03:42:41,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 03:42:41,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-12-22 03:42:41,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 277. [2020-12-22 03:42:41,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-12-22 03:42:41,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 331 transitions. [2020-12-22 03:42:41,444 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 331 transitions. Word has length 218 [2020-12-22 03:42:41,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:41,444 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 331 transitions. [2020-12-22 03:42:41,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-22 03:42:41,444 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 331 transitions. [2020-12-22 03:42:41,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-12-22 03:42:41,446 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:41,446 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:41,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-12-22 03:42:41,661 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:41,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:41,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1426482385, now seen corresponding path program 54 times [2020-12-22 03:42:41,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:41,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241646927] [2020-12-22 03:42:41,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:41,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:43,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:43,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241646927] [2020-12-22 03:42:43,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7708328] [2020-12-22 03:42:43,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 03:42:43,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2020-12-22 03:42:43,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:43,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-22 03:42:43,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:44,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:44,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:44,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2020-12-22 03:42:44,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227464778] [2020-12-22 03:42:44,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-22 03:42:44,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:44,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-22 03:42:44,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 03:42:44,325 INFO L87 Difference]: Start difference. First operand 277 states and 331 transitions. Second operand 58 states. [2020-12-22 03:42:44,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:44,643 INFO L93 Difference]: Finished difference Result 290 states and 346 transitions. [2020-12-22 03:42:44,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-22 03:42:44,644 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 222 [2020-12-22 03:42:44,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:44,645 INFO L225 Difference]: With dead ends: 290 [2020-12-22 03:42:44,645 INFO L226 Difference]: Without dead ends: 286 [2020-12-22 03:42:44,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 03:42:44,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-12-22 03:42:44,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 282. [2020-12-22 03:42:44,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-12-22 03:42:44,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 337 transitions. [2020-12-22 03:42:44,652 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 337 transitions. Word has length 222 [2020-12-22 03:42:44,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:44,652 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 337 transitions. [2020-12-22 03:42:44,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-22 03:42:44,652 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 337 transitions. [2020-12-22 03:42:44,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-12-22 03:42:44,654 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:44,654 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:44,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-22 03:42:44,865 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:44,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:44,865 INFO L82 PathProgramCache]: Analyzing trace with hash -211190243, now seen corresponding path program 55 times [2020-12-22 03:42:44,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:44,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977960351] [2020-12-22 03:42:44,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:47,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:47,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977960351] [2020-12-22 03:42:47,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173818387] [2020-12-22 03:42:47,060 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 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 [2020-12-22 03:42:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:47,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-22 03:42:47,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:47,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:47,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:47,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2020-12-22 03:42:47,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198854143] [2020-12-22 03:42:47,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-22 03:42:47,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:47,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-22 03:42:47,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 03:42:47,521 INFO L87 Difference]: Start difference. First operand 282 states and 337 transitions. Second operand 59 states. [2020-12-22 03:42:47,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:47,830 INFO L93 Difference]: Finished difference Result 295 states and 352 transitions. [2020-12-22 03:42:47,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-22 03:42:47,833 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 226 [2020-12-22 03:42:47,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:47,834 INFO L225 Difference]: With dead ends: 295 [2020-12-22 03:42:47,834 INFO L226 Difference]: Without dead ends: 291 [2020-12-22 03:42:47,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 03:42:47,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-12-22 03:42:47,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 287. [2020-12-22 03:42:47,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-12-22 03:42:47,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 343 transitions. [2020-12-22 03:42:47,840 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 343 transitions. Word has length 226 [2020-12-22 03:42:47,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:47,840 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 343 transitions. [2020-12-22 03:42:47,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-22 03:42:47,840 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 343 transitions. [2020-12-22 03:42:47,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-12-22 03:42:47,842 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:47,842 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:48,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:48,057 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:48,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:48,057 INFO L82 PathProgramCache]: Analyzing trace with hash -365807093, now seen corresponding path program 56 times [2020-12-22 03:42:48,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:48,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194493322] [2020-12-22 03:42:48,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:48,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:50,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:50,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194493322] [2020-12-22 03:42:50,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253177126] [2020-12-22 03:42:50,368 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 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 [2020-12-22 03:42:50,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:42:50,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:50,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-22 03:42:50,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:50,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:50,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2020-12-22 03:42:50,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864459377] [2020-12-22 03:42:50,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-22 03:42:50,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:50,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-22 03:42:50,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 03:42:50,821 INFO L87 Difference]: Start difference. First operand 287 states and 343 transitions. Second operand 60 states. [2020-12-22 03:42:51,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:51,224 INFO L93 Difference]: Finished difference Result 300 states and 358 transitions. [2020-12-22 03:42:51,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-22 03:42:51,225 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 230 [2020-12-22 03:42:51,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:51,226 INFO L225 Difference]: With dead ends: 300 [2020-12-22 03:42:51,226 INFO L226 Difference]: Without dead ends: 296 [2020-12-22 03:42:51,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 03:42:51,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-12-22 03:42:51,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 292. [2020-12-22 03:42:51,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-12-22 03:42:51,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 349 transitions. [2020-12-22 03:42:51,237 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 349 transitions. Word has length 230 [2020-12-22 03:42:51,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:51,237 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 349 transitions. [2020-12-22 03:42:51,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-22 03:42:51,237 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 349 transitions. [2020-12-22 03:42:51,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-12-22 03:42:51,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:51,239 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:51,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-22 03:42:51,454 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:51,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:51,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1791013127, now seen corresponding path program 57 times [2020-12-22 03:42:51,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:51,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581319398] [2020-12-22 03:42:51,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:51,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:53,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:53,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581319398] [2020-12-22 03:42:53,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365858395] [2020-12-22 03:42:53,916 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 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 [2020-12-22 03:42:54,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2020-12-22 03:42:54,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:54,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-22 03:42:54,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:54,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:54,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:54,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2020-12-22 03:42:54,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603993555] [2020-12-22 03:42:54,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-22 03:42:54,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:54,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-22 03:42:54,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 03:42:54,494 INFO L87 Difference]: Start difference. First operand 292 states and 349 transitions. Second operand 61 states. [2020-12-22 03:42:54,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:54,876 INFO L93 Difference]: Finished difference Result 305 states and 364 transitions. [2020-12-22 03:42:54,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-22 03:42:54,877 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 234 [2020-12-22 03:42:54,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:54,878 INFO L225 Difference]: With dead ends: 305 [2020-12-22 03:42:54,878 INFO L226 Difference]: Without dead ends: 301 [2020-12-22 03:42:54,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 03:42:54,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-12-22 03:42:54,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 297. [2020-12-22 03:42:54,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-12-22 03:42:54,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 355 transitions. [2020-12-22 03:42:54,883 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 355 transitions. Word has length 234 [2020-12-22 03:42:54,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:54,884 INFO L481 AbstractCegarLoop]: Abstraction has 297 states and 355 transitions. [2020-12-22 03:42:54,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-22 03:42:54,884 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 355 transitions. [2020-12-22 03:42:54,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-12-22 03:42:54,885 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:54,886 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:55,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:55,099 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:55,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:55,100 INFO L82 PathProgramCache]: Analyzing trace with hash 414989543, now seen corresponding path program 58 times [2020-12-22 03:42:55,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:55,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422418609] [2020-12-22 03:42:55,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:57,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:57,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422418609] [2020-12-22 03:42:57,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620419683] [2020-12-22 03:42:57,586 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 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 [2020-12-22 03:42:57,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:42:57,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:57,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-22 03:42:57,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:58,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:58,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2020-12-22 03:42:58,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174896783] [2020-12-22 03:42:58,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-22 03:42:58,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:58,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-22 03:42:58,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 03:42:58,110 INFO L87 Difference]: Start difference. First operand 297 states and 355 transitions. Second operand 62 states. [2020-12-22 03:42:58,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:58,627 INFO L93 Difference]: Finished difference Result 310 states and 370 transitions. [2020-12-22 03:42:58,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-22 03:42:58,628 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 238 [2020-12-22 03:42:58,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:58,629 INFO L225 Difference]: With dead ends: 310 [2020-12-22 03:42:58,629 INFO L226 Difference]: Without dead ends: 306 [2020-12-22 03:42:58,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 03:42:58,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-12-22 03:42:58,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 302. [2020-12-22 03:42:58,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-12-22 03:42:58,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 361 transitions. [2020-12-22 03:42:58,636 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 361 transitions. Word has length 238 [2020-12-22 03:42:58,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:58,636 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 361 transitions. [2020-12-22 03:42:58,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-22 03:42:58,636 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 361 transitions. [2020-12-22 03:42:58,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-12-22 03:42:58,637 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:58,638 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:58,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-22 03:42:58,845 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:58,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:58,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1760263211, now seen corresponding path program 59 times [2020-12-22 03:42:58,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:58,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797405236] [2020-12-22 03:42:58,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:58,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:01,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797405236] [2020-12-22 03:43:01,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583642704] [2020-12-22 03:43:01,466 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 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 [2020-12-22 03:43:01,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2020-12-22 03:43:01,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:01,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-22 03:43:01,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:02,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:02,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2020-12-22 03:43:02,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391309416] [2020-12-22 03:43:02,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-22 03:43:02,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:02,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-22 03:43:02,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 03:43:02,024 INFO L87 Difference]: Start difference. First operand 302 states and 361 transitions. Second operand 63 states. [2020-12-22 03:43:02,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:02,435 INFO L93 Difference]: Finished difference Result 315 states and 376 transitions. [2020-12-22 03:43:02,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-22 03:43:02,436 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 242 [2020-12-22 03:43:02,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:02,437 INFO L225 Difference]: With dead ends: 315 [2020-12-22 03:43:02,437 INFO L226 Difference]: Without dead ends: 311 [2020-12-22 03:43:02,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 03:43:02,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-12-22 03:43:02,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 307. [2020-12-22 03:43:02,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-12-22 03:43:02,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 367 transitions. [2020-12-22 03:43:02,442 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 367 transitions. Word has length 242 [2020-12-22 03:43:02,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:02,442 INFO L481 AbstractCegarLoop]: Abstraction has 307 states and 367 transitions. [2020-12-22 03:43:02,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-22 03:43:02,443 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 367 transitions. [2020-12-22 03:43:02,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-12-22 03:43:02,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:02,444 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:02,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-22 03:43:02,658 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:02,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:02,659 INFO L82 PathProgramCache]: Analyzing trace with hash 284402627, now seen corresponding path program 60 times [2020-12-22 03:43:02,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:02,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082688276] [2020-12-22 03:43:02,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:02,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:05,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:05,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082688276] [2020-12-22 03:43:05,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008815832] [2020-12-22 03:43:05,394 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 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 [2020-12-22 03:43:05,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2020-12-22 03:43:05,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:05,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-22 03:43:05,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:05,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:05,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:05,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2020-12-22 03:43:05,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344412521] [2020-12-22 03:43:05,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-22 03:43:05,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:05,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-22 03:43:05,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 03:43:05,960 INFO L87 Difference]: Start difference. First operand 307 states and 367 transitions. Second operand 64 states. [2020-12-22 03:43:06,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:06,360 INFO L93 Difference]: Finished difference Result 320 states and 382 transitions. [2020-12-22 03:43:06,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-22 03:43:06,360 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 246 [2020-12-22 03:43:06,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:06,362 INFO L225 Difference]: With dead ends: 320 [2020-12-22 03:43:06,362 INFO L226 Difference]: Without dead ends: 316 [2020-12-22 03:43:06,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 03:43:06,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-12-22 03:43:06,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 312. [2020-12-22 03:43:06,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-12-22 03:43:06,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 373 transitions. [2020-12-22 03:43:06,367 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 373 transitions. Word has length 246 [2020-12-22 03:43:06,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:06,368 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 373 transitions. [2020-12-22 03:43:06,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-22 03:43:06,368 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 373 transitions. [2020-12-22 03:43:06,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-12-22 03:43:06,369 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:06,370 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:06,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:06,582 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:06,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:06,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1162157233, now seen corresponding path program 61 times [2020-12-22 03:43:06,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:06,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309847627] [2020-12-22 03:43:06,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:06,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:09,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:09,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309847627] [2020-12-22 03:43:09,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995122539] [2020-12-22 03:43:09,352 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 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 [2020-12-22 03:43:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:09,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-22 03:43:09,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:09,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:09,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:09,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2020-12-22 03:43:09,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449889609] [2020-12-22 03:43:09,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-22 03:43:09,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:09,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-22 03:43:09,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 03:43:09,893 INFO L87 Difference]: Start difference. First operand 312 states and 373 transitions. Second operand 65 states. [2020-12-22 03:43:10,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:10,258 INFO L93 Difference]: Finished difference Result 325 states and 388 transitions. [2020-12-22 03:43:10,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-22 03:43:10,259 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 250 [2020-12-22 03:43:10,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:10,260 INFO L225 Difference]: With dead ends: 325 [2020-12-22 03:43:10,260 INFO L226 Difference]: Without dead ends: 321 [2020-12-22 03:43:10,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 03:43:10,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-12-22 03:43:10,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 317. [2020-12-22 03:43:10,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-12-22 03:43:10,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 379 transitions. [2020-12-22 03:43:10,266 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 379 transitions. Word has length 250 [2020-12-22 03:43:10,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:10,266 INFO L481 AbstractCegarLoop]: Abstraction has 317 states and 379 transitions. [2020-12-22 03:43:10,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-22 03:43:10,266 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 379 transitions. [2020-12-22 03:43:10,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-12-22 03:43:10,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:10,268 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:10,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:10,482 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:10,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:10,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1858834785, now seen corresponding path program 62 times [2020-12-22 03:43:10,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:10,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617303970] [2020-12-22 03:43:10,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:13,389 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:13,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617303970] [2020-12-22 03:43:13,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104541177] [2020-12-22 03:43:13,389 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 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 [2020-12-22 03:43:13,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:43:13,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:13,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-22 03:43:13,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:13,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:13,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:13,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2020-12-22 03:43:13,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255230909] [2020-12-22 03:43:13,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-22 03:43:13,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:13,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-22 03:43:13,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-22 03:43:13,915 INFO L87 Difference]: Start difference. First operand 317 states and 379 transitions. Second operand 66 states. [2020-12-22 03:43:14,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:14,395 INFO L93 Difference]: Finished difference Result 330 states and 394 transitions. [2020-12-22 03:43:14,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-22 03:43:14,396 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 254 [2020-12-22 03:43:14,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:14,397 INFO L225 Difference]: With dead ends: 330 [2020-12-22 03:43:14,397 INFO L226 Difference]: Without dead ends: 326 [2020-12-22 03:43:14,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-22 03:43:14,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-12-22 03:43:14,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 322. [2020-12-22 03:43:14,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-12-22 03:43:14,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 385 transitions. [2020-12-22 03:43:14,401 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 385 transitions. Word has length 254 [2020-12-22 03:43:14,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:14,401 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 385 transitions. [2020-12-22 03:43:14,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-22 03:43:14,402 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 385 transitions. [2020-12-22 03:43:14,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-12-22 03:43:14,402 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:14,403 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:14,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:14,603 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:14,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:14,604 INFO L82 PathProgramCache]: Analyzing trace with hash -802350707, now seen corresponding path program 63 times [2020-12-22 03:43:14,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:14,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441327489] [2020-12-22 03:43:14,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:17,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441327489] [2020-12-22 03:43:17,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112811652] [2020-12-22 03:43:17,579 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 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 [2020-12-22 03:43:17,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2020-12-22 03:43:17,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:17,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-22 03:43:17,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:18,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:18,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:18,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2020-12-22 03:43:18,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048798011] [2020-12-22 03:43:18,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-22 03:43:18,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:18,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-22 03:43:18,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 03:43:18,200 INFO L87 Difference]: Start difference. First operand 322 states and 385 transitions. Second operand 67 states. [2020-12-22 03:43:18,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:18,583 INFO L93 Difference]: Finished difference Result 335 states and 400 transitions. [2020-12-22 03:43:18,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-22 03:43:18,583 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 258 [2020-12-22 03:43:18,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:18,585 INFO L225 Difference]: With dead ends: 335 [2020-12-22 03:43:18,585 INFO L226 Difference]: Without dead ends: 331 [2020-12-22 03:43:18,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 03:43:18,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-12-22 03:43:18,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 327. [2020-12-22 03:43:18,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-12-22 03:43:18,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 391 transitions. [2020-12-22 03:43:18,591 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 391 transitions. Word has length 258 [2020-12-22 03:43:18,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:18,591 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 391 transitions. [2020-12-22 03:43:18,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-22 03:43:18,591 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 391 transitions. [2020-12-22 03:43:18,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-12-22 03:43:18,593 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:18,593 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:18,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:18,808 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:18,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:18,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1004182907, now seen corresponding path program 64 times [2020-12-22 03:43:18,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:18,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819253998] [2020-12-22 03:43:18,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:18,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:21,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:21,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819253998] [2020-12-22 03:43:21,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933283496] [2020-12-22 03:43:21,858 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 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 [2020-12-22 03:43:22,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:43:22,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:22,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-22 03:43:22,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:22,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:22,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2020-12-22 03:43:22,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273940508] [2020-12-22 03:43:22,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-22 03:43:22,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:22,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-22 03:43:22,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 03:43:22,416 INFO L87 Difference]: Start difference. First operand 327 states and 391 transitions. Second operand 68 states. [2020-12-22 03:43:22,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:22,959 INFO L93 Difference]: Finished difference Result 340 states and 406 transitions. [2020-12-22 03:43:22,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-22 03:43:22,960 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 262 [2020-12-22 03:43:22,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:22,961 INFO L225 Difference]: With dead ends: 340 [2020-12-22 03:43:22,961 INFO L226 Difference]: Without dead ends: 336 [2020-12-22 03:43:22,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 03:43:22,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-12-22 03:43:22,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 332. [2020-12-22 03:43:22,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-12-22 03:43:22,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 397 transitions. [2020-12-22 03:43:22,965 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 397 transitions. Word has length 262 [2020-12-22 03:43:22,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:22,966 INFO L481 AbstractCegarLoop]: Abstraction has 332 states and 397 transitions. [2020-12-22 03:43:22,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-22 03:43:22,966 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 397 transitions. [2020-12-22 03:43:22,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-12-22 03:43:22,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:22,967 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:23,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:23,170 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:23,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:23,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1277721193, now seen corresponding path program 65 times [2020-12-22 03:43:23,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:23,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922767527] [2020-12-22 03:43:23,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:26,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:26,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922767527] [2020-12-22 03:43:26,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457214940] [2020-12-22 03:43:26,249 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 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 [2020-12-22 03:43:26,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2020-12-22 03:43:26,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:26,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-22 03:43:26,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:26,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:26,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:26,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2020-12-22 03:43:26,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688725284] [2020-12-22 03:43:26,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-22 03:43:26,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:26,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-22 03:43:26,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-22 03:43:26,850 INFO L87 Difference]: Start difference. First operand 332 states and 397 transitions. Second operand 69 states. [2020-12-22 03:43:27,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:27,316 INFO L93 Difference]: Finished difference Result 345 states and 412 transitions. [2020-12-22 03:43:27,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-22 03:43:27,318 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 266 [2020-12-22 03:43:27,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:27,319 INFO L225 Difference]: With dead ends: 345 [2020-12-22 03:43:27,319 INFO L226 Difference]: Without dead ends: 341 [2020-12-22 03:43:27,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-22 03:43:27,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-12-22 03:43:27,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 337. [2020-12-22 03:43:27,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-12-22 03:43:27,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 403 transitions. [2020-12-22 03:43:27,323 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 403 transitions. Word has length 266 [2020-12-22 03:43:27,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:27,324 INFO L481 AbstractCegarLoop]: Abstraction has 337 states and 403 transitions. [2020-12-22 03:43:27,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-22 03:43:27,324 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 403 transitions. [2020-12-22 03:43:27,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-12-22 03:43:27,325 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:27,325 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:27,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-12-22 03:43:27,526 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:27,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:27,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1757269929, now seen corresponding path program 66 times [2020-12-22 03:43:27,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:27,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235931508] [2020-12-22 03:43:27,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:27,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:30,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:30,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235931508] [2020-12-22 03:43:30,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860666771] [2020-12-22 03:43:30,826 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 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 [2020-12-22 03:43:31,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2020-12-22 03:43:31,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:31,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-22 03:43:31,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:31,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:31,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:31,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2020-12-22 03:43:31,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119548555] [2020-12-22 03:43:31,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-22 03:43:31,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:31,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-22 03:43:31,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 03:43:31,512 INFO L87 Difference]: Start difference. First operand 337 states and 403 transitions. Second operand 70 states. [2020-12-22 03:43:32,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:32,318 INFO L93 Difference]: Finished difference Result 350 states and 418 transitions. [2020-12-22 03:43:32,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-22 03:43:32,319 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 270 [2020-12-22 03:43:32,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:32,321 INFO L225 Difference]: With dead ends: 350 [2020-12-22 03:43:32,321 INFO L226 Difference]: Without dead ends: 346 [2020-12-22 03:43:32,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 03:43:32,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-12-22 03:43:32,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 342. [2020-12-22 03:43:32,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-12-22 03:43:32,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 409 transitions. [2020-12-22 03:43:32,347 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 409 transitions. Word has length 270 [2020-12-22 03:43:32,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:32,348 INFO L481 AbstractCegarLoop]: Abstraction has 342 states and 409 transitions. [2020-12-22 03:43:32,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-22 03:43:32,348 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 409 transitions. [2020-12-22 03:43:32,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2020-12-22 03:43:32,350 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:32,350 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:32,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-22 03:43:32,559 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:32,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:32,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1315750075, now seen corresponding path program 67 times [2020-12-22 03:43:32,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:32,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529835911] [2020-12-22 03:43:32,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:32,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:35,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:35,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529835911] [2020-12-22 03:43:35,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609944729] [2020-12-22 03:43:35,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 03:43:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:36,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-22 03:43:36,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:36,508 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:36,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:36,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2020-12-22 03:43:36,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985284272] [2020-12-22 03:43:36,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-12-22 03:43:36,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:36,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-12-22 03:43:36,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-22 03:43:36,510 INFO L87 Difference]: Start difference. First operand 342 states and 409 transitions. Second operand 71 states. [2020-12-22 03:43:36,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:36,962 INFO L93 Difference]: Finished difference Result 355 states and 424 transitions. [2020-12-22 03:43:36,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-22 03:43:36,963 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 274 [2020-12-22 03:43:36,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:36,965 INFO L225 Difference]: With dead ends: 355 [2020-12-22 03:43:36,965 INFO L226 Difference]: Without dead ends: 351 [2020-12-22 03:43:36,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-22 03:43:36,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-12-22 03:43:36,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 347. [2020-12-22 03:43:36,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2020-12-22 03:43:36,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 415 transitions. [2020-12-22 03:43:36,970 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 415 transitions. Word has length 274 [2020-12-22 03:43:36,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:36,970 INFO L481 AbstractCegarLoop]: Abstraction has 347 states and 415 transitions. [2020-12-22 03:43:36,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-12-22 03:43:36,970 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 415 transitions. [2020-12-22 03:43:36,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-12-22 03:43:36,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:36,973 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:37,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:37,174 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:37,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:37,175 INFO L82 PathProgramCache]: Analyzing trace with hash 231155507, now seen corresponding path program 68 times [2020-12-22 03:43:37,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:37,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476895712] [2020-12-22 03:43:37,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:37,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:40,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:40,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476895712] [2020-12-22 03:43:40,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397213366] [2020-12-22 03:43:40,675 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 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 [2020-12-22 03:43:40,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:43:40,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:40,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-22 03:43:40,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:41,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:41,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:41,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2020-12-22 03:43:41,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015137583] [2020-12-22 03:43:41,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-22 03:43:41,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:41,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-22 03:43:41,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 03:43:41,261 INFO L87 Difference]: Start difference. First operand 347 states and 415 transitions. Second operand 72 states. [2020-12-22 03:43:41,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:41,827 INFO L93 Difference]: Finished difference Result 360 states and 430 transitions. [2020-12-22 03:43:41,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-22 03:43:41,828 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 278 [2020-12-22 03:43:41,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:41,829 INFO L225 Difference]: With dead ends: 360 [2020-12-22 03:43:41,829 INFO L226 Difference]: Without dead ends: 356 [2020-12-22 03:43:41,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 03:43:41,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-12-22 03:43:41,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 352. [2020-12-22 03:43:41,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-12-22 03:43:41,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 421 transitions. [2020-12-22 03:43:41,834 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 421 transitions. Word has length 278 [2020-12-22 03:43:41,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:41,834 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 421 transitions. [2020-12-22 03:43:41,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-22 03:43:41,834 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 421 transitions. [2020-12-22 03:43:41,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2020-12-22 03:43:41,835 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:41,836 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:42,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-12-22 03:43:42,036 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:42,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:42,037 INFO L82 PathProgramCache]: Analyzing trace with hash -590780383, now seen corresponding path program 69 times [2020-12-22 03:43:42,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:42,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564914694] [2020-12-22 03:43:42,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:42,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:45,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:45,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564914694] [2020-12-22 03:43:45,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804393474] [2020-12-22 03:43:45,579 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 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 [2020-12-22 03:43:45,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2020-12-22 03:43:45,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:45,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-22 03:43:45,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:46,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:46,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:46,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2020-12-22 03:43:46,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245541569] [2020-12-22 03:43:46,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-12-22 03:43:46,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:46,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-12-22 03:43:46,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-22 03:43:46,313 INFO L87 Difference]: Start difference. First operand 352 states and 421 transitions. Second operand 73 states. [2020-12-22 03:43:47,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:47,158 INFO L93 Difference]: Finished difference Result 365 states and 436 transitions. [2020-12-22 03:43:47,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-22 03:43:47,159 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 282 [2020-12-22 03:43:47,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:47,160 INFO L225 Difference]: With dead ends: 365 [2020-12-22 03:43:47,160 INFO L226 Difference]: Without dead ends: 361 [2020-12-22 03:43:47,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-22 03:43:47,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-12-22 03:43:47,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 357. [2020-12-22 03:43:47,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-12-22 03:43:47,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 427 transitions. [2020-12-22 03:43:47,165 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 427 transitions. Word has length 282 [2020-12-22 03:43:47,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:47,165 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 427 transitions. [2020-12-22 03:43:47,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-12-22 03:43:47,165 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 427 transitions. [2020-12-22 03:43:47,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-12-22 03:43:47,166 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:47,167 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:47,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-12-22 03:43:47,367 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:47,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:47,368 INFO L82 PathProgramCache]: Analyzing trace with hash -305823217, now seen corresponding path program 70 times [2020-12-22 03:43:47,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:47,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353585694] [2020-12-22 03:43:47,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:51,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:51,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353585694] [2020-12-22 03:43:51,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760211813] [2020-12-22 03:43:51,080 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 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 [2020-12-22 03:43:51,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:43:51,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:51,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-22 03:43:51,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:51,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:51,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:51,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2020-12-22 03:43:51,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19539020] [2020-12-22 03:43:51,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-12-22 03:43:51,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:51,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-12-22 03:43:51,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 03:43:51,681 INFO L87 Difference]: Start difference. First operand 357 states and 427 transitions. Second operand 74 states. [2020-12-22 03:43:52,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:52,275 INFO L93 Difference]: Finished difference Result 370 states and 442 transitions. [2020-12-22 03:43:52,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-12-22 03:43:52,282 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 286 [2020-12-22 03:43:52,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:52,284 INFO L225 Difference]: With dead ends: 370 [2020-12-22 03:43:52,284 INFO L226 Difference]: Without dead ends: 366 [2020-12-22 03:43:52,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 03:43:52,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-12-22 03:43:52,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 362. [2020-12-22 03:43:52,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-12-22 03:43:52,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 433 transitions. [2020-12-22 03:43:52,288 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 433 transitions. Word has length 286 [2020-12-22 03:43:52,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:52,289 INFO L481 AbstractCegarLoop]: Abstraction has 362 states and 433 transitions. [2020-12-22 03:43:52,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-12-22 03:43:52,289 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 433 transitions. [2020-12-22 03:43:52,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-12-22 03:43:52,290 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:52,290 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:52,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2020-12-22 03:43:52,491 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:52,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:52,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1910049539, now seen corresponding path program 71 times [2020-12-22 03:43:52,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:52,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858026665] [2020-12-22 03:43:52,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:52,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:56,318 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:56,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858026665] [2020-12-22 03:43:56,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875260644] [2020-12-22 03:43:56,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 03:43:56,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2020-12-22 03:43:56,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:56,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-22 03:43:56,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:57,029 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:57,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:57,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2020-12-22 03:43:57,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991993919] [2020-12-22 03:43:57,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-22 03:43:57,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:57,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-22 03:43:57,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 03:43:57,033 INFO L87 Difference]: Start difference. First operand 362 states and 433 transitions. Second operand 75 states. [2020-12-22 03:43:57,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:57,782 INFO L93 Difference]: Finished difference Result 375 states and 448 transitions. [2020-12-22 03:43:57,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-22 03:43:57,783 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 290 [2020-12-22 03:43:57,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:57,785 INFO L225 Difference]: With dead ends: 375 [2020-12-22 03:43:57,785 INFO L226 Difference]: Without dead ends: 371 [2020-12-22 03:43:57,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 03:43:57,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-12-22 03:43:57,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 367. [2020-12-22 03:43:57,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-12-22 03:43:57,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 439 transitions. [2020-12-22 03:43:57,796 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 439 transitions. Word has length 290 [2020-12-22 03:43:57,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:57,796 INFO L481 AbstractCegarLoop]: Abstraction has 367 states and 439 transitions. [2020-12-22 03:43:57,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-22 03:43:57,796 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 439 transitions. [2020-12-22 03:43:57,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2020-12-22 03:43:57,798 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:57,798 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:58,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:58,012 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:58,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:58,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1771651307, now seen corresponding path program 72 times [2020-12-22 03:43:58,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:58,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487401097] [2020-12-22 03:43:58,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:01,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:01,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487401097] [2020-12-22 03:44:01,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430656993] [2020-12-22 03:44:01,991 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 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 [2020-12-22 03:44:02,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2020-12-22 03:44:02,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:02,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-22 03:44:02,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:02,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:02,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:02,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2020-12-22 03:44:02,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44964879] [2020-12-22 03:44:02,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-22 03:44:02,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:02,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-22 03:44:02,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-22 03:44:02,739 INFO L87 Difference]: Start difference. First operand 367 states and 439 transitions. Second operand 76 states. [2020-12-22 03:44:03,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:03,378 INFO L93 Difference]: Finished difference Result 380 states and 454 transitions. [2020-12-22 03:44:03,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-22 03:44:03,379 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 294 [2020-12-22 03:44:03,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:03,380 INFO L225 Difference]: With dead ends: 380 [2020-12-22 03:44:03,380 INFO L226 Difference]: Without dead ends: 376 [2020-12-22 03:44:03,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-22 03:44:03,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-12-22 03:44:03,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 372. [2020-12-22 03:44:03,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-12-22 03:44:03,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 445 transitions. [2020-12-22 03:44:03,387 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 445 transitions. Word has length 294 [2020-12-22 03:44:03,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:03,387 INFO L481 AbstractCegarLoop]: Abstraction has 372 states and 445 transitions. [2020-12-22 03:44:03,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-22 03:44:03,387 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 445 transitions. [2020-12-22 03:44:03,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-12-22 03:44:03,389 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:03,389 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:03,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:03,602 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:03,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:03,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1778902489, now seen corresponding path program 73 times [2020-12-22 03:44:03,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:03,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141265144] [2020-12-22 03:44:03,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:07,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141265144] [2020-12-22 03:44:07,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693804205] [2020-12-22 03:44:07,706 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 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 [2020-12-22 03:44:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:07,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-22 03:44:07,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:08,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:08,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:08,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2020-12-22 03:44:08,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675298861] [2020-12-22 03:44:08,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-12-22 03:44:08,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:08,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-12-22 03:44:08,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-22 03:44:08,342 INFO L87 Difference]: Start difference. First operand 372 states and 445 transitions. Second operand 77 states. [2020-12-22 03:44:08,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:08,891 INFO L93 Difference]: Finished difference Result 385 states and 460 transitions. [2020-12-22 03:44:08,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-12-22 03:44:08,892 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 298 [2020-12-22 03:44:08,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:08,894 INFO L225 Difference]: With dead ends: 385 [2020-12-22 03:44:08,894 INFO L226 Difference]: Without dead ends: 381 [2020-12-22 03:44:08,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-22 03:44:08,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-12-22 03:44:08,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 377. [2020-12-22 03:44:08,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 377 states. [2020-12-22 03:44:08,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 451 transitions. [2020-12-22 03:44:08,899 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 451 transitions. Word has length 298 [2020-12-22 03:44:08,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:08,899 INFO L481 AbstractCegarLoop]: Abstraction has 377 states and 451 transitions. [2020-12-22 03:44:08,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-12-22 03:44:08,899 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 451 transitions. [2020-12-22 03:44:08,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-12-22 03:44:08,900 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:08,900 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:09,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:09,101 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:09,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:09,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1751227449, now seen corresponding path program 74 times [2020-12-22 03:44:09,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:09,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028990811] [2020-12-22 03:44:09,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:09,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:13,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:13,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028990811] [2020-12-22 03:44:13,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531780924] [2020-12-22 03:44:13,202 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 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 [2020-12-22 03:44:13,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:44:13,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:13,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-22 03:44:13,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:13,833 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:13,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:13,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2020-12-22 03:44:13,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097970379] [2020-12-22 03:44:13,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-12-22 03:44:13,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:13,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-12-22 03:44:13,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-22 03:44:13,836 INFO L87 Difference]: Start difference. First operand 377 states and 451 transitions. Second operand 78 states. [2020-12-22 03:44:14,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:14,465 INFO L93 Difference]: Finished difference Result 390 states and 466 transitions. [2020-12-22 03:44:14,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-22 03:44:14,466 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 302 [2020-12-22 03:44:14,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:14,468 INFO L225 Difference]: With dead ends: 390 [2020-12-22 03:44:14,468 INFO L226 Difference]: Without dead ends: 386 [2020-12-22 03:44:14,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-22 03:44:14,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-12-22 03:44:14,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 382. [2020-12-22 03:44:14,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2020-12-22 03:44:14,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 457 transitions. [2020-12-22 03:44:14,474 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 457 transitions. Word has length 302 [2020-12-22 03:44:14,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:14,475 INFO L481 AbstractCegarLoop]: Abstraction has 382 states and 457 transitions. [2020-12-22 03:44:14,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-12-22 03:44:14,475 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 457 transitions. [2020-12-22 03:44:14,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-12-22 03:44:14,476 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:14,476 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:14,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-12-22 03:44:14,677 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:14,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:14,678 INFO L82 PathProgramCache]: Analyzing trace with hash -121095499, now seen corresponding path program 75 times [2020-12-22 03:44:14,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:14,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692786799] [2020-12-22 03:44:14,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:14,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:18,996 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:18,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692786799] [2020-12-22 03:44:18,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571358344] [2020-12-22 03:44:18,997 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 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 [2020-12-22 03:44:19,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2020-12-22 03:44:19,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:19,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-22 03:44:19,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:19,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:19,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2020-12-22 03:44:19,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573436568] [2020-12-22 03:44:19,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-12-22 03:44:19,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:19,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-12-22 03:44:19,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-22 03:44:19,737 INFO L87 Difference]: Start difference. First operand 382 states and 457 transitions. Second operand 79 states. [2020-12-22 03:44:20,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:20,446 INFO L93 Difference]: Finished difference Result 395 states and 472 transitions. [2020-12-22 03:44:20,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-22 03:44:20,446 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 306 [2020-12-22 03:44:20,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:20,448 INFO L225 Difference]: With dead ends: 395 [2020-12-22 03:44:20,448 INFO L226 Difference]: Without dead ends: 391 [2020-12-22 03:44:20,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-22 03:44:20,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2020-12-22 03:44:20,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 387. [2020-12-22 03:44:20,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-12-22 03:44:20,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 463 transitions. [2020-12-22 03:44:20,453 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 463 transitions. Word has length 306 [2020-12-22 03:44:20,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:20,453 INFO L481 AbstractCegarLoop]: Abstraction has 387 states and 463 transitions. [2020-12-22 03:44:20,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-12-22 03:44:20,453 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 463 transitions. [2020-12-22 03:44:20,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-12-22 03:44:20,454 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:20,454 INFO L422 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:20,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:20,655 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:20,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:20,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1915808419, now seen corresponding path program 76 times [2020-12-22 03:44:20,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:20,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027934937] [2020-12-22 03:44:20,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:25,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:25,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027934937] [2020-12-22 03:44:25,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135719673] [2020-12-22 03:44:25,121 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 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 [2020-12-22 03:44:25,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:44:25,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:25,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 78 conjunts are in the unsatisfiable core [2020-12-22 03:44:25,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:25,761 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:25,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:25,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2020-12-22 03:44:25,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41669908] [2020-12-22 03:44:25,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-12-22 03:44:25,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:25,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-12-22 03:44:25,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 03:44:25,763 INFO L87 Difference]: Start difference. First operand 387 states and 463 transitions. Second operand 80 states. [2020-12-22 03:44:26,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:26,466 INFO L93 Difference]: Finished difference Result 400 states and 478 transitions. [2020-12-22 03:44:26,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-12-22 03:44:26,467 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 310 [2020-12-22 03:44:26,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:26,469 INFO L225 Difference]: With dead ends: 400 [2020-12-22 03:44:26,470 INFO L226 Difference]: Without dead ends: 396 [2020-12-22 03:44:26,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 03:44:26,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-12-22 03:44:26,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 392. [2020-12-22 03:44:26,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-12-22 03:44:26,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 469 transitions. [2020-12-22 03:44:26,474 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 469 transitions. Word has length 310 [2020-12-22 03:44:26,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:26,475 INFO L481 AbstractCegarLoop]: Abstraction has 392 states and 469 transitions. [2020-12-22 03:44:26,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-12-22 03:44:26,475 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 469 transitions. [2020-12-22 03:44:26,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2020-12-22 03:44:26,476 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:26,476 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:26,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:26,678 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:26,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:26,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1497107567, now seen corresponding path program 77 times [2020-12-22 03:44:26,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:26,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617488976] [2020-12-22 03:44:26,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:26,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:31,271 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:31,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617488976] [2020-12-22 03:44:31,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056591317] [2020-12-22 03:44:31,272 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 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 [2020-12-22 03:44:31,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2020-12-22 03:44:31,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:31,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 892 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-22 03:44:31,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:32,003 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:32,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:32,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2020-12-22 03:44:32,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780360913] [2020-12-22 03:44:32,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-12-22 03:44:32,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:32,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-12-22 03:44:32,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-22 03:44:32,006 INFO L87 Difference]: Start difference. First operand 392 states and 469 transitions. Second operand 81 states. [2020-12-22 03:44:32,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:32,587 INFO L93 Difference]: Finished difference Result 405 states and 484 transitions. [2020-12-22 03:44:32,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-22 03:44:32,588 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 314 [2020-12-22 03:44:32,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:32,589 INFO L225 Difference]: With dead ends: 405 [2020-12-22 03:44:32,589 INFO L226 Difference]: Without dead ends: 401 [2020-12-22 03:44:32,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-22 03:44:32,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2020-12-22 03:44:32,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 397. [2020-12-22 03:44:32,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-12-22 03:44:32,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 475 transitions. [2020-12-22 03:44:32,595 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 475 transitions. Word has length 314 [2020-12-22 03:44:32,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:32,595 INFO L481 AbstractCegarLoop]: Abstraction has 397 states and 475 transitions. [2020-12-22 03:44:32,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-12-22 03:44:32,595 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 475 transitions. [2020-12-22 03:44:32,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-12-22 03:44:32,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:32,597 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:32,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-12-22 03:44:32,798 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:32,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:32,798 INFO L82 PathProgramCache]: Analyzing trace with hash -676539009, now seen corresponding path program 78 times [2020-12-22 03:44:32,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:32,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973734106] [2020-12-22 03:44:32,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:32,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:37,533 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:37,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973734106] [2020-12-22 03:44:37,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812039720] [2020-12-22 03:44:37,533 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 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 [2020-12-22 03:44:37,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2020-12-22 03:44:37,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:37,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-22 03:44:37,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:38,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:38,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:38,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2020-12-22 03:44:38,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415308541] [2020-12-22 03:44:38,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-12-22 03:44:38,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:38,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-12-22 03:44:38,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-22 03:44:38,311 INFO L87 Difference]: Start difference. First operand 397 states and 475 transitions. Second operand 82 states. [2020-12-22 03:44:39,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:39,139 INFO L93 Difference]: Finished difference Result 410 states and 490 transitions. [2020-12-22 03:44:39,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-12-22 03:44:39,140 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 318 [2020-12-22 03:44:39,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:39,142 INFO L225 Difference]: With dead ends: 410 [2020-12-22 03:44:39,142 INFO L226 Difference]: Without dead ends: 406 [2020-12-22 03:44:39,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-22 03:44:39,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-12-22 03:44:39,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 402. [2020-12-22 03:44:39,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-12-22 03:44:39,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 481 transitions. [2020-12-22 03:44:39,147 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 481 transitions. Word has length 318 [2020-12-22 03:44:39,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:39,147 INFO L481 AbstractCegarLoop]: Abstraction has 402 states and 481 transitions. [2020-12-22 03:44:39,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-12-22 03:44:39,147 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 481 transitions. [2020-12-22 03:44:39,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-12-22 03:44:39,148 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:39,149 INFO L422 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:39,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-12-22 03:44:39,349 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:39,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:39,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1000927123, now seen corresponding path program 79 times [2020-12-22 03:44:39,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:39,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451348534] [2020-12-22 03:44:39,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:44,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451348534] [2020-12-22 03:44:44,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954759620] [2020-12-22 03:44:44,227 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 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 [2020-12-22 03:44:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:44,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-22 03:44:44,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:44,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:44,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:44,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 83 [2020-12-22 03:44:44,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096887602] [2020-12-22 03:44:44,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-12-22 03:44:44,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:44,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-12-22 03:44:44,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-12-22 03:44:44,870 INFO L87 Difference]: Start difference. First operand 402 states and 481 transitions. Second operand 83 states. [2020-12-22 03:44:45,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:45,612 INFO L93 Difference]: Finished difference Result 415 states and 496 transitions. [2020-12-22 03:44:45,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-22 03:44:45,613 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 322 [2020-12-22 03:44:45,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:45,615 INFO L225 Difference]: With dead ends: 415 [2020-12-22 03:44:45,615 INFO L226 Difference]: Without dead ends: 411 [2020-12-22 03:44:45,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-12-22 03:44:45,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-12-22 03:44:45,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 407. [2020-12-22 03:44:45,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2020-12-22 03:44:45,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 487 transitions. [2020-12-22 03:44:45,620 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 487 transitions. Word has length 322 [2020-12-22 03:44:45,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:45,620 INFO L481 AbstractCegarLoop]: Abstraction has 407 states and 487 transitions. [2020-12-22 03:44:45,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-12-22 03:44:45,620 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 487 transitions. [2020-12-22 03:44:45,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-12-22 03:44:45,622 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:45,622 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:45,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:45,823 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:45,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:45,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1972493221, now seen corresponding path program 80 times [2020-12-22 03:44:45,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:45,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016842228] [2020-12-22 03:44:45,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:50,825 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:50,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016842228] [2020-12-22 03:44:50,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870833643] [2020-12-22 03:44:50,826 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 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 [2020-12-22 03:44:51,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:44:51,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:51,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-22 03:44:51,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:51,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:51,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2020-12-22 03:44:51,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830666332] [2020-12-22 03:44:51,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-12-22 03:44:51,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:51,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-12-22 03:44:51,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-12-22 03:44:51,491 INFO L87 Difference]: Start difference. First operand 407 states and 487 transitions. Second operand 84 states. [2020-12-22 03:44:52,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:52,124 INFO L93 Difference]: Finished difference Result 420 states and 502 transitions. [2020-12-22 03:44:52,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-12-22 03:44:52,125 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 326 [2020-12-22 03:44:52,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:52,127 INFO L225 Difference]: With dead ends: 420 [2020-12-22 03:44:52,127 INFO L226 Difference]: Without dead ends: 416 [2020-12-22 03:44:52,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-12-22 03:44:52,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-12-22 03:44:52,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 412. [2020-12-22 03:44:52,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-12-22 03:44:52,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 493 transitions. [2020-12-22 03:44:52,132 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 493 transitions. Word has length 326 [2020-12-22 03:44:52,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:52,132 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 493 transitions. [2020-12-22 03:44:52,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-12-22 03:44:52,133 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 493 transitions. [2020-12-22 03:44:52,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-12-22 03:44:52,134 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:52,134 INFO L422 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:52,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:52,335 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:52,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:52,336 INFO L82 PathProgramCache]: Analyzing trace with hash -2049076919, now seen corresponding path program 81 times [2020-12-22 03:44:52,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:52,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972058921] [2020-12-22 03:44:52,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:52,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:57,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972058921] [2020-12-22 03:44:57,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664584990] [2020-12-22 03:44:57,494 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 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 [2020-12-22 03:44:57,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2020-12-22 03:44:57,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:57,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-22 03:44:57,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:58,317 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:58,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:58,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 85 [2020-12-22 03:44:58,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644177907] [2020-12-22 03:44:58,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-12-22 03:44:58,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:58,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-12-22 03:44:58,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-12-22 03:44:58,320 INFO L87 Difference]: Start difference. First operand 412 states and 493 transitions. Second operand 85 states. [2020-12-22 03:44:59,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:59,048 INFO L93 Difference]: Finished difference Result 425 states and 508 transitions. [2020-12-22 03:44:59,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-12-22 03:44:59,049 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 330 [2020-12-22 03:44:59,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:59,051 INFO L225 Difference]: With dead ends: 425 [2020-12-22 03:44:59,051 INFO L226 Difference]: Without dead ends: 421 [2020-12-22 03:44:59,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-12-22 03:44:59,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-12-22 03:44:59,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 417. [2020-12-22 03:44:59,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2020-12-22 03:44:59,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 499 transitions. [2020-12-22 03:44:59,056 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 499 transitions. Word has length 330 [2020-12-22 03:44:59,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:59,056 INFO L481 AbstractCegarLoop]: Abstraction has 417 states and 499 transitions. [2020-12-22 03:44:59,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-12-22 03:44:59,056 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 499 transitions. [2020-12-22 03:44:59,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-12-22 03:44:59,057 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:59,058 INFO L422 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:59,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:59,258 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:59,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:59,259 INFO L82 PathProgramCache]: Analyzing trace with hash 818992951, now seen corresponding path program 82 times [2020-12-22 03:44:59,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:59,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659835798] [2020-12-22 03:44:59,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:59,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:04,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:04,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659835798] [2020-12-22 03:45:04,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441758028] [2020-12-22 03:45:04,602 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 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 [2020-12-22 03:45:04,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:45:04,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:45:04,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 84 conjunts are in the unsatisfiable core [2020-12-22 03:45:04,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:05,281 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:05,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:05,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 86 [2020-12-22 03:45:05,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824459564] [2020-12-22 03:45:05,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-12-22 03:45:05,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:05,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-12-22 03:45:05,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-12-22 03:45:05,283 INFO L87 Difference]: Start difference. First operand 417 states and 499 transitions. Second operand 86 states. [2020-12-22 03:45:06,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:06,324 INFO L93 Difference]: Finished difference Result 430 states and 514 transitions. [2020-12-22 03:45:06,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-12-22 03:45:06,325 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 334 [2020-12-22 03:45:06,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:06,327 INFO L225 Difference]: With dead ends: 430 [2020-12-22 03:45:06,327 INFO L226 Difference]: Without dead ends: 426 [2020-12-22 03:45:06,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-12-22 03:45:06,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-12-22 03:45:06,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 422. [2020-12-22 03:45:06,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2020-12-22 03:45:06,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 505 transitions. [2020-12-22 03:45:06,333 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 505 transitions. Word has length 334 [2020-12-22 03:45:06,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:06,333 INFO L481 AbstractCegarLoop]: Abstraction has 422 states and 505 transitions. [2020-12-22 03:45:06,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-12-22 03:45:06,333 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 505 transitions. [2020-12-22 03:45:06,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-12-22 03:45:06,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:06,335 INFO L422 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:06,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:06,549 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:06,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:06,549 INFO L82 PathProgramCache]: Analyzing trace with hash 62092837, now seen corresponding path program 83 times [2020-12-22 03:45:06,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:06,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414825387] [2020-12-22 03:45:06,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:06,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:11,971 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:11,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414825387] [2020-12-22 03:45:11,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804102301] [2020-12-22 03:45:11,972 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 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 [2020-12-22 03:45:12,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2020-12-22 03:45:12,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:45:12,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 85 conjunts are in the unsatisfiable core [2020-12-22 03:45:12,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:12,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:12,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 87 [2020-12-22 03:45:12,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139985962] [2020-12-22 03:45:12,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-12-22 03:45:12,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:12,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-12-22 03:45:12,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-12-22 03:45:12,733 INFO L87 Difference]: Start difference. First operand 422 states and 505 transitions. Second operand 87 states. [2020-12-22 03:45:13,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:13,494 INFO L93 Difference]: Finished difference Result 435 states and 520 transitions. [2020-12-22 03:45:13,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-12-22 03:45:13,495 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 338 [2020-12-22 03:45:13,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:13,497 INFO L225 Difference]: With dead ends: 435 [2020-12-22 03:45:13,497 INFO L226 Difference]: Without dead ends: 431 [2020-12-22 03:45:13,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-12-22 03:45:13,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2020-12-22 03:45:13,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 427. [2020-12-22 03:45:13,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-12-22 03:45:13,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 511 transitions. [2020-12-22 03:45:13,503 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 511 transitions. Word has length 338 [2020-12-22 03:45:13,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:13,503 INFO L481 AbstractCegarLoop]: Abstraction has 427 states and 511 transitions. [2020-12-22 03:45:13,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-12-22 03:45:13,503 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 511 transitions. [2020-12-22 03:45:13,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-12-22 03:45:13,505 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:13,505 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:13,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:13,706 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:13,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:13,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1429270035, now seen corresponding path program 84 times [2020-12-22 03:45:13,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:13,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647790482] [2020-12-22 03:45:13,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:19,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647790482] [2020-12-22 03:45:19,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637854588] [2020-12-22 03:45:19,175 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 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 [2020-12-22 03:45:19,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2020-12-22 03:45:19,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:45:19,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 86 conjunts are in the unsatisfiable core [2020-12-22 03:45:19,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:20,024 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:20,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:20,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 88 [2020-12-22 03:45:20,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850733404] [2020-12-22 03:45:20,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-12-22 03:45:20,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:20,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-12-22 03:45:20,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 03:45:20,026 INFO L87 Difference]: Start difference. First operand 427 states and 511 transitions. Second operand 88 states. [2020-12-22 03:45:21,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:21,048 INFO L93 Difference]: Finished difference Result 440 states and 526 transitions. [2020-12-22 03:45:21,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-12-22 03:45:21,049 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 342 [2020-12-22 03:45:21,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:21,051 INFO L225 Difference]: With dead ends: 440 [2020-12-22 03:45:21,051 INFO L226 Difference]: Without dead ends: 436 [2020-12-22 03:45:21,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 03:45:21,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-12-22 03:45:21,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 432. [2020-12-22 03:45:21,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 432 states. [2020-12-22 03:45:21,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 517 transitions. [2020-12-22 03:45:21,057 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 517 transitions. Word has length 342 [2020-12-22 03:45:21,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:21,057 INFO L481 AbstractCegarLoop]: Abstraction has 432 states and 517 transitions. [2020-12-22 03:45:21,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-12-22 03:45:21,057 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 517 transitions. [2020-12-22 03:45:21,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-12-22 03:45:21,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:21,059 INFO L422 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:21,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-12-22 03:45:21,260 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:21,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:21,261 INFO L82 PathProgramCache]: Analyzing trace with hash 976535297, now seen corresponding path program 85 times [2020-12-22 03:45:21,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:21,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448037967] [2020-12-22 03:45:21,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat