/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/loop-acceleration/diamond_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:23:22,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:23:22,651 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:23:22,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 04:23:22,842 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:23:22,893 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:23:22,894 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:23:22,899 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:23:22,899 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:23:22,900 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:23:22,900 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:23:22,900 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:23:22,900 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:23:22,901 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:23:22,901 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:23:22,902 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:23:22,902 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:23:22,903 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:23:22,903 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:23:22,903 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:23:22,903 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:23:22,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:23:22,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:23:22,904 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:23:22,904 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:23:22,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:23:22,905 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:23:22,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:23:22,905 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:23:22,905 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:23:22,906 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:23:23,369 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:23:23,414 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:23:23,418 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:23:23,420 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:23:23,421 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:23:23,422 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/diamond_1-1.c [2020-12-22 04:23:23,520 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2dcd2726/900bc21b3f57424891eee95ae076b579/FLAG162354628 [2020-12-22 04:23:24,167 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:23:24,168 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/diamond_1-1.c [2020-12-22 04:23:24,176 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2dcd2726/900bc21b3f57424891eee95ae076b579/FLAG162354628 [2020-12-22 04:23:24,551 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2dcd2726/900bc21b3f57424891eee95ae076b579 [2020-12-22 04:23:24,554 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:23:24,557 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:23:24,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:23:24,563 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:23:24,568 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:23:24,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:23:24" (1/1) ... [2020-12-22 04:23:24,573 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@446788b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:23:24, skipping insertion in model container [2020-12-22 04:23:24,574 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:23:24" (1/1) ... [2020-12-22 04:23:24,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:23:24,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:23:24,834 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/loop-acceleration/diamond_1-1.c[373,386] [2020-12-22 04:23:24,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:23:24,872 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:23:24,888 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/loop-acceleration/diamond_1-1.c[373,386] [2020-12-22 04:23:24,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:23:24,920 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:23:24,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:23:24 WrapperNode [2020-12-22 04:23:24,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:23:24,922 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:23:24,922 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:23:24,922 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:23:24,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:23:24" (1/1) ... [2020-12-22 04:23:24,939 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:23:24" (1/1) ... [2020-12-22 04:23:24,960 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:23:24,961 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:23:24,961 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:23:24,961 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:23:24,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:23:24" (1/1) ... [2020-12-22 04:23:24,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:23:24" (1/1) ... [2020-12-22 04:23:24,974 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:23:24" (1/1) ... [2020-12-22 04:23:24,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:23:24" (1/1) ... [2020-12-22 04:23:24,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:23:24" (1/1) ... [2020-12-22 04:23:24,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:23:24" (1/1) ... [2020-12-22 04:23:24,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:23:24" (1/1) ... [2020-12-22 04:23:24,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:23:24,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:23:24,986 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:23:24,986 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:23:24,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:23:24" (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 04:23:25,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:23:25,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:23:25,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:23:25,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:23:25,319 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:23:25,319 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-22 04:23:25,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:23:25 BoogieIcfgContainer [2020-12-22 04:23:25,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:23:25,323 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:23:25,323 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:23:25,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:23:25,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:23:24" (1/3) ... [2020-12-22 04:23:25,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@132f61cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:23:25, skipping insertion in model container [2020-12-22 04:23:25,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:23:24" (2/3) ... [2020-12-22 04:23:25,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@132f61cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:23:25, skipping insertion in model container [2020-12-22 04:23:25,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:23:25" (3/3) ... [2020-12-22 04:23:25,331 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_1-1.c [2020-12-22 04:23:25,349 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:23:25,353 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:23:25,374 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:23:25,400 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:23:25,400 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:23:25,401 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:23:25,401 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:23:25,401 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:23:25,401 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:23:25,401 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:23:25,401 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:23:25,431 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-22 04:23:25,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:23:25,436 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:25,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:23:25,437 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:25,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:25,443 INFO L82 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2020-12-22 04:23:25,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:25,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851258638] [2020-12-22 04:23:25,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:25,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:25,604 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 04:23:25,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851258638] [2020-12-22 04:23:25,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:23:25,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 04:23:25,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366044482] [2020-12-22 04:23:25,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 04:23:25,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:25,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 04:23:25,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:23:25,633 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2020-12-22 04:23:25,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:25,649 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2020-12-22 04:23:25,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 04:23:25,650 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-22 04:23:25,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:25,658 INFO L225 Difference]: With dead ends: 18 [2020-12-22 04:23:25,659 INFO L226 Difference]: Without dead ends: 8 [2020-12-22 04:23:25,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:23:25,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-22 04:23:25,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-22 04:23:25,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-22 04:23:25,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2020-12-22 04:23:25,699 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2020-12-22 04:23:25,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:25,700 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-12-22 04:23:25,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 04:23:25,700 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2020-12-22 04:23:25,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:23:25,701 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:25,701 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:23:25,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:23:25,702 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:25,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:25,703 INFO L82 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2020-12-22 04:23:25,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:25,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603836474] [2020-12-22 04:23:25,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:25,837 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 04:23:25,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603836474] [2020-12-22 04:23:25,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:23:25,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:23:25,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116214018] [2020-12-22 04:23:25,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:23:25,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:25,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:23:25,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:23:25,842 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 3 states. [2020-12-22 04:23:25,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:25,866 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2020-12-22 04:23:25,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:23:25,867 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-22 04:23:25,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:25,869 INFO L225 Difference]: With dead ends: 14 [2020-12-22 04:23:25,869 INFO L226 Difference]: Without dead ends: 10 [2020-12-22 04:23:25,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 04:23:25,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-22 04:23:25,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2020-12-22 04:23:25,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-22 04:23:25,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-12-22 04:23:25,875 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2020-12-22 04:23:25,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:25,875 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-12-22 04:23:25,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:23:25,876 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2020-12-22 04:23:25,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 04:23:25,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:25,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:25,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:23:25,877 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:25,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:25,878 INFO L82 PathProgramCache]: Analyzing trace with hash 297538966, now seen corresponding path program 1 times [2020-12-22 04:23:25,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:25,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272770982] [2020-12-22 04:23:25,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:26,025 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 04:23:26,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272770982] [2020-12-22 04:23:26,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890600640] [2020-12-22 04:23:26,026 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 04:23:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:26,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:23:26,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:26,173 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 04:23:26,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:26,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 04:23:26,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983106689] [2020-12-22 04:23:26,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:23:26,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:26,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:23:26,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:23:26,177 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2020-12-22 04:23:26,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:26,218 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2020-12-22 04:23:26,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:23:26,218 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 04:23:26,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:26,219 INFO L225 Difference]: With dead ends: 16 [2020-12-22 04:23:26,219 INFO L226 Difference]: Without dead ends: 12 [2020-12-22 04:23:26,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:23:26,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-22 04:23:26,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2020-12-22 04:23:26,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-22 04:23:26,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2020-12-22 04:23:26,224 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2020-12-22 04:23:26,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:26,224 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2020-12-22 04:23:26,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:23:26,225 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2020-12-22 04:23:26,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 04:23:26,225 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:26,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:26,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 04:23:26,442 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:26,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:26,444 INFO L82 PathProgramCache]: Analyzing trace with hash 295691924, now seen corresponding path program 1 times [2020-12-22 04:23:26,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:26,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663312774] [2020-12-22 04:23:26,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:26,555 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 04:23:26,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663312774] [2020-12-22 04:23:26,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309606501] [2020-12-22 04:23:26,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:26,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:23:26,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:26,614 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 04:23:26,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:26,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 04:23:26,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197389959] [2020-12-22 04:23:26,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:23:26,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:26,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:23:26,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:23:26,618 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 5 states. [2020-12-22 04:23:26,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:26,658 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2020-12-22 04:23:26,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:23:26,659 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 04:23:26,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:26,660 INFO L225 Difference]: With dead ends: 18 [2020-12-22 04:23:26,660 INFO L226 Difference]: Without dead ends: 14 [2020-12-22 04:23:26,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:23:26,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-22 04:23:26,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 11. [2020-12-22 04:23:26,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-22 04:23:26,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2020-12-22 04:23:26,665 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2020-12-22 04:23:26,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:26,666 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2020-12-22 04:23:26,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:23:26,666 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2020-12-22 04:23:26,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:23:26,667 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:26,667 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:26,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:26,881 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:26,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:26,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1775672709, now seen corresponding path program 2 times [2020-12-22 04:23:26,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:26,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902047913] [2020-12-22 04:23:26,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:26,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:27,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:27,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902047913] [2020-12-22 04:23:27,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769370396] [2020-12-22 04:23:27,051 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 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 04:23:27,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:23:27,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:27,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:23:27,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:27,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:27,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:27,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 04:23:27,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356287408] [2020-12-22 04:23:27,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:23:27,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:27,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:23:27,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:23:27,164 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 6 states. [2020-12-22 04:23:27,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:27,212 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2020-12-22 04:23:27,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:23:27,213 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 04:23:27,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:27,214 INFO L225 Difference]: With dead ends: 19 [2020-12-22 04:23:27,214 INFO L226 Difference]: Without dead ends: 15 [2020-12-22 04:23:27,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:23:27,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-22 04:23:27,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2020-12-22 04:23:27,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-22 04:23:27,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2020-12-22 04:23:27,220 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 10 [2020-12-22 04:23:27,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:27,221 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2020-12-22 04:23:27,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:23:27,221 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2020-12-22 04:23:27,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:23:27,222 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:27,222 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:27,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:27,438 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:27,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:27,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1777519751, now seen corresponding path program 1 times [2020-12-22 04:23:27,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:27,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9310374] [2020-12-22 04:23:27,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:27,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:27,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:27,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9310374] [2020-12-22 04:23:27,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:23:27,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:23:27,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636847356] [2020-12-22 04:23:27,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:23:27,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:27,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:23:27,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:23:27,476 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 3 states. [2020-12-22 04:23:27,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:27,491 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2020-12-22 04:23:27,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:23:27,492 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-22 04:23:27,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:27,493 INFO L225 Difference]: With dead ends: 26 [2020-12-22 04:23:27,493 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 04:23:27,494 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 04:23:27,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 04:23:27,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2020-12-22 04:23:27,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 04:23:27,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-12-22 04:23:27,500 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 10 [2020-12-22 04:23:27,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:27,500 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-12-22 04:23:27,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:23:27,500 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-12-22 04:23:27,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:23:27,501 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:27,501 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:27,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 04:23:27,502 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:27,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:27,502 INFO L82 PathProgramCache]: Analyzing trace with hash 744287225, now seen corresponding path program 2 times [2020-12-22 04:23:27,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:27,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598256689] [2020-12-22 04:23:27,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:27,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:27,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:27,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598256689] [2020-12-22 04:23:27,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:23:27,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:23:27,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939185026] [2020-12-22 04:23:27,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:23:27,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:27,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:23:27,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:23:27,551 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 3 states. [2020-12-22 04:23:27,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:27,574 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-12-22 04:23:27,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:23:27,574 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-22 04:23:27,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:27,575 INFO L225 Difference]: With dead ends: 26 [2020-12-22 04:23:27,575 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 04:23:27,576 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 04:23:27,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 04:23:27,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2020-12-22 04:23:27,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 04:23:27,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-12-22 04:23:27,582 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2020-12-22 04:23:27,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:27,582 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-12-22 04:23:27,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:23:27,583 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-12-22 04:23:27,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:23:27,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:27,583 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:27,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 04:23:27,584 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:27,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:27,584 INFO L82 PathProgramCache]: Analyzing trace with hash 742440183, now seen corresponding path program 2 times [2020-12-22 04:23:27,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:27,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635100950] [2020-12-22 04:23:27,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:27,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:27,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:27,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635100950] [2020-12-22 04:23:27,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281894936] [2020-12-22 04:23:27,650 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 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 04:23:27,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:23:27,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:27,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:23:27,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:27,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:27,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:27,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 04:23:27,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151060] [2020-12-22 04:23:27,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:23:27,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:27,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:23:27,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:23:27,735 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2020-12-22 04:23:27,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:27,771 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-12-22 04:23:27,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:23:27,772 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 04:23:27,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:27,773 INFO L225 Difference]: With dead ends: 23 [2020-12-22 04:23:27,773 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 04:23:27,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:23:27,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 04:23:27,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-12-22 04:23:27,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 04:23:27,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-12-22 04:23:27,779 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2020-12-22 04:23:27,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:27,779 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-12-22 04:23:27,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:23:27,779 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-12-22 04:23:27,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 04:23:27,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:27,780 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:27,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:27,997 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:27,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:27,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1267267040, now seen corresponding path program 3 times [2020-12-22 04:23:27,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:28,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629910330] [2020-12-22 04:23:28,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:28,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:28,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:28,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629910330] [2020-12-22 04:23:28,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272998118] [2020-12-22 04:23:28,120 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 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 04:23:28,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 04:23:28,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:28,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 04:23:28,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:28,351 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:23:28,404 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:23:28,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:23:28,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:23:28,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2020-12-22 04:23:28,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698641600] [2020-12-22 04:23:28,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:23:28,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:28,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:23:28,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:23:28,433 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 6 states. [2020-12-22 04:23:28,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:28,518 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-12-22 04:23:28,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:23:28,518 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-22 04:23:28,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:28,522 INFO L225 Difference]: With dead ends: 22 [2020-12-22 04:23:28,522 INFO L226 Difference]: Without dead ends: 13 [2020-12-22 04:23:28,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:23:28,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-22 04:23:28,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-22 04:23:28,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-22 04:23:28,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-22 04:23:28,536 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2020-12-22 04:23:28,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:28,537 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-22 04:23:28,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:23:28,537 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-22 04:23:28,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 04:23:28,538 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:28,538 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:28,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:28,753 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:28,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:28,754 INFO L82 PathProgramCache]: Analyzing trace with hash 570787482, now seen corresponding path program 3 times [2020-12-22 04:23:28,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:28,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593439450] [2020-12-22 04:23:28,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:28,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:28,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593439450] [2020-12-22 04:23:28,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060629044] [2020-12-22 04:23:28,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:28,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 04:23:28,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:28,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 04:23:28,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:28,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:28,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:28,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 04:23:28,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177187059] [2020-12-22 04:23:28,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:23:28,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:28,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:23:28,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:23:28,967 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2020-12-22 04:23:29,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:29,030 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-12-22 04:23:29,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:23:29,030 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-22 04:23:29,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:29,031 INFO L225 Difference]: With dead ends: 20 [2020-12-22 04:23:29,031 INFO L226 Difference]: Without dead ends: 16 [2020-12-22 04:23:29,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:23:29,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-22 04:23:29,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-12-22 04:23:29,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 04:23:29,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-22 04:23:29,036 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-12-22 04:23:29,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:29,036 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-22 04:23:29,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:23:29,036 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-22 04:23:29,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:23:29,037 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:29,037 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:29,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:29,251 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:29,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:29,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1178700931, now seen corresponding path program 4 times [2020-12-22 04:23:29,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:29,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955651362] [2020-12-22 04:23:29,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:29,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:29,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955651362] [2020-12-22 04:23:29,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062240478] [2020-12-22 04:23:29,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:29,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:23:29,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:29,430 WARN L261 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 04:23:29,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:29,518 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:23:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:29,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:29,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2020-12-22 04:23:29,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870087566] [2020-12-22 04:23:29,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:23:29,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:29,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:23:29,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:23:29,540 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2020-12-22 04:23:29,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:29,603 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-12-22 04:23:29,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:23:29,604 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-12-22 04:23:29,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:29,604 INFO L225 Difference]: With dead ends: 22 [2020-12-22 04:23:29,604 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 04:23:29,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:23:29,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 04:23:29,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-12-22 04:23:29,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 04:23:29,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-12-22 04:23:29,609 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-12-22 04:23:29,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:29,609 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-12-22 04:23:29,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:23:29,609 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-12-22 04:23:29,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 04:23:29,610 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:29,610 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:29,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:29,824 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:29,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:29,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1190114208, now seen corresponding path program 5 times [2020-12-22 04:23:29,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:29,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110897677] [2020-12-22 04:23:29,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:29,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:29,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110897677] [2020-12-22 04:23:29,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463440289] [2020-12-22 04:23:29,924 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:29,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 04:23:29,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:29,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 04:23:29,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:30,038 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:30,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:30,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 04:23:30,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250798127] [2020-12-22 04:23:30,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:23:30,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:30,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:23:30,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:23:30,041 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2020-12-22 04:23:30,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:30,129 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-12-22 04:23:30,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:23:30,130 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-12-22 04:23:30,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:30,131 INFO L225 Difference]: With dead ends: 24 [2020-12-22 04:23:30,131 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 04:23:30,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:23:30,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 04:23:30,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-22 04:23:30,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 04:23:30,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-12-22 04:23:30,142 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-12-22 04:23:30,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:30,142 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-12-22 04:23:30,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:23:30,143 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-12-22 04:23:30,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 04:23:30,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:30,144 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:30,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 04:23:30,358 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:30,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:30,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1288795907, now seen corresponding path program 6 times [2020-12-22 04:23:30,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:30,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786694855] [2020-12-22 04:23:30,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:30,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:30,469 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:30,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786694855] [2020-12-22 04:23:30,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161977284] [2020-12-22 04:23:30,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:30,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 04:23:30,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:30,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 04:23:30,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:30,618 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:30,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:30,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 04:23:30,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708784320] [2020-12-22 04:23:30,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:23:30,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:30,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:23:30,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:23:30,620 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2020-12-22 04:23:30,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:30,713 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-12-22 04:23:30,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:23:30,714 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-22 04:23:30,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:30,715 INFO L225 Difference]: With dead ends: 26 [2020-12-22 04:23:30,715 INFO L226 Difference]: Without dead ends: 22 [2020-12-22 04:23:30,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:23:30,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-22 04:23:30,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-12-22 04:23:30,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 04:23:30,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-12-22 04:23:30,719 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-12-22 04:23:30,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:30,719 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-12-22 04:23:30,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:23:30,719 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-12-22 04:23:30,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 04:23:30,720 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:30,720 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:30,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:30,927 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:30,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:30,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1632628134, now seen corresponding path program 7 times [2020-12-22 04:23:30,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:30,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714268775] [2020-12-22 04:23:30,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:30,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:31,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714268775] [2020-12-22 04:23:31,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556283968] [2020-12-22 04:23:31,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:23:31,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:31,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 04:23:31,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:31,227 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:31,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:31,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 04:23:31,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643683252] [2020-12-22 04:23:31,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:23:31,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:31,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:23:31,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:23:31,232 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2020-12-22 04:23:31,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:31,348 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-12-22 04:23:31,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:23:31,348 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-12-22 04:23:31,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:31,351 INFO L225 Difference]: With dead ends: 28 [2020-12-22 04:23:31,351 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 04:23:31,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:23:31,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 04:23:31,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-12-22 04:23:31,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 04:23:31,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-12-22 04:23:31,364 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-12-22 04:23:31,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:31,364 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-12-22 04:23:31,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:23:31,365 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-12-22 04:23:31,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:23:31,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:31,366 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:31,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:31,580 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:31,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:31,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1342916489, now seen corresponding path program 8 times [2020-12-22 04:23:31,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:31,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924224933] [2020-12-22 04:23:31,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:31,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:31,721 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:31,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924224933] [2020-12-22 04:23:31,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353160598] [2020-12-22 04:23:31,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:31,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:23:31,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:31,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 04:23:31,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:31,848 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:31,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:31,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 04:23:31,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412915846] [2020-12-22 04:23:31,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:23:31,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:31,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:23:31,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:23:31,866 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2020-12-22 04:23:31,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:31,995 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-12-22 04:23:31,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:23:31,996 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-12-22 04:23:31,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:31,996 INFO L225 Difference]: With dead ends: 30 [2020-12-22 04:23:31,996 INFO L226 Difference]: Without dead ends: 26 [2020-12-22 04:23:31,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:23:31,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-22 04:23:32,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-12-22 04:23:32,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 04:23:32,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-12-22 04:23:32,001 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-12-22 04:23:32,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:32,001 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-12-22 04:23:32,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:23:32,001 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-12-22 04:23:32,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 04:23:32,002 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:32,002 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:32,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 04:23:32,216 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:32,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:32,217 INFO L82 PathProgramCache]: Analyzing trace with hash 2102899884, now seen corresponding path program 9 times [2020-12-22 04:23:32,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:32,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206678198] [2020-12-22 04:23:32,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:32,396 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:32,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206678198] [2020-12-22 04:23:32,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099926445] [2020-12-22 04:23:32,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:32,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 04:23:32,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:32,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 04:23:32,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:32,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:32,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 04:23:32,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992271018] [2020-12-22 04:23:32,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:23:32,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:32,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:23:32,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:23:32,645 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2020-12-22 04:23:32,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:32,810 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-12-22 04:23:32,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:23:32,811 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-12-22 04:23:32,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:32,811 INFO L225 Difference]: With dead ends: 32 [2020-12-22 04:23:32,811 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 04:23:32,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:23:32,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 04:23:32,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-22 04:23:32,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 04:23:32,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-12-22 04:23:32,817 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-12-22 04:23:32,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:32,818 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-12-22 04:23:32,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:23:32,818 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-12-22 04:23:32,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:23:32,818 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:32,819 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:33,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 04:23:33,022 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:33,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:33,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1992465137, now seen corresponding path program 10 times [2020-12-22 04:23:33,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:33,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225827678] [2020-12-22 04:23:33,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:33,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:33,215 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:33,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225827678] [2020-12-22 04:23:33,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404905311] [2020-12-22 04:23:33,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:33,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:23:33,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:33,263 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 04:23:33,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:33,532 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:23:33,560 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:33,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:33,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2020-12-22 04:23:33,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378600904] [2020-12-22 04:23:33,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:23:33,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:33,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:23:33,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:23:33,562 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 24 states. [2020-12-22 04:23:33,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:33,793 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-12-22 04:23:33,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:23:33,794 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 26 [2020-12-22 04:23:33,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:33,795 INFO L225 Difference]: With dead ends: 34 [2020-12-22 04:23:33,795 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 04:23:33,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:23:33,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 04:23:33,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-12-22 04:23:33,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 04:23:33,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-12-22 04:23:33,807 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-12-22 04:23:33,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:33,810 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-12-22 04:23:33,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:23:33,810 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-12-22 04:23:33,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 04:23:33,819 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:33,819 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:34,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:23:34,020 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:34,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:34,021 INFO L82 PathProgramCache]: Analyzing trace with hash 846760114, now seen corresponding path program 11 times [2020-12-22 04:23:34,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:34,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122954725] [2020-12-22 04:23:34,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:34,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:34,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122954725] [2020-12-22 04:23:34,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570416554] [2020-12-22 04:23:34,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:34,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 04:23:34,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:34,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 04:23:34,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:34,927 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:34,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:34,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 04:23:34,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183351327] [2020-12-22 04:23:34,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:23:34,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:34,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:23:34,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:23:34,930 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2020-12-22 04:23:35,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:35,183 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-12-22 04:23:35,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:23:35,185 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-12-22 04:23:35,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:35,186 INFO L225 Difference]: With dead ends: 36 [2020-12-22 04:23:35,186 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 04:23:35,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:23:35,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 04:23:35,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-12-22 04:23:35,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 04:23:35,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-12-22 04:23:35,191 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-12-22 04:23:35,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:35,191 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-12-22 04:23:35,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:23:35,191 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-12-22 04:23:35,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:23:35,192 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:35,192 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:35,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:35,395 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:35,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:35,396 INFO L82 PathProgramCache]: Analyzing trace with hash 2037993365, now seen corresponding path program 12 times [2020-12-22 04:23:35,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:35,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098525791] [2020-12-22 04:23:35,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:35,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:35,619 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:35,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098525791] [2020-12-22 04:23:35,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518018964] [2020-12-22 04:23:35,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:35,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 04:23:35,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:35,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 04:23:35,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:35,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:35,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 04:23:35,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892158484] [2020-12-22 04:23:35,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:23:35,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:35,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:23:35,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:23:35,896 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2020-12-22 04:23:36,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:36,165 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-12-22 04:23:36,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 04:23:36,166 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-12-22 04:23:36,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:36,166 INFO L225 Difference]: With dead ends: 38 [2020-12-22 04:23:36,167 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 04:23:36,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:23:36,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 04:23:36,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-12-22 04:23:36,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 04:23:36,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-12-22 04:23:36,172 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-12-22 04:23:36,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:36,172 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-12-22 04:23:36,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:23:36,172 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-12-22 04:23:36,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 04:23:36,173 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:36,173 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:36,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:36,380 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:36,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:36,381 INFO L82 PathProgramCache]: Analyzing trace with hash 56879544, now seen corresponding path program 13 times [2020-12-22 04:23:36,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:36,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333447136] [2020-12-22 04:23:36,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:36,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:36,663 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:36,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333447136] [2020-12-22 04:23:36,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375785958] [2020-12-22 04:23:36,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:36,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:36,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 04:23:36,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:36,809 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:36,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:36,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 04:23:36,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400616347] [2020-12-22 04:23:36,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:23:36,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:36,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:23:36,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:23:36,811 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2020-12-22 04:23:37,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:37,112 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-12-22 04:23:37,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:23:37,113 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2020-12-22 04:23:37,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:37,114 INFO L225 Difference]: With dead ends: 40 [2020-12-22 04:23:37,114 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 04:23:37,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:23:37,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 04:23:37,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-12-22 04:23:37,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 04:23:37,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-12-22 04:23:37,131 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2020-12-22 04:23:37,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:37,131 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-12-22 04:23:37,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:23:37,132 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-12-22 04:23:37,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 04:23:37,135 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:37,135 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:37,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:37,336 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:37,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:37,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1122990309, now seen corresponding path program 14 times [2020-12-22 04:23:37,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:37,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077659343] [2020-12-22 04:23:37,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:37,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:37,610 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:37,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077659343] [2020-12-22 04:23:37,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780735562] [2020-12-22 04:23:37,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:37,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:23:37,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:37,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 04:23:37,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:37,757 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:37,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:37,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 04:23:37,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545687959] [2020-12-22 04:23:37,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 04:23:37,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:37,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 04:23:37,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:23:37,762 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2020-12-22 04:23:38,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:38,135 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-12-22 04:23:38,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 04:23:38,136 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-12-22 04:23:38,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:38,136 INFO L225 Difference]: With dead ends: 42 [2020-12-22 04:23:38,136 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 04:23:38,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:23:38,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 04:23:38,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-12-22 04:23:38,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 04:23:38,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-12-22 04:23:38,147 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2020-12-22 04:23:38,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:38,149 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-12-22 04:23:38,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 04:23:38,149 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-12-22 04:23:38,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 04:23:38,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:38,152 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:38,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 04:23:38,367 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:38,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:38,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1106552898, now seen corresponding path program 15 times [2020-12-22 04:23:38,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:38,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571314904] [2020-12-22 04:23:38,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:38,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:38,722 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:38,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571314904] [2020-12-22 04:23:38,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318540969] [2020-12-22 04:23:38,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:38,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-22 04:23:38,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:38,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 04:23:38,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:39,018 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:39,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:39,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 04:23:39,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117950800] [2020-12-22 04:23:39,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:23:39,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:39,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:23:39,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:23:39,020 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2020-12-22 04:23:39,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:39,415 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-12-22 04:23:39,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:23:39,417 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2020-12-22 04:23:39,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:39,417 INFO L225 Difference]: With dead ends: 44 [2020-12-22 04:23:39,417 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 04:23:39,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:23:39,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 04:23:39,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-12-22 04:23:39,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 04:23:39,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-12-22 04:23:39,423 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2020-12-22 04:23:39,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:39,423 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-12-22 04:23:39,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:23:39,424 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-12-22 04:23:39,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:23:39,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:39,424 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:39,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 04:23:39,631 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:39,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:39,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1804897185, now seen corresponding path program 16 times [2020-12-22 04:23:39,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:39,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471923198] [2020-12-22 04:23:39,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:39,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:40,020 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:40,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471923198] [2020-12-22 04:23:40,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826977322] [2020-12-22 04:23:40,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:23:40,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:23:40,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:40,062 WARN L261 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 04:23:40,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:40,176 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:23:40,187 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:23:40,221 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:40,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:40,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 21 [2020-12-22 04:23:40,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767912672] [2020-12-22 04:23:40,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:23:40,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:40,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:23:40,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:23:40,224 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 21 states. [2020-12-22 04:23:40,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:40,630 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-12-22 04:23:40,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 04:23:40,631 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 38 [2020-12-22 04:23:40,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:40,631 INFO L225 Difference]: With dead ends: 46 [2020-12-22 04:23:40,631 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 04:23:40,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:23:40,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 04:23:40,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-12-22 04:23:40,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 04:23:40,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-12-22 04:23:40,637 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2020-12-22 04:23:40,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:40,637 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-12-22 04:23:40,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:23:40,637 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-12-22 04:23:40,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 04:23:40,638 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:40,638 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:40,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 04:23:40,842 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:40,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:40,844 INFO L82 PathProgramCache]: Analyzing trace with hash -610250044, now seen corresponding path program 17 times [2020-12-22 04:23:40,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:40,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329907627] [2020-12-22 04:23:40,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:41,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329907627] [2020-12-22 04:23:41,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715880049] [2020-12-22 04:23:41,258 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:43,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-22 04:23:43,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:43,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-22 04:23:43,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:44,015 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:44,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:44,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 04:23:44,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717974925] [2020-12-22 04:23:44,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:23:44,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:44,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:23:44,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:23:44,018 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2020-12-22 04:23:44,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:44,565 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-12-22 04:23:44,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 04:23:44,566 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2020-12-22 04:23:44,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:44,567 INFO L225 Difference]: With dead ends: 48 [2020-12-22 04:23:44,567 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 04:23:44,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 14 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:23:44,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 04:23:44,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-12-22 04:23:44,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 04:23:44,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-12-22 04:23:44,572 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2020-12-22 04:23:44,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:44,572 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-12-22 04:23:44,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:23:44,572 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-12-22 04:23:44,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 04:23:44,573 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:44,573 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:44,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 04:23:44,787 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:44,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:44,788 INFO L82 PathProgramCache]: Analyzing trace with hash 2010570023, now seen corresponding path program 18 times [2020-12-22 04:23:44,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:44,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288627483] [2020-12-22 04:23:44,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:44,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:45,152 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:45,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288627483] [2020-12-22 04:23:45,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779844189] [2020-12-22 04:23:45,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:45,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-22 04:23:45,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:45,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 04:23:45,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:45,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:45,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 04:23:45,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311862243] [2020-12-22 04:23:45,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 04:23:45,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:45,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 04:23:45,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:23:45,561 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2020-12-22 04:23:46,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:46,098 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-12-22 04:23:46,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:23:46,099 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2020-12-22 04:23:46,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:46,100 INFO L225 Difference]: With dead ends: 50 [2020-12-22 04:23:46,100 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 04:23:46,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:23:46,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 04:23:46,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-12-22 04:23:46,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 04:23:46,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-12-22 04:23:46,104 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2020-12-22 04:23:46,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:46,105 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-12-22 04:23:46,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 04:23:46,105 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-12-22 04:23:46,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 04:23:46,105 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:46,106 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:46,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 04:23:46,310 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:46,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:46,310 INFO L82 PathProgramCache]: Analyzing trace with hash -527148342, now seen corresponding path program 19 times [2020-12-22 04:23:46,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:46,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100095219] [2020-12-22 04:23:46,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:46,753 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:46,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100095219] [2020-12-22 04:23:46,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339321128] [2020-12-22 04:23:46,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:46,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:46,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 04:23:46,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:46,920 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:46,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:46,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 04:23:46,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876189386] [2020-12-22 04:23:46,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:23:46,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:46,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:23:46,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:23:46,922 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2020-12-22 04:23:47,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:47,474 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-12-22 04:23:47,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:23:47,474 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2020-12-22 04:23:47,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:47,475 INFO L225 Difference]: With dead ends: 52 [2020-12-22 04:23:47,475 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 04:23:47,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:23:47,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 04:23:47,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-12-22 04:23:47,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 04:23:47,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-12-22 04:23:47,480 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2020-12-22 04:23:47,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:47,480 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-12-22 04:23:47,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:23:47,480 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-12-22 04:23:47,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 04:23:47,481 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:47,481 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:47,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:47,695 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:47,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:47,695 INFO L82 PathProgramCache]: Analyzing trace with hash 266927021, now seen corresponding path program 20 times [2020-12-22 04:23:47,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:47,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721086253] [2020-12-22 04:23:47,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:47,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:48,190 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:48,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721086253] [2020-12-22 04:23:48,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867113822] [2020-12-22 04:23:48,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:48,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:23:48,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:48,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 04:23:48,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:48,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:48,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 04:23:48,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435543275] [2020-12-22 04:23:48,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:23:48,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:48,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:23:48,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:23:48,357 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2020-12-22 04:23:48,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:48,989 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-12-22 04:23:48,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 04:23:48,990 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2020-12-22 04:23:48,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:48,991 INFO L225 Difference]: With dead ends: 54 [2020-12-22 04:23:48,991 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 04:23:48,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:23:48,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 04:23:48,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-12-22 04:23:48,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 04:23:48,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-12-22 04:23:48,996 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2020-12-22 04:23:48,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:48,997 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-12-22 04:23:48,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:23:48,997 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-12-22 04:23:48,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 04:23:48,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:48,998 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:49,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 04:23:49,213 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:49,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:49,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1130827824, now seen corresponding path program 21 times [2020-12-22 04:23:49,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:49,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776631598] [2020-12-22 04:23:49,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:49,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776631598] [2020-12-22 04:23:49,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917747275] [2020-12-22 04:23:49,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:50,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-22 04:23:50,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:50,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 04:23:50,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:50,577 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:50,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:50,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 04:23:50,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386904713] [2020-12-22 04:23:50,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:23:50,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:50,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:23:50,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:23:50,579 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2020-12-22 04:23:51,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:51,265 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-12-22 04:23:51,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:23:51,266 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2020-12-22 04:23:51,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:51,267 INFO L225 Difference]: With dead ends: 56 [2020-12-22 04:23:51,267 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 04:23:51,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:23:51,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 04:23:51,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-12-22 04:23:51,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 04:23:51,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-12-22 04:23:51,273 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2020-12-22 04:23:51,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:51,273 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-12-22 04:23:51,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:23:51,274 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-12-22 04:23:51,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 04:23:51,274 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:51,274 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:51,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:51,479 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:51,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:51,480 INFO L82 PathProgramCache]: Analyzing trace with hash -48470221, now seen corresponding path program 22 times [2020-12-22 04:23:51,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:51,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423171279] [2020-12-22 04:23:51,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:51,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:52,058 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:52,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423171279] [2020-12-22 04:23:52,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148765405] [2020-12-22 04:23:52,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:52,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:23:52,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:52,099 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-22 04:23:52,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:53,307 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:23:53,361 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:53,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:53,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 48 [2020-12-22 04:23:53,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509542237] [2020-12-22 04:23:53,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 04:23:53,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:53,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 04:23:53,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2098, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:23:53,364 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 48 states. [2020-12-22 04:23:54,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:54,321 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-12-22 04:23:54,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 04:23:54,321 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 50 [2020-12-22 04:23:54,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:54,322 INFO L225 Difference]: With dead ends: 58 [2020-12-22 04:23:54,322 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 04:23:54,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=158, Invalid=2098, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:23:54,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 04:23:54,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-12-22 04:23:54,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 04:23:54,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-12-22 04:23:54,328 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2020-12-22 04:23:54,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:54,328 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-12-22 04:23:54,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 04:23:54,329 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-12-22 04:23:54,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 04:23:54,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:54,329 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:54,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 04:23:54,530 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:54,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:54,531 INFO L82 PathProgramCache]: Analyzing trace with hash 715100630, now seen corresponding path program 23 times [2020-12-22 04:23:54,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:54,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385183743] [2020-12-22 04:23:54,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:55,074 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:23:55,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385183743] [2020-12-22 04:23:55,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349617358] [2020-12-22 04:23:55,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:01,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-22 04:24:01,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:01,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-22 04:24:01,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:01,776 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:01,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:01,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-22 04:24:01,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242382395] [2020-12-22 04:24:01,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 04:24:01,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:01,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 04:24:01,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:24:01,779 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2020-12-22 04:24:02,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:02,640 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-12-22 04:24:02,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:24:02,641 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2020-12-22 04:24:02,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:02,642 INFO L225 Difference]: With dead ends: 60 [2020-12-22 04:24:02,642 INFO L226 Difference]: Without dead ends: 56 [2020-12-22 04:24:02,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 24 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:24:02,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-22 04:24:02,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-12-22 04:24:02,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 04:24:02,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-12-22 04:24:02,647 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2020-12-22 04:24:02,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:02,647 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-12-22 04:24:02,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 04:24:02,648 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-12-22 04:24:02,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 04:24:02,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:02,648 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:02,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:02,853 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:02,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:02,854 INFO L82 PathProgramCache]: Analyzing trace with hash 67280825, now seen corresponding path program 24 times [2020-12-22 04:24:02,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:02,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720457262] [2020-12-22 04:24:02,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:03,444 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:03,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720457262] [2020-12-22 04:24:03,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438734145] [2020-12-22 04:24:03,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:24:04,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-22 04:24:04,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:04,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-22 04:24:04,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:04,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:04,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-22 04:24:04,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181766125] [2020-12-22 04:24:04,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 04:24:04,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:04,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 04:24:04,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:24:04,549 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2020-12-22 04:24:05,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:05,549 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-12-22 04:24:05,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 04:24:05,550 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2020-12-22 04:24:05,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:05,554 INFO L225 Difference]: With dead ends: 62 [2020-12-22 04:24:05,554 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 04:24:05,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:24:05,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 04:24:05,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-12-22 04:24:05,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 04:24:05,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-12-22 04:24:05,558 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2020-12-22 04:24:05,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:05,558 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-12-22 04:24:05,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 04:24:05,558 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-12-22 04:24:05,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 04:24:05,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:05,559 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:05,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 04:24:05,762 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:05,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:05,764 INFO L82 PathProgramCache]: Analyzing trace with hash 282706140, now seen corresponding path program 25 times [2020-12-22 04:24:05,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:05,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407821594] [2020-12-22 04:24:05,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:05,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:06,418 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:06,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407821594] [2020-12-22 04:24:06,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055466454] [2020-12-22 04:24:06,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:06,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-22 04:24:06,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:06,597 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:06,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:06,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-22 04:24:06,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718985641] [2020-12-22 04:24:06,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 04:24:06,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:06,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 04:24:06,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:24:06,599 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2020-12-22 04:24:07,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:07,617 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-12-22 04:24:07,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 04:24:07,618 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2020-12-22 04:24:07,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:07,618 INFO L225 Difference]: With dead ends: 64 [2020-12-22 04:24:07,618 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 04:24:07,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:24:07,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 04:24:07,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-12-22 04:24:07,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 04:24:07,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-12-22 04:24:07,623 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2020-12-22 04:24:07,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:07,624 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-12-22 04:24:07,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 04:24:07,624 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-12-22 04:24:07,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 04:24:07,624 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:07,625 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:07,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:07,831 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:07,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:07,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1148003647, now seen corresponding path program 26 times [2020-12-22 04:24:07,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:07,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746913320] [2020-12-22 04:24:07,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:08,582 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:08,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746913320] [2020-12-22 04:24:08,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861769042] [2020-12-22 04:24:08,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:08,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:24:08,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:08,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-22 04:24:08,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:08,780 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:08,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:08,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-22 04:24:08,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422860356] [2020-12-22 04:24:08,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 04:24:08,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:08,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 04:24:08,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:24:08,782 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2020-12-22 04:24:09,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:09,940 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-12-22 04:24:09,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 04:24:09,941 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2020-12-22 04:24:09,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:09,942 INFO L225 Difference]: With dead ends: 66 [2020-12-22 04:24:09,942 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 04:24:09,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:24:09,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 04:24:09,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-12-22 04:24:09,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-22 04:24:09,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-12-22 04:24:09,948 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2020-12-22 04:24:09,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:09,948 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-12-22 04:24:09,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 04:24:09,948 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-12-22 04:24:09,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 04:24:09,949 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:09,949 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:10,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 04:24:10,163 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:10,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:10,163 INFO L82 PathProgramCache]: Analyzing trace with hash -524747550, now seen corresponding path program 27 times [2020-12-22 04:24:10,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:10,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200058554] [2020-12-22 04:24:10,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:10,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:10,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200058554] [2020-12-22 04:24:10,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171018290] [2020-12-22 04:24:10,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:24:13,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-22 04:24:13,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:13,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-22 04:24:13,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:14,029 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:14,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:14,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-22 04:24:14,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850966455] [2020-12-22 04:24:14,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:24:14,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:14,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:24:14,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:24:14,031 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2020-12-22 04:24:15,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:15,273 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-12-22 04:24:15,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 04:24:15,274 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2020-12-22 04:24:15,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:15,275 INFO L225 Difference]: With dead ends: 68 [2020-12-22 04:24:15,275 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 04:24:15,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 49 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:24:15,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 04:24:15,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-12-22 04:24:15,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 04:24:15,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-12-22 04:24:15,279 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2020-12-22 04:24:15,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:15,279 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-12-22 04:24:15,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:24:15,279 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-12-22 04:24:15,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 04:24:15,280 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:15,280 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:15,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:15,484 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:15,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:15,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1720879163, now seen corresponding path program 28 times [2020-12-22 04:24:15,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:15,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095720167] [2020-12-22 04:24:15,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:15,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:16,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095720167] [2020-12-22 04:24:16,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30083547] [2020-12-22 04:24:16,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:16,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:24:16,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:16,325 WARN L261 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-22 04:24:16,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:18,243 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:24:18,323 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:18,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:18,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32] total 60 [2020-12-22 04:24:18,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018712696] [2020-12-22 04:24:18,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-22 04:24:18,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:18,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-22 04:24:18,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=3340, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 04:24:18,325 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 60 states. [2020-12-22 04:24:20,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:20,363 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-12-22 04:24:20,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 04:24:20,365 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 62 [2020-12-22 04:24:20,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:20,366 INFO L225 Difference]: With dead ends: 70 [2020-12-22 04:24:20,366 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 04:24:20,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=200, Invalid=3340, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 04:24:20,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 04:24:20,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-12-22 04:24:20,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-22 04:24:20,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-12-22 04:24:20,372 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2020-12-22 04:24:20,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:20,372 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-12-22 04:24:20,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-22 04:24:20,372 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-12-22 04:24:20,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 04:24:20,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:20,373 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:20,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 04:24:20,574 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:20,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:20,575 INFO L82 PathProgramCache]: Analyzing trace with hash -152123928, now seen corresponding path program 29 times [2020-12-22 04:24:20,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:20,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489361134] [2020-12-22 04:24:20,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:20,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:21,450 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:21,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489361134] [2020-12-22 04:24:21,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076307972] [2020-12-22 04:24:21,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:31,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-22 04:24:31,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:31,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-22 04:24:31,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:32,948 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:32,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:32,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-22 04:24:32,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453119076] [2020-12-22 04:24:32,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 04:24:32,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:32,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 04:24:32,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:24:32,950 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2020-12-22 04:24:34,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:34,393 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-12-22 04:24:34,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 04:24:34,394 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2020-12-22 04:24:34,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:34,395 INFO L225 Difference]: With dead ends: 72 [2020-12-22 04:24:34,395 INFO L226 Difference]: Without dead ends: 68 [2020-12-22 04:24:34,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 37 SyntacticMatches, 28 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:24:34,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-22 04:24:34,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-12-22 04:24:34,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-22 04:24:34,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-12-22 04:24:34,399 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2020-12-22 04:24:34,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:34,400 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-12-22 04:24:34,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 04:24:34,400 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-12-22 04:24:34,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 04:24:34,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:34,400 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:34,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 04:24:34,606 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:34,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:34,606 INFO L82 PathProgramCache]: Analyzing trace with hash -111863989, now seen corresponding path program 30 times [2020-12-22 04:24:34,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:34,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604481421] [2020-12-22 04:24:34,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:35,608 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:35,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604481421] [2020-12-22 04:24:35,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259866781] [2020-12-22 04:24:35,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:37,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-22 04:24:37,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:37,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-22 04:24:37,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:37,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:37,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-22 04:24:37,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661262792] [2020-12-22 04:24:37,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 04:24:37,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:37,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 04:24:37,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:24:37,793 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2020-12-22 04:24:39,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:39,365 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-12-22 04:24:39,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 04:24:39,366 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2020-12-22 04:24:39,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:39,367 INFO L225 Difference]: With dead ends: 74 [2020-12-22 04:24:39,367 INFO L226 Difference]: Without dead ends: 70 [2020-12-22 04:24:39,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 55 SyntacticMatches, 12 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:24:39,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-22 04:24:39,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-12-22 04:24:39,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 04:24:39,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-12-22 04:24:39,372 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2020-12-22 04:24:39,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:39,373 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-12-22 04:24:39,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 04:24:39,373 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-12-22 04:24:39,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 04:24:39,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:39,374 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:39,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 04:24:39,578 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:39,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:39,579 INFO L82 PathProgramCache]: Analyzing trace with hash -76768274, now seen corresponding path program 31 times [2020-12-22 04:24:39,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:39,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616848053] [2020-12-22 04:24:39,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:40,600 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:40,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616848053] [2020-12-22 04:24:40,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939230119] [2020-12-22 04:24:40,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:40,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:40,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-22 04:24:40,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:40,801 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:40,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:40,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-22 04:24:40,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400115219] [2020-12-22 04:24:40,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 04:24:40,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:40,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 04:24:40,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:24:40,803 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2020-12-22 04:24:42,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:42,449 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-12-22 04:24:42,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:24:42,450 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2020-12-22 04:24:42,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:42,451 INFO L225 Difference]: With dead ends: 76 [2020-12-22 04:24:42,451 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 04:24:42,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:24:42,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 04:24:42,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-12-22 04:24:42,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-22 04:24:42,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-12-22 04:24:42,457 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2020-12-22 04:24:42,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:42,457 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-12-22 04:24:42,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 04:24:42,457 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-12-22 04:24:42,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 04:24:42,458 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:42,458 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:42,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 04:24:42,660 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:42,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:42,661 INFO L82 PathProgramCache]: Analyzing trace with hash -709524527, now seen corresponding path program 32 times [2020-12-22 04:24:42,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:42,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637168777] [2020-12-22 04:24:42,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:42,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:43,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:43,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637168777] [2020-12-22 04:24:43,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780879442] [2020-12-22 04:24:43,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:43,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:24:43,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:43,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-22 04:24:43,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:43,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:43,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:43,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-22 04:24:43,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385454085] [2020-12-22 04:24:43,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 04:24:43,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:43,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 04:24:43,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:24:43,951 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2020-12-22 04:24:45,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:45,695 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-12-22 04:24:45,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 04:24:45,695 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2020-12-22 04:24:45,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:45,696 INFO L225 Difference]: With dead ends: 78 [2020-12-22 04:24:45,696 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 04:24:45,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:24:45,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 04:24:45,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-12-22 04:24:45,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 04:24:45,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-12-22 04:24:45,702 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2020-12-22 04:24:45,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:45,702 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-12-22 04:24:45,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 04:24:45,703 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-12-22 04:24:45,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 04:24:45,703 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:45,703 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:45,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 04:24:45,917 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:45,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:45,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1097072372, now seen corresponding path program 33 times [2020-12-22 04:24:45,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:45,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841462300] [2020-12-22 04:24:45,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:45,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:46,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:46,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841462300] [2020-12-22 04:24:46,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799391867] [2020-12-22 04:24:46,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:48,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-12-22 04:24:48,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:48,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-22 04:24:48,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:49,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:49,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:49,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-22 04:24:49,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547825828] [2020-12-22 04:24:49,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 04:24:49,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:49,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 04:24:49,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:24:49,524 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2020-12-22 04:24:51,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:51,415 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-12-22 04:24:51,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 04:24:51,416 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2020-12-22 04:24:51,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:51,417 INFO L225 Difference]: With dead ends: 80 [2020-12-22 04:24:51,417 INFO L226 Difference]: Without dead ends: 76 [2020-12-22 04:24:51,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 59 SyntacticMatches, 14 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:24:51,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-22 04:24:51,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-12-22 04:24:51,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 04:24:51,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-12-22 04:24:51,422 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2020-12-22 04:24:51,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:51,422 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-12-22 04:24:51,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 04:24:51,422 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-12-22 04:24:51,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 04:24:51,423 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:51,423 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:51,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 04:24:51,624 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:51,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:51,625 INFO L82 PathProgramCache]: Analyzing trace with hash 2069904727, now seen corresponding path program 34 times [2020-12-22 04:24:51,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:51,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726064939] [2020-12-22 04:24:51,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:52,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:52,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726064939] [2020-12-22 04:24:52,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564555175] [2020-12-22 04:24:52,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:24:52,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:24:52,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:52,839 WARN L261 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-22 04:24:52,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:53,162 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:24:53,170 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:24:53,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:53,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:53,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38] total 41 [2020-12-22 04:24:53,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642041581] [2020-12-22 04:24:53,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 04:24:53,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:53,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 04:24:53,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1522, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:24:53,239 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 41 states. [2020-12-22 04:24:55,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:55,219 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-12-22 04:24:55,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 04:24:55,220 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 74 [2020-12-22 04:24:55,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:55,221 INFO L225 Difference]: With dead ends: 82 [2020-12-22 04:24:55,221 INFO L226 Difference]: Without dead ends: 78 [2020-12-22 04:24:55,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=118, Invalid=1522, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:24:55,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-22 04:24:55,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-12-22 04:24:55,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-22 04:24:55,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-12-22 04:24:55,227 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2020-12-22 04:24:55,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:55,227 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-12-22 04:24:55,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 04:24:55,227 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-12-22 04:24:55,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 04:24:55,228 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:55,228 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:55,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-22 04:24:55,429 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:55,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:55,430 INFO L82 PathProgramCache]: Analyzing trace with hash 658927354, now seen corresponding path program 35 times [2020-12-22 04:24:55,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:55,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863349393] [2020-12-22 04:24:55,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:55,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:56,706 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 04:24:56,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863349393] [2020-12-22 04:24:56,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94774293] [2020-12-22 04:24:56,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:09,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-22 04:25:09,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:09,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 107 conjunts are in the unsatisfiable core [2020-12-22 04:25:09,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:10,788 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 04:25:10,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:10,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-22 04:25:10,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847927056] [2020-12-22 04:25:10,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 04:25:10,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:10,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 04:25:10,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:25:10,790 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2020-12-22 04:25:12,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:12,965 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2020-12-22 04:25:12,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 04:25:12,966 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2020-12-22 04:25:12,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:12,967 INFO L225 Difference]: With dead ends: 84 [2020-12-22 04:25:12,967 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 04:25:12,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 42 SyntacticMatches, 35 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:25:12,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 04:25:12,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-12-22 04:25:12,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 04:25:12,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2020-12-22 04:25:12,973 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2020-12-22 04:25:12,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:12,973 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2020-12-22 04:25:12,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 04:25:12,973 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2020-12-22 04:25:12,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 04:25:12,974 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:12,974 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:13,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:13,179 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:13,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:13,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1919337437, now seen corresponding path program 36 times [2020-12-22 04:25:13,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:13,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467727660] [2020-12-22 04:25:13,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:14,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:14,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467727660] [2020-12-22 04:25:14,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237327452] [2020-12-22 04:25:14,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:19,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-22 04:25:19,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:19,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-22 04:25:19,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:21,146 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:25:21,152 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:25:21,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:21,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:21,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40] total 59 [2020-12-22 04:25:21,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561053046] [2020-12-22 04:25:21,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-22 04:25:21,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:21,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-22 04:25:21,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3234, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 04:25:21,246 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 59 states. [2020-12-22 04:25:24,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:24,285 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-12-22 04:25:24,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 04:25:24,286 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 78 [2020-12-22 04:25:24,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:24,287 INFO L225 Difference]: With dead ends: 86 [2020-12-22 04:25:24,287 INFO L226 Difference]: Without dead ends: 82 [2020-12-22 04:25:24,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=188, Invalid=3234, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 04:25:24,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-22 04:25:24,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-12-22 04:25:24,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 04:25:24,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2020-12-22 04:25:24,295 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2020-12-22 04:25:24,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:24,295 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2020-12-22 04:25:24,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-22 04:25:24,295 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2020-12-22 04:25:24,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 04:25:24,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:24,296 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:24,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:24,501 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:24,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:24,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1992649728, now seen corresponding path program 37 times [2020-12-22 04:25:24,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:24,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587604202] [2020-12-22 04:25:24,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:24,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:25,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:25,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587604202] [2020-12-22 04:25:25,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048021995] [2020-12-22 04:25:25,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:25,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-22 04:25:25,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:26,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:26,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:26,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-22 04:25:26,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169991142] [2020-12-22 04:25:26,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 04:25:26,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:26,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 04:25:26,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:25:26,121 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2020-12-22 04:25:28,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:28,524 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-12-22 04:25:28,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 04:25:28,525 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2020-12-22 04:25:28,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:28,526 INFO L225 Difference]: With dead ends: 88 [2020-12-22 04:25:28,526 INFO L226 Difference]: Without dead ends: 84 [2020-12-22 04:25:28,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:25:28,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-22 04:25:28,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-12-22 04:25:28,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-22 04:25:28,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-12-22 04:25:28,533 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2020-12-22 04:25:28,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:28,533 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-12-22 04:25:28,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 04:25:28,533 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-12-22 04:25:28,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 04:25:28,534 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:28,534 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:28,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:28,749 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:28,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:28,750 INFO L82 PathProgramCache]: Analyzing trace with hash -568682653, now seen corresponding path program 38 times [2020-12-22 04:25:28,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:28,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902635725] [2020-12-22 04:25:28,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:28,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:30,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902635725] [2020-12-22 04:25:30,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159825584] [2020-12-22 04:25:30,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:30,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:25:30,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:30,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-22 04:25:30,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:30,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:30,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:30,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-22 04:25:30,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050923823] [2020-12-22 04:25:30,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 04:25:30,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:30,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 04:25:30,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:25:30,534 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2020-12-22 04:25:33,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:33,036 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-12-22 04:25:33,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 04:25:33,037 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2020-12-22 04:25:33,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:33,038 INFO L225 Difference]: With dead ends: 90 [2020-12-22 04:25:33,038 INFO L226 Difference]: Without dead ends: 86 [2020-12-22 04:25:33,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:25:33,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-22 04:25:33,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-22 04:25:33,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-22 04:25:33,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2020-12-22 04:25:33,044 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2020-12-22 04:25:33,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:33,044 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2020-12-22 04:25:33,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 04:25:33,044 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2020-12-22 04:25:33,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 04:25:33,045 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:33,045 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:33,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-22 04:25:33,246 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:33,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:33,246 INFO L82 PathProgramCache]: Analyzing trace with hash -992840186, now seen corresponding path program 39 times [2020-12-22 04:25:33,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:33,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392961325] [2020-12-22 04:25:33,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:33,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:34,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392961325] [2020-12-22 04:25:34,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059805829] [2020-12-22 04:25:34,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:36,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2020-12-22 04:25:36,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:36,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 91 conjunts are in the unsatisfiable core [2020-12-22 04:25:36,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:37,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:37,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-22 04:25:37,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014057810] [2020-12-22 04:25:37,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 04:25:37,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:37,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 04:25:37,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:25:37,846 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2020-12-22 04:25:40,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:40,540 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2020-12-22 04:25:40,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 04:25:40,541 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2020-12-22 04:25:40,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:40,542 INFO L225 Difference]: With dead ends: 92 [2020-12-22 04:25:40,542 INFO L226 Difference]: Without dead ends: 88 [2020-12-22 04:25:40,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 74 SyntacticMatches, 11 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:25:40,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-22 04:25:40,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-12-22 04:25:40,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 04:25:40,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-12-22 04:25:40,549 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2020-12-22 04:25:40,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:40,549 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-12-22 04:25:40,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 04:25:40,549 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-12-22 04:25:40,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 04:25:40,550 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:40,550 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:40,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:40,756 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:40,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:40,756 INFO L82 PathProgramCache]: Analyzing trace with hash -586336279, now seen corresponding path program 40 times [2020-12-22 04:25:40,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:40,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431956266] [2020-12-22 04:25:40,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:42,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:42,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431956266] [2020-12-22 04:25:42,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395753292] [2020-12-22 04:25:42,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:25:42,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:25:42,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:42,527 WARN L261 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 89 conjunts are in the unsatisfiable core [2020-12-22 04:25:42,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:43,437 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:25:43,445 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:25:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:43,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:43,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44] total 53 [2020-12-22 04:25:43,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823608185] [2020-12-22 04:25:43,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-22 04:25:43,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:43,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-22 04:25:43,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2596, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 04:25:43,538 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 53 states. [2020-12-22 04:25:47,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:47,135 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2020-12-22 04:25:47,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 04:25:47,136 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 86 [2020-12-22 04:25:47,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:47,137 INFO L225 Difference]: With dead ends: 94 [2020-12-22 04:25:47,137 INFO L226 Difference]: Without dead ends: 90 [2020-12-22 04:25:47,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=160, Invalid=2596, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 04:25:47,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-22 04:25:47,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-12-22 04:25:47,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-22 04:25:47,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2020-12-22 04:25:47,145 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2020-12-22 04:25:47,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:47,145 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2020-12-22 04:25:47,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-22 04:25:47,145 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2020-12-22 04:25:47,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 04:25:47,146 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:47,146 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:47,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:47,361 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:47,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:47,362 INFO L82 PathProgramCache]: Analyzing trace with hash -778105588, now seen corresponding path program 41 times [2020-12-22 04:25:47,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:47,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371626332] [2020-12-22 04:25:47,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:49,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:49,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371626332] [2020-12-22 04:25:49,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512689973] [2020-12-22 04:25:49,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:18,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-22 04:26:18,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:18,822 WARN L261 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 126 conjunts are in the unsatisfiable core [2020-12-22 04:26:18,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:20,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:20,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:20,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-22 04:26:20,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036190849] [2020-12-22 04:26:20,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 04:26:20,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:20,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 04:26:20,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:26:20,823 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2020-12-22 04:26:23,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:23,678 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-12-22 04:26:23,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 04:26:23,679 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2020-12-22 04:26:23,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:23,680 INFO L225 Difference]: With dead ends: 96 [2020-12-22 04:26:23,680 INFO L226 Difference]: Without dead ends: 92 [2020-12-22 04:26:23,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 47 SyntacticMatches, 42 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:26:23,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-22 04:26:23,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-12-22 04:26:23,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-22 04:26:23,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-12-22 04:26:23,685 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2020-12-22 04:26:23,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:23,686 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-12-22 04:26:23,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 04:26:23,686 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-12-22 04:26:23,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 04:26:23,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:23,686 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:23,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-22 04:26:23,887 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:23,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:23,888 INFO L82 PathProgramCache]: Analyzing trace with hash -384817809, now seen corresponding path program 42 times [2020-12-22 04:26:23,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:23,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823031089] [2020-12-22 04:26:23,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:23,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:25,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:25,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823031089] [2020-12-22 04:26:25,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378497925] [2020-12-22 04:26:25,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:26:31,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2020-12-22 04:26:31,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:31,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 106 conjunts are in the unsatisfiable core [2020-12-22 04:26:31,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:34,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:34,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:34,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 67 [2020-12-22 04:26:34,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832225676] [2020-12-22 04:26:34,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-22 04:26:34,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:34,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-22 04:26:34,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=4206, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 04:26:34,861 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 67 states. [2020-12-22 04:26:38,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:38,838 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2020-12-22 04:26:38,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-22 04:26:38,839 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 90 [2020-12-22 04:26:38,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:38,839 INFO L225 Difference]: With dead ends: 98 [2020-12-22 04:26:38,839 INFO L226 Difference]: Without dead ends: 94 [2020-12-22 04:26:38,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 56 SyntacticMatches, 14 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=216, Invalid=4206, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 04:26:38,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-22 04:26:38,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-12-22 04:26:38,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-22 04:26:38,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2020-12-22 04:26:38,846 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2020-12-22 04:26:38,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:38,846 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2020-12-22 04:26:38,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-22 04:26:38,847 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2020-12-22 04:26:38,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 04:26:38,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:38,847 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:39,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-22 04:26:39,050 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:39,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:39,050 INFO L82 PathProgramCache]: Analyzing trace with hash -392384238, now seen corresponding path program 43 times [2020-12-22 04:26:39,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:39,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591149883] [2020-12-22 04:26:39,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:40,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:40,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591149883] [2020-12-22 04:26:40,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129037416] [2020-12-22 04:26:40,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:40,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:41,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 89 conjunts are in the unsatisfiable core [2020-12-22 04:26:41,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:41,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:41,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:41,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-22 04:26:41,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748340512] [2020-12-22 04:26:41,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 04:26:41,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:41,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 04:26:41,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:26:41,224 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2020-12-22 04:26:44,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:44,444 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-12-22 04:26:44,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 04:26:44,445 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2020-12-22 04:26:44,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:44,446 INFO L225 Difference]: With dead ends: 100 [2020-12-22 04:26:44,446 INFO L226 Difference]: Without dead ends: 96 [2020-12-22 04:26:44,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:26:44,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-22 04:26:44,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-12-22 04:26:44,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-22 04:26:44,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2020-12-22 04:26:44,453 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2020-12-22 04:26:44,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:44,453 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2020-12-22 04:26:44,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 04:26:44,453 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2020-12-22 04:26:44,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 04:26:44,454 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:44,454 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:44,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 04:26:44,670 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:44,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:44,670 INFO L82 PathProgramCache]: Analyzing trace with hash 926212085, now seen corresponding path program 44 times [2020-12-22 04:26:44,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:44,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817572521] [2020-12-22 04:26:44,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:44,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:46,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:46,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817572521] [2020-12-22 04:26:46,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696233831] [2020-12-22 04:26:46,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:46,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:26:46,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:46,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 91 conjunts are in the unsatisfiable core [2020-12-22 04:26:46,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:46,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:46,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:46,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-22 04:26:46,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889009596] [2020-12-22 04:26:46,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 04:26:46,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:46,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 04:26:46,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:26:46,989 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2020-12-22 04:26:50,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:50,359 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2020-12-22 04:26:50,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 04:26:50,360 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2020-12-22 04:26:50,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:50,361 INFO L225 Difference]: With dead ends: 102 [2020-12-22 04:26:50,362 INFO L226 Difference]: Without dead ends: 98 [2020-12-22 04:26:50,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:26:50,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-22 04:26:50,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-12-22 04:26:50,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-22 04:26:50,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-12-22 04:26:50,375 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2020-12-22 04:26:50,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:50,376 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-12-22 04:26:50,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 04:26:50,376 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-12-22 04:26:50,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 04:26:50,377 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:50,377 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:50,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:50,589 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:50,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:50,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1081926168, now seen corresponding path program 45 times [2020-12-22 04:26:50,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:50,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971309566] [2020-12-22 04:26:50,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:50,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:52,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:52,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971309566] [2020-12-22 04:26:52,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416238651] [2020-12-22 04:26:52,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:26:56,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2020-12-22 04:26:56,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:56,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 94 conjunts are in the unsatisfiable core [2020-12-22 04:26:56,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:57,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:57,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:57,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-22 04:26:57,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217601331] [2020-12-22 04:26:57,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 04:26:57,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:57,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 04:26:57,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:26:57,267 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2020-12-22 04:27:00,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:00,664 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2020-12-22 04:27:00,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-22 04:27:00,665 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2020-12-22 04:27:00,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:00,666 INFO L225 Difference]: With dead ends: 104 [2020-12-22 04:27:00,666 INFO L226 Difference]: Without dead ends: 100 [2020-12-22 04:27:00,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:27:00,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-22 04:27:00,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-12-22 04:27:00,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-22 04:27:00,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2020-12-22 04:27:00,673 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2020-12-22 04:27:00,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:00,674 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2020-12-22 04:27:00,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 04:27:00,674 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2020-12-22 04:27:00,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 04:27:00,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:00,674 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:00,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:00,879 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:00,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:00,880 INFO L82 PathProgramCache]: Analyzing trace with hash 399304571, now seen corresponding path program 46 times [2020-12-22 04:27:00,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:00,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556870966] [2020-12-22 04:27:00,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:00,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:02,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:02,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556870966] [2020-12-22 04:27:02,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071589565] [2020-12-22 04:27:02,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:27:02,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:27:02,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:02,945 WARN L261 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 101 conjunts are in the unsatisfiable core [2020-12-22 04:27:02,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:08,073 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:27:08,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:08,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:08,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50] total 96 [2020-12-22 04:27:08,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982982482] [2020-12-22 04:27:08,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-12-22 04:27:08,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:08,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-12-22 04:27:08,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=8794, Unknown=0, NotChecked=0, Total=9120 [2020-12-22 04:27:08,223 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 96 states. [2020-12-22 04:27:14,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:14,115 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-12-22 04:27:14,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-22 04:27:14,116 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 98 [2020-12-22 04:27:14,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:14,117 INFO L225 Difference]: With dead ends: 106 [2020-12-22 04:27:14,117 INFO L226 Difference]: Without dead ends: 102 [2020-12-22 04:27:14,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=326, Invalid=8794, Unknown=0, NotChecked=0, Total=9120 [2020-12-22 04:27:14,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-22 04:27:14,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-12-22 04:27:14,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-22 04:27:14,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2020-12-22 04:27:14,124 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2020-12-22 04:27:14,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:14,125 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2020-12-22 04:27:14,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-12-22 04:27:14,125 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2020-12-22 04:27:14,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 04:27:14,125 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:14,126 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:14,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-22 04:27:14,343 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:14,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:14,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1529946142, now seen corresponding path program 47 times [2020-12-22 04:27:14,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:14,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213871538] [2020-12-22 04:27:14,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:16,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213871538] [2020-12-22 04:27:16,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601811244] [2020-12-22 04:27:16,534 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true