/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_vector_difference_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:37:11,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:37:11,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:37:11,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 20:37:11,058 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:37:11,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:37:11,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:37:11,061 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:37:11,062 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:37:11,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:37:11,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:37:11,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:37:11,073 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:37:11,074 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:37:11,075 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:37:11,076 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:37:11,081 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:37:11,093 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 20:37:11,107 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:37:11,108 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:37:11,109 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:37:11,109 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:37:11,109 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:37:11,110 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:37:11,110 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:37:11,110 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:37:11,110 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:37:11,110 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:37:11,111 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:37:11,111 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:37:11,111 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:37:11,111 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:37:11,111 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:37:11,112 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:37:11,112 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:37:11,112 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:37:11,112 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:37:11,112 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:37:11,113 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:37:11,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:37:11,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:37:11,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:37:11,113 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:37:11,114 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:37:11,114 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:37:11,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:37:11,114 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:37:11,114 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:37:11,401 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:37:11,423 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:37:11,427 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:37:11,429 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:37:11,429 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:37:11,430 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_vector_difference_ground.i [2019-11-23 20:37:11,504 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9f966a32/f14c9a56e57f4830b942fd77318fe570/FLAG484bd347d [2019-11-23 20:37:11,994 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:37:11,995 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_vector_difference_ground.i [2019-11-23 20:37:12,001 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9f966a32/f14c9a56e57f4830b942fd77318fe570/FLAG484bd347d [2019-11-23 20:37:12,407 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9f966a32/f14c9a56e57f4830b942fd77318fe570 [2019-11-23 20:37:12,416 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:37:12,418 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:37:12,419 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:37:12,419 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:37:12,423 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:37:12,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:37:12" (1/1) ... [2019-11-23 20:37:12,427 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@389fe822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:12, skipping insertion in model container [2019-11-23 20:37:12,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:37:12" (1/1) ... [2019-11-23 20:37:12,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:37:12,449 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:37:12,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:37:12,690 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:37:12,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:37:12,733 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:37:12,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:12 WrapperNode [2019-11-23 20:37:12,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:37:12,734 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:37:12,735 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:37:12,735 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:37:12,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:12" (1/1) ... [2019-11-23 20:37:12,833 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:12" (1/1) ... [2019-11-23 20:37:12,859 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:37:12,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:37:12,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:37:12,860 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:37:12,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:12" (1/1) ... [2019-11-23 20:37:12,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:12" (1/1) ... [2019-11-23 20:37:12,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:12" (1/1) ... [2019-11-23 20:37:12,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:12" (1/1) ... [2019-11-23 20:37:12,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:12" (1/1) ... [2019-11-23 20:37:12,884 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:12" (1/1) ... [2019-11-23 20:37:12,886 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:12" (1/1) ... [2019-11-23 20:37:12,888 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:37:12,889 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:37:12,889 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:37:12,889 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:37:12,892 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:12" (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 [2019-11-23 20:37:12,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:37:12,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:37:12,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:37:12,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:37:12,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:37:12,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:37:13,222 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:37:13,223 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 20:37:13,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:37:13 BoogieIcfgContainer [2019-11-23 20:37:13,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:37:13,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:37:13,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:37:13,240 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:37:13,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:37:12" (1/3) ... [2019-11-23 20:37:13,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47135b5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:37:13, skipping insertion in model container [2019-11-23 20:37:13,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:12" (2/3) ... [2019-11-23 20:37:13,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47135b5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:37:13, skipping insertion in model container [2019-11-23 20:37:13,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:37:13" (3/3) ... [2019-11-23 20:37:13,248 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_vector_difference_ground.i [2019-11-23 20:37:13,268 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:37:13,275 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:37:13,287 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:37:13,308 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:37:13,308 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:37:13,308 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:37:13,308 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:37:13,308 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:37:13,309 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:37:13,309 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:37:13,309 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:37:13,322 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-23 20:37:13,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:37:13,328 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:13,329 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:13,329 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:13,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:13,335 INFO L82 PathProgramCache]: Analyzing trace with hash -2015557098, now seen corresponding path program 1 times [2019-11-23 20:37:13,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:13,344 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596595663] [2019-11-23 20:37:13,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:13,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:13,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:13,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596595663] [2019-11-23 20:37:13,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:37:13,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:37:13,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442027663] [2019-11-23 20:37:13,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:37:13,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:13,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:37:13,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:37:13,517 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-11-23 20:37:13,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:13,595 INFO L93 Difference]: Finished difference Result 33 states and 47 transitions. [2019-11-23 20:37:13,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:37:13,597 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-23 20:37:13,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:13,607 INFO L225 Difference]: With dead ends: 33 [2019-11-23 20:37:13,607 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 20:37:13,611 INFO L630 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 [2019-11-23 20:37:13,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 20:37:13,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-11-23 20:37:13,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 20:37:13,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-23 20:37:13,644 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2019-11-23 20:37:13,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:13,644 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-23 20:37:13,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:37:13,645 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-23 20:37:13,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 20:37:13,645 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:13,646 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:13,646 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:13,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:13,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1338517781, now seen corresponding path program 1 times [2019-11-23 20:37:13,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:13,647 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213102102] [2019-11-23 20:37:13,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:13,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:37:13,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213102102] [2019-11-23 20:37:13,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795259643] [2019-11-23 20:37:13,733 INFO L94 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 [2019-11-23 20:37:13,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:13,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:37:13,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:37:13,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:13,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:37:13,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935227797] [2019-11-23 20:37:13,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:37:13,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:13,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:37:13,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:37:13,832 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2019-11-23 20:37:13,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:13,887 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2019-11-23 20:37:13,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:37:13,888 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-23 20:37:13,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:13,889 INFO L225 Difference]: With dead ends: 29 [2019-11-23 20:37:13,889 INFO L226 Difference]: Without dead ends: 19 [2019-11-23 20:37:13,890 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:37:13,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-23 20:37:13,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-11-23 20:37:13,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 20:37:13,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-11-23 20:37:13,895 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2019-11-23 20:37:13,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:13,896 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-11-23 20:37:13,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:37:13,896 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-11-23 20:37:13,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:37:13,897 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:13,897 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:14,100 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:14,105 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:14,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:14,106 INFO L82 PathProgramCache]: Analyzing trace with hash 231525810, now seen corresponding path program 2 times [2019-11-23 20:37:14,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:14,107 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313790175] [2019-11-23 20:37:14,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:14,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:37:14,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313790175] [2019-11-23 20:37:14,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587237391] [2019-11-23 20:37:14,251 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:14,320 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:37:14,320 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:14,321 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:37:14,323 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:37:14,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:14,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:37:14,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517519158] [2019-11-23 20:37:14,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:37:14,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:14,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:37:14,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:37:14,338 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 6 states. [2019-11-23 20:37:14,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:14,412 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2019-11-23 20:37:14,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:37:14,413 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-23 20:37:14,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:14,414 INFO L225 Difference]: With dead ends: 33 [2019-11-23 20:37:14,414 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 20:37:14,417 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:37:14,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 20:37:14,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-11-23 20:37:14,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 20:37:14,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-11-23 20:37:14,425 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2019-11-23 20:37:14,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:14,425 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-11-23 20:37:14,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:37:14,425 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-11-23 20:37:14,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 20:37:14,429 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:14,429 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:14,633 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:14,634 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:14,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:14,635 INFO L82 PathProgramCache]: Analyzing trace with hash 527921017, now seen corresponding path program 3 times [2019-11-23 20:37:14,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:14,636 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790947370] [2019-11-23 20:37:14,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:14,732 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:37:14,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790947370] [2019-11-23 20:37:14,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875002445] [2019-11-23 20:37:14,733 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:14,787 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:37:14,787 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:14,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:37:14,790 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:14,808 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:37:14,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:14,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:37:14,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190850842] [2019-11-23 20:37:14,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:37:14,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:14,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:37:14,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:37:14,812 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2019-11-23 20:37:14,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:14,907 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2019-11-23 20:37:14,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:37:14,909 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2019-11-23 20:37:14,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:14,910 INFO L225 Difference]: With dead ends: 37 [2019-11-23 20:37:14,910 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 20:37:14,911 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:37:14,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 20:37:14,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-23 20:37:14,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:37:14,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-11-23 20:37:14,916 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2019-11-23 20:37:14,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:14,916 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-11-23 20:37:14,917 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:37:14,917 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-11-23 20:37:14,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:37:14,917 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:14,918 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:15,121 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:15,125 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:15,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:15,126 INFO L82 PathProgramCache]: Analyzing trace with hash -150327986, now seen corresponding path program 4 times [2019-11-23 20:37:15,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:15,127 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991031409] [2019-11-23 20:37:15,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:15,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:15,265 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 20:37:15,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991031409] [2019-11-23 20:37:15,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139241406] [2019-11-23 20:37:15,266 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:15,319 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:37:15,319 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:15,320 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:37:15,324 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:15,339 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 20:37:15,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:15,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:37:15,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132128025] [2019-11-23 20:37:15,340 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:37:15,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:15,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:37:15,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:37:15,342 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 8 states. [2019-11-23 20:37:15,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:15,403 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2019-11-23 20:37:15,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:37:15,405 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2019-11-23 20:37:15,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:15,405 INFO L225 Difference]: With dead ends: 41 [2019-11-23 20:37:15,406 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 20:37:15,406 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:37:15,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 20:37:15,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-23 20:37:15,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:37:15,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-11-23 20:37:15,417 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2019-11-23 20:37:15,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:15,417 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-11-23 20:37:15,417 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:37:15,417 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-11-23 20:37:15,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 20:37:15,420 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:15,420 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:15,628 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:15,628 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:15,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:15,629 INFO L82 PathProgramCache]: Analyzing trace with hash 2061613533, now seen corresponding path program 5 times [2019-11-23 20:37:15,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:15,629 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582618019] [2019-11-23 20:37:15,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:15,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:37:15,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582618019] [2019-11-23 20:37:15,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797128418] [2019-11-23 20:37:15,748 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:16,037 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:37:16,037 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:16,040 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:37:16,041 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:37:16,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:16,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:37:16,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135526856] [2019-11-23 20:37:16,077 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:37:16,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:16,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:37:16,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:37:16,078 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 9 states. [2019-11-23 20:37:16,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:16,155 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2019-11-23 20:37:16,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:37:16,156 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2019-11-23 20:37:16,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:16,157 INFO L225 Difference]: With dead ends: 45 [2019-11-23 20:37:16,157 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 20:37:16,157 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:37:16,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 20:37:16,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-23 20:37:16,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:37:16,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-11-23 20:37:16,163 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 24 [2019-11-23 20:37:16,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:16,163 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-11-23 20:37:16,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:37:16,163 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-11-23 20:37:16,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:37:16,164 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:16,164 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:16,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:16,377 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:16,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:16,377 INFO L82 PathProgramCache]: Analyzing trace with hash -654055190, now seen corresponding path program 6 times [2019-11-23 20:37:16,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:16,378 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390600597] [2019-11-23 20:37:16,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:37:16,506 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390600597] [2019-11-23 20:37:16,506 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857768704] [2019-11-23 20:37:16,507 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:16,674 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:37:16,675 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:16,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:37:16,678 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:16,708 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:37:16,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:16,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:37:16,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255897202] [2019-11-23 20:37:16,709 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:37:16,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:16,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:37:16,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:37:16,710 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 10 states. [2019-11-23 20:37:16,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:16,777 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2019-11-23 20:37:16,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:37:16,781 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2019-11-23 20:37:16,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:16,782 INFO L225 Difference]: With dead ends: 49 [2019-11-23 20:37:16,782 INFO L226 Difference]: Without dead ends: 34 [2019-11-23 20:37:16,783 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:37:16,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-23 20:37:16,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-11-23 20:37:16,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 20:37:16,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-11-23 20:37:16,788 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2019-11-23 20:37:16,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:16,789 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-11-23 20:37:16,789 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:37:16,789 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-11-23 20:37:16,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 20:37:16,790 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:16,790 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:17,001 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:17,002 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:17,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:17,003 INFO L82 PathProgramCache]: Analyzing trace with hash 773343297, now seen corresponding path program 7 times [2019-11-23 20:37:17,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:17,004 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684190456] [2019-11-23 20:37:17,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:17,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:17,162 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:37:17,163 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684190456] [2019-11-23 20:37:17,163 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827747398] [2019-11-23 20:37:17,163 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:17,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:17,234 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:37:17,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:17,251 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:37:17,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:17,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:37:17,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252340059] [2019-11-23 20:37:17,253 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:37:17,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:17,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:37:17,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:37:17,254 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 11 states. [2019-11-23 20:37:17,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:17,344 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2019-11-23 20:37:17,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:37:17,345 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2019-11-23 20:37:17,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:17,346 INFO L225 Difference]: With dead ends: 53 [2019-11-23 20:37:17,346 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 20:37:17,350 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:37:17,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 20:37:17,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-11-23 20:37:17,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:37:17,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-11-23 20:37:17,359 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2019-11-23 20:37:17,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:17,359 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-11-23 20:37:17,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:37:17,361 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-11-23 20:37:17,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:37:17,362 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:17,362 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:17,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:17,563 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:17,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:17,563 INFO L82 PathProgramCache]: Analyzing trace with hash 891863174, now seen corresponding path program 8 times [2019-11-23 20:37:17,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:17,565 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083657871] [2019-11-23 20:37:17,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:17,712 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:37:17,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083657871] [2019-11-23 20:37:17,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644734013] [2019-11-23 20:37:17,712 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:17,765 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:37:17,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:17,770 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:37:17,773 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:17,786 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:37:17,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:17,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:37:17,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544780539] [2019-11-23 20:37:17,787 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:37:17,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:17,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:37:17,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:37:17,788 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 12 states. [2019-11-23 20:37:17,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:17,864 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2019-11-23 20:37:17,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:37:17,864 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2019-11-23 20:37:17,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:17,865 INFO L225 Difference]: With dead ends: 57 [2019-11-23 20:37:17,865 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 20:37:17,866 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:37:17,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 20:37:17,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-11-23 20:37:17,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 20:37:17,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2019-11-23 20:37:17,871 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 33 [2019-11-23 20:37:17,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:17,871 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2019-11-23 20:37:17,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:37:17,872 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2019-11-23 20:37:17,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 20:37:17,873 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:17,873 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:18,076 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:18,076 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:18,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:18,076 INFO L82 PathProgramCache]: Analyzing trace with hash 992762533, now seen corresponding path program 9 times [2019-11-23 20:37:18,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:18,077 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513710610] [2019-11-23 20:37:18,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:18,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-23 20:37:18,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513710610] [2019-11-23 20:37:18,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657520097] [2019-11-23 20:37:18,231 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:18,717 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:37:18,717 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:18,719 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:37:18,721 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:18,744 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 20:37:18,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:18,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:37:18,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413984674] [2019-11-23 20:37:18,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:37:18,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:18,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:37:18,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:37:18,746 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 13 states. [2019-11-23 20:37:18,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:18,865 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2019-11-23 20:37:18,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:37:18,866 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2019-11-23 20:37:18,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:18,867 INFO L225 Difference]: With dead ends: 61 [2019-11-23 20:37:18,867 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 20:37:18,868 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:37:18,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 20:37:18,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-11-23 20:37:18,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:37:18,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2019-11-23 20:37:18,873 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 36 [2019-11-23 20:37:18,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:18,873 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2019-11-23 20:37:18,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:37:18,874 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2019-11-23 20:37:18,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:37:18,875 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:18,875 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:19,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:19,079 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:19,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:19,080 INFO L82 PathProgramCache]: Analyzing trace with hash 887583778, now seen corresponding path program 10 times [2019-11-23 20:37:19,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:19,080 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215075302] [2019-11-23 20:37:19,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-23 20:37:19,243 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215075302] [2019-11-23 20:37:19,244 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121147129] [2019-11-23 20:37:19,244 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:19,310 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:37:19,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:19,312 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:37:19,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-23 20:37:19,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:19,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:37:19,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467198586] [2019-11-23 20:37:19,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:37:19,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:19,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:37:19,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:37:19,356 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 14 states. [2019-11-23 20:37:19,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:19,463 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2019-11-23 20:37:19,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:37:19,464 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2019-11-23 20:37:19,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:19,465 INFO L225 Difference]: With dead ends: 65 [2019-11-23 20:37:19,465 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 20:37:19,465 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:37:19,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 20:37:19,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2019-11-23 20:37:19,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 20:37:19,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2019-11-23 20:37:19,474 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 39 [2019-11-23 20:37:19,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:19,474 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2019-11-23 20:37:19,474 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:37:19,474 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2019-11-23 20:37:19,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-23 20:37:19,475 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:19,475 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:19,675 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:19,676 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:19,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:19,676 INFO L82 PathProgramCache]: Analyzing trace with hash 506409225, now seen corresponding path program 11 times [2019-11-23 20:37:19,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:19,677 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616329606] [2019-11-23 20:37:19,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:19,874 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-23 20:37:19,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616329606] [2019-11-23 20:37:19,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529108296] [2019-11-23 20:37:19,876 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:35,112 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:37:35,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:35,125 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:37:35,128 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:35,142 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 20:37:35,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:35,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:37:35,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365775069] [2019-11-23 20:37:35,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:37:35,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:35,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:37:35,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:37:35,145 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 15 states. [2019-11-23 20:37:35,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:35,225 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2019-11-23 20:37:35,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:37:35,225 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2019-11-23 20:37:35,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:35,226 INFO L225 Difference]: With dead ends: 69 [2019-11-23 20:37:35,226 INFO L226 Difference]: Without dead ends: 49 [2019-11-23 20:37:35,227 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:37:35,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-23 20:37:35,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-11-23 20:37:35,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:37:35,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2019-11-23 20:37:35,232 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 42 [2019-11-23 20:37:35,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:35,232 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2019-11-23 20:37:35,233 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:37:35,233 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2019-11-23 20:37:35,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:37:35,233 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:35,234 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:35,434 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:35,434 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:35,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:35,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1705952190, now seen corresponding path program 12 times [2019-11-23 20:37:35,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:35,436 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8861834] [2019-11-23 20:37:35,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:35,611 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:37:35,611 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8861834] [2019-11-23 20:37:35,611 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76265114] [2019-11-23 20:37:35,611 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:48,582 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:37:48,583 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:48,591 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:37:48,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:48,606 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:37:48,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:48,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 20:37:48,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790511001] [2019-11-23 20:37:48,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:37:48,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:48,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:37:48,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:37:48,609 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 16 states. [2019-11-23 20:37:48,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:48,714 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2019-11-23 20:37:48,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:37:48,715 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2019-11-23 20:37:48,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:48,715 INFO L225 Difference]: With dead ends: 73 [2019-11-23 20:37:48,716 INFO L226 Difference]: Without dead ends: 52 [2019-11-23 20:37:48,716 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:37:48,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-23 20:37:48,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-11-23 20:37:48,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-23 20:37:48,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2019-11-23 20:37:48,721 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 45 [2019-11-23 20:37:48,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:48,722 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2019-11-23 20:37:48,722 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:37:48,722 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2019-11-23 20:37:48,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-23 20:37:48,723 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:48,723 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:48,923 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:48,924 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:48,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:48,925 INFO L82 PathProgramCache]: Analyzing trace with hash 288492397, now seen corresponding path program 13 times [2019-11-23 20:37:48,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:48,926 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689629155] [2019-11-23 20:37:48,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:48,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:49,108 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 20:37:49,109 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689629155] [2019-11-23 20:37:49,109 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415312194] [2019-11-23 20:37:49,109 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:49,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:49,188 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:37:49,198 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:49,237 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 20:37:49,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:49,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:37:49,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257928663] [2019-11-23 20:37:49,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:37:49,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:49,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:37:49,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:37:49,240 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 17 states. [2019-11-23 20:37:49,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:49,342 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2019-11-23 20:37:49,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:37:49,342 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2019-11-23 20:37:49,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:49,343 INFO L225 Difference]: With dead ends: 77 [2019-11-23 20:37:49,343 INFO L226 Difference]: Without dead ends: 55 [2019-11-23 20:37:49,344 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:37:49,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-23 20:37:49,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-11-23 20:37:49,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:37:49,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2019-11-23 20:37:49,353 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 48 [2019-11-23 20:37:49,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:49,354 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2019-11-23 20:37:49,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:37:49,354 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2019-11-23 20:37:49,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:37:49,355 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:49,355 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:49,559 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:49,560 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:49,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:49,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1961717594, now seen corresponding path program 14 times [2019-11-23 20:37:49,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:49,562 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336080572] [2019-11-23 20:37:49,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:49,774 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:37:49,775 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336080572] [2019-11-23 20:37:49,775 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77249166] [2019-11-23 20:37:49,775 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:49,840 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:37:49,840 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:49,842 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:37:49,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:49,880 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-23 20:37:49,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:49,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:37:49,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467301768] [2019-11-23 20:37:49,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:37:49,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:49,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:37:49,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:37:49,883 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 18 states. [2019-11-23 20:37:49,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:49,967 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2019-11-23 20:37:49,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:37:49,967 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2019-11-23 20:37:49,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:49,968 INFO L225 Difference]: With dead ends: 81 [2019-11-23 20:37:49,968 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 20:37:49,969 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:37:49,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 20:37:49,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-11-23 20:37:49,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-23 20:37:49,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2019-11-23 20:37:49,974 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 51 [2019-11-23 20:37:49,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:49,975 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2019-11-23 20:37:49,975 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:37:49,975 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2019-11-23 20:37:49,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-23 20:37:49,976 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:49,976 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:50,181 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:50,182 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:50,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:50,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1346775505, now seen corresponding path program 15 times [2019-11-23 20:37:50,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:50,183 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505454563] [2019-11-23 20:37:50,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:50,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:50,386 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-11-23 20:37:50,386 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505454563] [2019-11-23 20:37:50,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909548124] [2019-11-23 20:37:50,387 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:55,149 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:37:55,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:55,154 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:37:55,156 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:55,257 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 29 proven. 120 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:37:55,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:55,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 21 [2019-11-23 20:37:55,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196831065] [2019-11-23 20:37:55,258 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:37:55,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:55,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:37:55,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:37:55,259 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 21 states. [2019-11-23 20:37:55,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:55,388 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2019-11-23 20:37:55,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:37:55,389 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 54 [2019-11-23 20:37:55,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:55,390 INFO L225 Difference]: With dead ends: 87 [2019-11-23 20:37:55,390 INFO L226 Difference]: Without dead ends: 63 [2019-11-23 20:37:55,391 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:37:55,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-23 20:37:55,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-11-23 20:37:55,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-23 20:37:55,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2019-11-23 20:37:55,400 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 54 [2019-11-23 20:37:55,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:55,401 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2019-11-23 20:37:55,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:37:55,401 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2019-11-23 20:37:55,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-23 20:37:55,403 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:55,403 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:55,609 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:55,610 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:55,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:55,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1568459829, now seen corresponding path program 16 times [2019-11-23 20:37:55,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:55,610 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358473958] [2019-11-23 20:37:55,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:55,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:55,934 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-11-23 20:37:55,934 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358473958] [2019-11-23 20:37:55,934 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939659140] [2019-11-23 20:37:55,935 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:56,044 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:37:56,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:56,046 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:37:56,049 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:56,088 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-11-23 20:37:56,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:56,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 20:37:56,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720923440] [2019-11-23 20:37:56,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:37:56,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:56,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:37:56,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:37:56,099 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 21 states. [2019-11-23 20:37:56,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:56,262 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2019-11-23 20:37:56,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:37:56,263 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 60 [2019-11-23 20:37:56,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:56,264 INFO L225 Difference]: With dead ends: 93 [2019-11-23 20:37:56,264 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:37:56,265 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:37:56,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:37:56,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-23 20:37:56,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:37:56,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2019-11-23 20:37:56,276 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 60 [2019-11-23 20:37:56,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:56,283 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2019-11-23 20:37:56,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:37:56,284 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2019-11-23 20:37:56,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:37:56,287 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:56,287 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:56,494 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:56,495 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:56,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:56,495 INFO L82 PathProgramCache]: Analyzing trace with hash -326378862, now seen corresponding path program 17 times [2019-11-23 20:37:56,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:56,496 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492142209] [2019-11-23 20:37:56,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:56,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:56,813 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:37:56,813 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492142209] [2019-11-23 20:37:56,813 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275889419] [2019-11-23 20:37:56,813 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true