/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:14:57,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:14:57,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:14:57,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:14:57,456 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:14:57,457 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:14:57,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:14:57,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:14:57,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:14:57,461 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:14:57,462 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:14:57,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:14:57,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:14:57,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:14:57,467 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:14:57,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:14:57,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:14:57,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:14:57,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:14:57,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:14:57,480 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 [2019-11-06 19:14:57,503 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:14:57,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:14:57,508 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:14:57,508 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:14:57,509 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:14:57,509 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:14:57,509 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:14:57,509 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:14:57,509 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:14:57,512 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:14:57,512 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:14:57,512 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:14:57,512 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:14:57,512 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:14:57,513 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:14:57,513 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:14:57,513 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:14:57,513 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:14:57,513 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:14:57,514 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:14:57,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:14:57,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:14:57,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:14:57,514 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:14:57,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:14:57,515 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:14:57,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:14:57,515 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:14:57,515 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:14:57,800 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:14:57,819 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:14:57,822 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:14:57,824 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:14:57,824 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:14:57,825 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label55.c [2019-11-06 19:14:57,899 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c03560531/1c2baa13a13144149fcecf3a5bdc4aea/FLAGf11f621f0 [2019-11-06 19:14:58,458 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:14:58,459 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label55.c [2019-11-06 19:14:58,472 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c03560531/1c2baa13a13144149fcecf3a5bdc4aea/FLAGf11f621f0 [2019-11-06 19:14:58,725 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c03560531/1c2baa13a13144149fcecf3a5bdc4aea [2019-11-06 19:14:58,736 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:14:58,737 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:14:58,738 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:14:58,739 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:14:58,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:14:58,743 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:14:58" (1/1) ... [2019-11-06 19:14:58,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a4741dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:58, skipping insertion in model container [2019-11-06 19:14:58,746 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:14:58" (1/1) ... [2019-11-06 19:14:58,755 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:14:58,819 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:14:59,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:14:59,403 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:14:59,550 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:14:59,571 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:14:59,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:59 WrapperNode [2019-11-06 19:14:59,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:14:59,573 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:14:59,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:14:59,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:14:59,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:59" (1/1) ... [2019-11-06 19:14:59,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:59" (1/1) ... [2019-11-06 19:14:59,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:59" (1/1) ... [2019-11-06 19:14:59,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:59" (1/1) ... [2019-11-06 19:14:59,658 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:59" (1/1) ... [2019-11-06 19:14:59,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:59" (1/1) ... [2019-11-06 19:14:59,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:59" (1/1) ... [2019-11-06 19:14:59,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:14:59,713 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:14:59,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:14:59,715 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:14:59,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:59" (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 [2019-11-06 19:14:59,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:14:59,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:14:59,793 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:14:59,793 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:14:59,793 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:14:59,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:14:59,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:14:59,795 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:14:59,795 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:14:59,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:14:59,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:15:01,242 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:15:01,242 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:15:01,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:15:01 BoogieIcfgContainer [2019-11-06 19:15:01,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:15:01,245 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:15:01,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:15:01,249 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:15:01,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:14:58" (1/3) ... [2019-11-06 19:15:01,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673952be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:15:01, skipping insertion in model container [2019-11-06 19:15:01,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:59" (2/3) ... [2019-11-06 19:15:01,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673952be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:15:01, skipping insertion in model container [2019-11-06 19:15:01,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:15:01" (3/3) ... [2019-11-06 19:15:01,255 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label55.c [2019-11-06 19:15:01,268 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:15:01,278 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:15:01,290 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:15:01,335 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:15:01,335 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:15:01,335 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:15:01,335 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:15:01,336 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:15:01,336 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:15:01,336 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:15:01,336 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:15:01,368 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-11-06 19:15:01,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-06 19:15:01,381 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:01,383 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:01,386 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:01,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:01,391 INFO L82 PathProgramCache]: Analyzing trace with hash 606791250, now seen corresponding path program 1 times [2019-11-06 19:15:01,398 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:01,398 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571718254] [2019-11-06 19:15:01,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:01,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:01,808 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571718254] [2019-11-06 19:15:01,809 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:15:01,809 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:15:01,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727513393] [2019-11-06 19:15:01,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:15:01,818 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:01,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:15:01,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:15:01,835 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-11-06 19:15:04,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:04,702 INFO L93 Difference]: Finished difference Result 902 states and 1627 transitions. [2019-11-06 19:15:04,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:15:04,705 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2019-11-06 19:15:04,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:04,729 INFO L225 Difference]: With dead ends: 902 [2019-11-06 19:15:04,730 INFO L226 Difference]: Without dead ends: 564 [2019-11-06 19:15:04,740 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:15:04,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-11-06 19:15:04,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2019-11-06 19:15:04,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2019-11-06 19:15:04,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 812 transitions. [2019-11-06 19:15:04,882 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 812 transitions. Word has length 63 [2019-11-06 19:15:04,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:04,883 INFO L462 AbstractCegarLoop]: Abstraction has 560 states and 812 transitions. [2019-11-06 19:15:04,883 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:15:04,883 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 812 transitions. [2019-11-06 19:15:04,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-11-06 19:15:04,904 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:04,905 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:04,905 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:04,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:04,906 INFO L82 PathProgramCache]: Analyzing trace with hash 905975074, now seen corresponding path program 1 times [2019-11-06 19:15:04,906 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:04,906 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689647048] [2019-11-06 19:15:04,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:05,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:05,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:05,311 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689647048] [2019-11-06 19:15:05,312 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741337898] [2019-11-06 19:15:05,312 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 [2019-11-06 19:15:05,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:05,416 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:15:05,430 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:05,557 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:05,558 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:05,558 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:15:05,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831171066] [2019-11-06 19:15:05,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:15:05,561 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:05,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:15:05,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:15:05,562 INFO L87 Difference]: Start difference. First operand 560 states and 812 transitions. Second operand 3 states. [2019-11-06 19:15:06,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:06,439 INFO L93 Difference]: Finished difference Result 1666 states and 2449 transitions. [2019-11-06 19:15:06,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:15:06,439 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 175 [2019-11-06 19:15:06,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:06,448 INFO L225 Difference]: With dead ends: 1666 [2019-11-06 19:15:06,448 INFO L226 Difference]: Without dead ends: 1112 [2019-11-06 19:15:06,450 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:15:06,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2019-11-06 19:15:06,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1112. [2019-11-06 19:15:06,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1112 states. [2019-11-06 19:15:06,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1563 transitions. [2019-11-06 19:15:06,491 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1563 transitions. Word has length 175 [2019-11-06 19:15:06,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:06,492 INFO L462 AbstractCegarLoop]: Abstraction has 1112 states and 1563 transitions. [2019-11-06 19:15:06,492 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:15:06,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1563 transitions. [2019-11-06 19:15:06,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-11-06 19:15:06,496 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:06,496 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:06,705 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:06,706 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:06,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:06,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1147690534, now seen corresponding path program 1 times [2019-11-06 19:15:06,707 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:06,708 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346527991] [2019-11-06 19:15:06,709 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:06,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:06,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:06,970 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346527991] [2019-11-06 19:15:06,970 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281955473] [2019-11-06 19:15:06,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:07,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:07,057 INFO L256 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:15:07,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:07,111 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:07,111 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:07,111 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:15:07,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148285638] [2019-11-06 19:15:07,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:15:07,113 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:07,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:15:07,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:15:07,114 INFO L87 Difference]: Start difference. First operand 1112 states and 1563 transitions. Second operand 3 states. [2019-11-06 19:15:08,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:08,051 INFO L93 Difference]: Finished difference Result 3138 states and 4515 transitions. [2019-11-06 19:15:08,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:15:08,052 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 193 [2019-11-06 19:15:08,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:08,064 INFO L225 Difference]: With dead ends: 3138 [2019-11-06 19:15:08,065 INFO L226 Difference]: Without dead ends: 2032 [2019-11-06 19:15:08,068 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:15:08,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2019-11-06 19:15:08,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 2032. [2019-11-06 19:15:08,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2032 states. [2019-11-06 19:15:08,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 2761 transitions. [2019-11-06 19:15:08,131 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 2761 transitions. Word has length 193 [2019-11-06 19:15:08,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:08,132 INFO L462 AbstractCegarLoop]: Abstraction has 2032 states and 2761 transitions. [2019-11-06 19:15:08,132 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:15:08,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 2761 transitions. [2019-11-06 19:15:08,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-11-06 19:15:08,137 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:08,138 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:08,341 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:08,344 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:08,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:08,345 INFO L82 PathProgramCache]: Analyzing trace with hash -326826355, now seen corresponding path program 1 times [2019-11-06 19:15:08,345 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:08,345 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789275888] [2019-11-06 19:15:08,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:08,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:08,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 185 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:15:08,628 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789275888] [2019-11-06 19:15:08,629 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809911262] [2019-11-06 19:15:08,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:08,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:08,730 INFO L256 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:15:08,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:08,830 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 186 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:08,830 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:15:08,830 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:15:08,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500076269] [2019-11-06 19:15:08,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:15:08,833 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:08,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:15:08,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:15:08,835 INFO L87 Difference]: Start difference. First operand 2032 states and 2761 transitions. Second operand 11 states. [2019-11-06 19:15:15,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:15,817 INFO L93 Difference]: Finished difference Result 7284 states and 12592 transitions. [2019-11-06 19:15:15,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-06 19:15:15,818 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 222 [2019-11-06 19:15:15,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:15,868 INFO L225 Difference]: With dead ends: 7284 [2019-11-06 19:15:15,869 INFO L226 Difference]: Without dead ends: 4270 [2019-11-06 19:15:15,884 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 251 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=395, Invalid=1675, Unknown=0, NotChecked=0, Total=2070 [2019-11-06 19:15:15,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4270 states. [2019-11-06 19:15:16,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4270 to 4022. [2019-11-06 19:15:16,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4022 states. [2019-11-06 19:15:16,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4022 states to 4022 states and 5751 transitions. [2019-11-06 19:15:16,087 INFO L78 Accepts]: Start accepts. Automaton has 4022 states and 5751 transitions. Word has length 222 [2019-11-06 19:15:16,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:16,087 INFO L462 AbstractCegarLoop]: Abstraction has 4022 states and 5751 transitions. [2019-11-06 19:15:16,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:15:16,088 INFO L276 IsEmpty]: Start isEmpty. Operand 4022 states and 5751 transitions. [2019-11-06 19:15:16,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2019-11-06 19:15:16,094 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:16,095 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:16,306 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:16,307 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:16,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:16,308 INFO L82 PathProgramCache]: Analyzing trace with hash 718952513, now seen corresponding path program 1 times [2019-11-06 19:15:16,308 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:16,309 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998768661] [2019-11-06 19:15:16,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:16,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:16,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 116 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 19:15:16,697 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998768661] [2019-11-06 19:15:16,697 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431154216] [2019-11-06 19:15:16,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:16,797 INFO L256 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:15:16,801 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:15:16,932 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:16,932 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2019-11-06 19:15:16,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596877992] [2019-11-06 19:15:16,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:15:16,934 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:16,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:15:16,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-11-06 19:15:16,934 INFO L87 Difference]: Start difference. First operand 4022 states and 5751 transitions. Second operand 3 states. [2019-11-06 19:15:17,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:17,770 INFO L93 Difference]: Finished difference Result 8992 states and 13296 transitions. [2019-11-06 19:15:17,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:15:17,770 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 248 [2019-11-06 19:15:17,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:17,801 INFO L225 Difference]: With dead ends: 8992 [2019-11-06 19:15:17,801 INFO L226 Difference]: Without dead ends: 4976 [2019-11-06 19:15:17,818 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-11-06 19:15:17,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4976 states. [2019-11-06 19:15:17,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4976 to 4976. [2019-11-06 19:15:17,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4976 states. [2019-11-06 19:15:17,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4976 states to 4976 states and 7174 transitions. [2019-11-06 19:15:17,980 INFO L78 Accepts]: Start accepts. Automaton has 4976 states and 7174 transitions. Word has length 248 [2019-11-06 19:15:17,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:17,980 INFO L462 AbstractCegarLoop]: Abstraction has 4976 states and 7174 transitions. [2019-11-06 19:15:17,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:15:17,981 INFO L276 IsEmpty]: Start isEmpty. Operand 4976 states and 7174 transitions. [2019-11-06 19:15:17,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2019-11-06 19:15:17,993 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:17,993 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:18,196 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:18,196 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:18,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:18,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1823817087, now seen corresponding path program 1 times [2019-11-06 19:15:18,197 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:18,197 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847377108] [2019-11-06 19:15:18,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:18,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 116 proven. 2 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2019-11-06 19:15:18,710 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847377108] [2019-11-06 19:15:18,711 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780342869] [2019-11-06 19:15:18,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 19:15:18,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:18,827 INFO L256 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:15:18,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-11-06 19:15:18,895 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:18,895 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-11-06 19:15:18,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410025949] [2019-11-06 19:15:18,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:15:18,896 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:18,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:15:18,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:15:18,897 INFO L87 Difference]: Start difference. First operand 4976 states and 7174 transitions. Second operand 3 states. [2019-11-06 19:15:19,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:19,838 INFO L93 Difference]: Finished difference Result 10628 states and 15311 transitions. [2019-11-06 19:15:19,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:15:19,838 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 280 [2019-11-06 19:15:19,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:19,875 INFO L225 Difference]: With dead ends: 10628 [2019-11-06 19:15:19,875 INFO L226 Difference]: Without dead ends: 5730 [2019-11-06 19:15:19,893 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:15:19,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5730 states. [2019-11-06 19:15:20,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5730 to 5540. [2019-11-06 19:15:20,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5540 states. [2019-11-06 19:15:20,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5540 states to 5540 states and 8221 transitions. [2019-11-06 19:15:20,148 INFO L78 Accepts]: Start accepts. Automaton has 5540 states and 8221 transitions. Word has length 280 [2019-11-06 19:15:20,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:20,149 INFO L462 AbstractCegarLoop]: Abstraction has 5540 states and 8221 transitions. [2019-11-06 19:15:20,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:15:20,149 INFO L276 IsEmpty]: Start isEmpty. Operand 5540 states and 8221 transitions. [2019-11-06 19:15:20,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2019-11-06 19:15:20,162 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:20,163 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:20,366 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:20,367 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:20,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:20,368 INFO L82 PathProgramCache]: Analyzing trace with hash -366566147, now seen corresponding path program 1 times [2019-11-06 19:15:20,368 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:20,368 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122034641] [2019-11-06 19:15:20,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:20,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:21,471 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 163 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:15:21,471 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122034641] [2019-11-06 19:15:21,471 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19311038] [2019-11-06 19:15:21,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 19:15:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:21,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:15:21,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:21,631 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:15:21,756 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-06 19:15:21,756 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:21,756 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2019-11-06 19:15:21,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389071602] [2019-11-06 19:15:21,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:15:21,757 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:21,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:15:21,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:15:21,758 INFO L87 Difference]: Start difference. First operand 5540 states and 8221 transitions. Second operand 5 states. [2019-11-06 19:15:23,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:23,077 INFO L93 Difference]: Finished difference Result 11654 states and 17270 transitions. [2019-11-06 19:15:23,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:15:23,078 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 294 [2019-11-06 19:15:23,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:23,115 INFO L225 Difference]: With dead ends: 11654 [2019-11-06 19:15:23,116 INFO L226 Difference]: Without dead ends: 6120 [2019-11-06 19:15:23,184 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 296 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2019-11-06 19:15:23,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6120 states. [2019-11-06 19:15:23,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6120 to 6116. [2019-11-06 19:15:23,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6116 states. [2019-11-06 19:15:23,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6116 states to 6116 states and 8955 transitions. [2019-11-06 19:15:23,348 INFO L78 Accepts]: Start accepts. Automaton has 6116 states and 8955 transitions. Word has length 294 [2019-11-06 19:15:23,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:23,349 INFO L462 AbstractCegarLoop]: Abstraction has 6116 states and 8955 transitions. [2019-11-06 19:15:23,349 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:15:23,349 INFO L276 IsEmpty]: Start isEmpty. Operand 6116 states and 8955 transitions. [2019-11-06 19:15:23,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2019-11-06 19:15:23,376 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:23,377 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:23,590 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:23,591 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:23,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:23,591 INFO L82 PathProgramCache]: Analyzing trace with hash -176257439, now seen corresponding path program 1 times [2019-11-06 19:15:23,593 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:23,593 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324962727] [2019-11-06 19:15:23,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:23,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:23,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:23,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:23,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:23,883 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 168 proven. 130 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2019-11-06 19:15:23,883 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324962727] [2019-11-06 19:15:23,884 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387677116] [2019-11-06 19:15:23,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:24,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:24,002 INFO L256 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:15:24,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2019-11-06 19:15:24,143 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:24,143 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2019-11-06 19:15:24,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039025958] [2019-11-06 19:15:24,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:15:24,144 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:24,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:15:24,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-06 19:15:24,145 INFO L87 Difference]: Start difference. First operand 6116 states and 8955 transitions. Second operand 5 states. [2019-11-06 19:15:25,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:25,243 INFO L93 Difference]: Finished difference Result 11192 states and 15949 transitions. [2019-11-06 19:15:25,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:15:25,243 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 364 [2019-11-06 19:15:25,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:25,272 INFO L225 Difference]: With dead ends: 11192 [2019-11-06 19:15:25,272 INFO L226 Difference]: Without dead ends: 5448 [2019-11-06 19:15:25,295 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 366 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:15:25,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5448 states. [2019-11-06 19:15:25,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5448 to 5218. [2019-11-06 19:15:25,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5218 states. [2019-11-06 19:15:25,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5218 states to 5218 states and 6538 transitions. [2019-11-06 19:15:25,460 INFO L78 Accepts]: Start accepts. Automaton has 5218 states and 6538 transitions. Word has length 364 [2019-11-06 19:15:25,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:25,461 INFO L462 AbstractCegarLoop]: Abstraction has 5218 states and 6538 transitions. [2019-11-06 19:15:25,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:15:25,463 INFO L276 IsEmpty]: Start isEmpty. Operand 5218 states and 6538 transitions. [2019-11-06 19:15:25,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2019-11-06 19:15:25,482 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:25,483 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:25,689 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:25,690 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:25,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:25,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1917381211, now seen corresponding path program 1 times [2019-11-06 19:15:25,690 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:25,691 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727595161] [2019-11-06 19:15:25,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:25,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:25,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:25,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:26,984 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 178 proven. 263 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 19:15:26,984 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727595161] [2019-11-06 19:15:26,984 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606031293] [2019-11-06 19:15:26,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 19:15:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:27,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 19:15:27,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:27,230 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:15:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 338 proven. 53 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-06 19:15:27,476 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:15:27,477 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-11-06 19:15:27,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727871637] [2019-11-06 19:15:27,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 19:15:27,478 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:27,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 19:15:27,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:15:27,479 INFO L87 Difference]: Start difference. First operand 5218 states and 6538 transitions. Second operand 16 states. [2019-11-06 19:15:30,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:30,997 INFO L93 Difference]: Finished difference Result 10554 states and 13248 transitions. [2019-11-06 19:15:30,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 19:15:30,998 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 378 [2019-11-06 19:15:30,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:31,012 INFO L225 Difference]: With dead ends: 10554 [2019-11-06 19:15:31,012 INFO L226 Difference]: Without dead ends: 5475 [2019-11-06 19:15:31,020 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 19:15:31,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5475 states. [2019-11-06 19:15:31,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5475 to 5406. [2019-11-06 19:15:31,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5406 states. [2019-11-06 19:15:31,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5406 states to 5406 states and 6331 transitions. [2019-11-06 19:15:31,113 INFO L78 Accepts]: Start accepts. Automaton has 5406 states and 6331 transitions. Word has length 378 [2019-11-06 19:15:31,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:31,113 INFO L462 AbstractCegarLoop]: Abstraction has 5406 states and 6331 transitions. [2019-11-06 19:15:31,114 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 19:15:31,114 INFO L276 IsEmpty]: Start isEmpty. Operand 5406 states and 6331 transitions. [2019-11-06 19:15:31,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2019-11-06 19:15:31,130 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:31,130 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:31,335 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:31,335 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:31,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:31,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1222870619, now seen corresponding path program 1 times [2019-11-06 19:15:31,336 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:31,337 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826216635] [2019-11-06 19:15:31,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:31,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:31,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:31,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:31,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:32,648 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 414 proven. 115 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2019-11-06 19:15:32,649 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826216635] [2019-11-06 19:15:32,649 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570714704] [2019-11-06 19:15:32,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 19:15:32,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:32,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:15:32,813 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:32,861 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:15:33,075 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 344 proven. 0 refuted. 0 times theorem prover too weak. 429 trivial. 0 not checked. [2019-11-06 19:15:33,075 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:33,075 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2019-11-06 19:15:33,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142625668] [2019-11-06 19:15:33,076 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:15:33,076 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:33,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:15:33,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:15:33,077 INFO L87 Difference]: Start difference. First operand 5406 states and 6331 transitions. Second operand 5 states.