/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/Problem03_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:00:21,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:00:21,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:00:21,906 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:00:21,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:00:21,973 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:00:21,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:00:21,975 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 19:00:22,012 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:00:22,013 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:00:22,014 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:00:22,014 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:00:22,014 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:00:22,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:00:22,017 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:00:22,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:00:22,017 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:00:22,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:00:22,018 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:00:22,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:00:22,018 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:00:22,018 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:00:22,018 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:00:22,019 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:00:22,019 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:00:22,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:00:22,019 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:00:22,019 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:00:22,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:00:22,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:00:22,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:00:22,023 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:00:22,024 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:00:22,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:00:22,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:00:22,024 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:00:22,024 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:00:22,340 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:00:22,364 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:00:22,368 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:00:22,370 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:00:22,370 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:00:22,371 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label13.c [2019-11-06 19:00:22,450 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea2ab27d9/68d5575985404f19866a858be3bed342/FLAG7d0fbe6ea [2019-11-06 19:00:23,158 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:00:23,160 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label13.c [2019-11-06 19:00:23,181 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea2ab27d9/68d5575985404f19866a858be3bed342/FLAG7d0fbe6ea [2019-11-06 19:00:23,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea2ab27d9/68d5575985404f19866a858be3bed342 [2019-11-06 19:00:23,285 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:00:23,287 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:00:23,292 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:00:23,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:00:23,296 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:00:23,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:00:23" (1/1) ... [2019-11-06 19:00:23,300 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ec5c3bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:23, skipping insertion in model container [2019-11-06 19:00:23,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:00:23" (1/1) ... [2019-11-06 19:00:23,308 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:00:23,377 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:00:24,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:00:24,064 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:00:24,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:00:24,623 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:00:24,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:24 WrapperNode [2019-11-06 19:00:24,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:00:24,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:00:24,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:00:24,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:00:24,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:24" (1/1) ... [2019-11-06 19:00:24,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:24" (1/1) ... [2019-11-06 19:00:24,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:24" (1/1) ... [2019-11-06 19:00:24,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:24" (1/1) ... [2019-11-06 19:00:24,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:24" (1/1) ... [2019-11-06 19:00:24,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:24" (1/1) ... [2019-11-06 19:00:24,799 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:24" (1/1) ... [2019-11-06 19:00:24,814 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:00:24,814 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:00:24,815 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:00:24,815 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:00:24,816 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:00:24,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:00:24,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:00:24,880 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:00:24,881 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:00:24,881 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:00:24,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:00:24,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:00:24,881 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:00:24,882 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:00:24,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:00:24,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:00:26,836 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:00:26,837 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:00:26,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:00:26 BoogieIcfgContainer [2019-11-06 19:00:26,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:00:26,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:00:26,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:00:26,843 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:00:26,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:00:23" (1/3) ... [2019-11-06 19:00:26,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e80882 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:00:26, skipping insertion in model container [2019-11-06 19:00:26,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:24" (2/3) ... [2019-11-06 19:00:26,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e80882 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:00:26, skipping insertion in model container [2019-11-06 19:00:26,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:00:26" (3/3) ... [2019-11-06 19:00:26,847 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label13.c [2019-11-06 19:00:26,857 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:00:26,866 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:00:26,878 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:00:26,906 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:00:26,906 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:00:26,906 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:00:26,907 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:00:26,907 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:00:26,907 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:00:26,907 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:00:26,907 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:00:26,933 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-11-06 19:00:26,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-06 19:00:26,949 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:26,950 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:00:26,952 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:00:26,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:00:26,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1944252984, now seen corresponding path program 1 times [2019-11-06 19:00:26,968 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:00:26,968 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212499966] [2019-11-06 19:00:26,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:00:27,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:27,815 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:00:27,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:27,977 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 19:00:27,978 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212499966] [2019-11-06 19:00:27,979 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:00:27,979 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:00:27,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826290211] [2019-11-06 19:00:27,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:00:27,989 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:00:28,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:00:28,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:00:28,005 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-11-06 19:00:28,209 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:00:31,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:00:31,418 INFO L93 Difference]: Finished difference Result 845 states and 1493 transitions. [2019-11-06 19:00:31,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 19:00:31,420 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2019-11-06 19:00:31,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:00:31,441 INFO L225 Difference]: With dead ends: 845 [2019-11-06 19:00:31,441 INFO L226 Difference]: Without dead ends: 470 [2019-11-06 19:00:31,449 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:00:31,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2019-11-06 19:00:31,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 464. [2019-11-06 19:00:31,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2019-11-06 19:00:31,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 743 transitions. [2019-11-06 19:00:31,584 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 743 transitions. Word has length 161 [2019-11-06 19:00:31,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:00:31,587 INFO L462 AbstractCegarLoop]: Abstraction has 464 states and 743 transitions. [2019-11-06 19:00:31,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:00:31,588 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 743 transitions. [2019-11-06 19:00:31,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-11-06 19:00:31,605 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:31,605 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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 19:00:31,605 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:00:31,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:00:31,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1469747701, now seen corresponding path program 1 times [2019-11-06 19:00:31,606 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:00:31,606 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667772562] [2019-11-06 19:00:31,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:00:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:31,863 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:00:31,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:31,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:32,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:00:32,037 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667772562] [2019-11-06 19:00:32,037 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:00:32,038 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:00:32,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153394968] [2019-11-06 19:00:32,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:00:32,040 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:00:32,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:00:32,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:00:32,041 INFO L87 Difference]: Start difference. First operand 464 states and 743 transitions. Second operand 8 states. [2019-11-06 19:00:32,221 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:00:35,379 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-11-06 19:00:36,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:00:36,062 INFO L93 Difference]: Finished difference Result 1407 states and 2333 transitions. [2019-11-06 19:00:36,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:00:36,062 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 170 [2019-11-06 19:00:36,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:00:36,074 INFO L225 Difference]: With dead ends: 1407 [2019-11-06 19:00:36,074 INFO L226 Difference]: Without dead ends: 949 [2019-11-06 19:00:36,077 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:00:36,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2019-11-06 19:00:36,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 905. [2019-11-06 19:00:36,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 905 states. [2019-11-06 19:00:36,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1437 transitions. [2019-11-06 19:00:36,144 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1437 transitions. Word has length 170 [2019-11-06 19:00:36,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:00:36,144 INFO L462 AbstractCegarLoop]: Abstraction has 905 states and 1437 transitions. [2019-11-06 19:00:36,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:00:36,144 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1437 transitions. [2019-11-06 19:00:36,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-06 19:00:36,151 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:36,151 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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 19:00:36,152 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:00:36,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:00:36,153 INFO L82 PathProgramCache]: Analyzing trace with hash 931269084, now seen corresponding path program 1 times [2019-11-06 19:00:36,154 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:00:36,154 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070939558] [2019-11-06 19:00:36,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:00:36,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:36,511 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:00:36,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:36,633 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-06 19:00:36,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:36,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:00:36,733 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070939558] [2019-11-06 19:00:36,733 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760931977] [2019-11-06 19:00:36,734 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 19:00:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:37,095 INFO L256 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:00:37,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:00:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:00:37,261 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:00:37,262 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2019-11-06 19:00:37,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092258761] [2019-11-06 19:00:37,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:00:37,273 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:00:37,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:00:37,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:00:37,273 INFO L87 Difference]: Start difference. First operand 905 states and 1437 transitions. Second operand 5 states. [2019-11-06 19:00:38,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:00:38,840 INFO L93 Difference]: Finished difference Result 2749 states and 4502 transitions. [2019-11-06 19:00:38,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:00:38,840 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 173 [2019-11-06 19:00:38,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:00:38,852 INFO L225 Difference]: With dead ends: 2749 [2019-11-06 19:00:38,852 INFO L226 Difference]: Without dead ends: 1850 [2019-11-06 19:00:38,856 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:00:38,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2019-11-06 19:00:38,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1816. [2019-11-06 19:00:38,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1816 states. [2019-11-06 19:00:38,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2877 transitions. [2019-11-06 19:00:38,939 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2877 transitions. Word has length 173 [2019-11-06 19:00:38,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:00:38,940 INFO L462 AbstractCegarLoop]: Abstraction has 1816 states and 2877 transitions. [2019-11-06 19:00:38,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:00:38,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2877 transitions. [2019-11-06 19:00:38,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-11-06 19:00:38,949 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:38,949 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 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 19:00:39,154 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:00:39,154 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:00:39,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:00:39,155 INFO L82 PathProgramCache]: Analyzing trace with hash -771867422, now seen corresponding path program 1 times [2019-11-06 19:00:39,155 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:00:39,156 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11581062] [2019-11-06 19:00:39,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:00:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:39,412 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:00:39,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:39,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:00:39,572 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11581062] [2019-11-06 19:00:39,572 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227986058] [2019-11-06 19:00:39,572 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 19:00:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:39,828 INFO L256 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:00:39,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:00:40,023 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 19:00:40,024 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:00:40,024 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2019-11-06 19:00:40,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211308989] [2019-11-06 19:00:40,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:00:40,026 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:00:40,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:00:40,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:00:40,027 INFO L87 Difference]: Start difference. First operand 1816 states and 2877 transitions. Second operand 5 states. [2019-11-06 19:00:41,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:00:41,845 INFO L93 Difference]: Finished difference Result 5485 states and 9340 transitions. [2019-11-06 19:00:41,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 19:00:41,852 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 180 [2019-11-06 19:00:41,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:00:41,881 INFO L225 Difference]: With dead ends: 5485 [2019-11-06 19:00:41,881 INFO L226 Difference]: Without dead ends: 3675 [2019-11-06 19:00:41,888 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:00:41,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2019-11-06 19:00:42,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 3599. [2019-11-06 19:00:42,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3599 states. [2019-11-06 19:00:42,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3599 states to 3599 states and 5610 transitions. [2019-11-06 19:00:42,056 INFO L78 Accepts]: Start accepts. Automaton has 3599 states and 5610 transitions. Word has length 180 [2019-11-06 19:00:42,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:00:42,056 INFO L462 AbstractCegarLoop]: Abstraction has 3599 states and 5610 transitions. [2019-11-06 19:00:42,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:00:42,056 INFO L276 IsEmpty]: Start isEmpty. Operand 3599 states and 5610 transitions. [2019-11-06 19:00:42,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-11-06 19:00:42,071 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:42,071 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 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 19:00:42,276 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:00:42,276 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:00:42,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:00:42,277 INFO L82 PathProgramCache]: Analyzing trace with hash -23696304, now seen corresponding path program 1 times [2019-11-06 19:00:42,277 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:00:42,277 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511085407] [2019-11-06 19:00:42,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:00:42,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:42,539 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:00:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:42,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:00:42,779 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511085407] [2019-11-06 19:00:42,779 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927696151] [2019-11-06 19:00:42,780 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 19:00:43,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:43,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 19:00:43,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:00:43,084 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 19:00:43,084 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:00:43,085 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:00:43,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65858339] [2019-11-06 19:00:43,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:00:43,086 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:00:43,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:00:43,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:00:43,087 INFO L87 Difference]: Start difference. First operand 3599 states and 5610 transitions. Second operand 11 states. [2019-11-06 19:00:43,320 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:00:43,628 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:00:44,045 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-11-06 19:00:44,438 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2019-11-06 19:00:46,903 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:00:55,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:00:55,629 INFO L93 Difference]: Finished difference Result 15053 states and 30169 transitions. [2019-11-06 19:00:55,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-06 19:00:55,629 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 191 [2019-11-06 19:00:55,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:00:55,758 INFO L225 Difference]: With dead ends: 15053 [2019-11-06 19:00:55,759 INFO L226 Difference]: Without dead ends: 11460 [2019-11-06 19:00:55,782 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=375, Invalid=1431, Unknown=0, NotChecked=0, Total=1806 [2019-11-06 19:00:55,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11460 states. [2019-11-06 19:00:56,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11460 to 11174. [2019-11-06 19:00:56,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11174 states. [2019-11-06 19:00:56,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11174 states to 11174 states and 18327 transitions. [2019-11-06 19:00:56,470 INFO L78 Accepts]: Start accepts. Automaton has 11174 states and 18327 transitions. Word has length 191 [2019-11-06 19:00:56,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:00:56,471 INFO L462 AbstractCegarLoop]: Abstraction has 11174 states and 18327 transitions. [2019-11-06 19:00:56,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:00:56,471 INFO L276 IsEmpty]: Start isEmpty. Operand 11174 states and 18327 transitions. [2019-11-06 19:00:56,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-11-06 19:00:56,533 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:56,533 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 19:00:56,737 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:00:56,737 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:00:56,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:00:56,739 INFO L82 PathProgramCache]: Analyzing trace with hash -124599840, now seen corresponding path program 1 times [2019-11-06 19:00:56,740 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:00:56,740 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032185135] [2019-11-06 19:00:56,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:00:56,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:57,068 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:00:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:57,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:57,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:57,253 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:00:57,253 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032185135] [2019-11-06 19:00:57,253 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923766459] [2019-11-06 19:00:57,254 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 19:00:57,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:57,454 INFO L256 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:00:57,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:00:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 19:00:57,512 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:00:57,513 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-11-06 19:00:57,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166136076] [2019-11-06 19:00:57,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:00:57,514 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:00:57,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:00:57,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:00:57,515 INFO L87 Difference]: Start difference. First operand 11174 states and 18327 transitions. Second operand 3 states.