/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_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:00:44,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:00:44,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:00:44,029 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:00:44,076 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:00:44,077 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:00:44,078 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:00:44,079 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 19:00:44,105 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:00:44,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:00:44,108 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:00:44,108 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:00:44,108 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:00:44,109 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:00:44,109 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:00:44,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:00:44,109 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:00:44,110 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:00:44,111 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:00:44,111 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:00:44,111 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:00:44,112 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:00:44,112 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:00:44,112 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:00:44,112 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:00:44,112 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:00:44,113 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:00:44,113 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:00:44,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:00:44,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:00:44,114 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:00:44,114 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:00:44,114 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:00:44,115 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:00:44,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:00:44,115 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:00:44,115 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:00:44,396 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:00:44,415 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:00:44,419 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:00:44,420 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:00:44,421 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:00:44,422 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label27.c [2019-11-06 19:00:44,496 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1f782263/60b4ff40224c4769bfbca11c5117103c/FLAGa882a8606 [2019-11-06 19:00:45,115 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:00:45,116 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label27.c [2019-11-06 19:00:45,132 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1f782263/60b4ff40224c4769bfbca11c5117103c/FLAGa882a8606 [2019-11-06 19:00:45,334 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1f782263/60b4ff40224c4769bfbca11c5117103c [2019-11-06 19:00:45,342 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:00:45,344 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:00:45,345 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:00:45,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:00:45,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:00:45,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:00:45" (1/1) ... [2019-11-06 19:00:45,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1edc095c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:45, skipping insertion in model container [2019-11-06 19:00:45,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:00:45" (1/1) ... [2019-11-06 19:00:45,363 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:00:45,449 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:00:46,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:00:46,345 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:00:46,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:00:46,595 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:00:46,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:46 WrapperNode [2019-11-06 19:00:46,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:00:46,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:00:46,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:00:46,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:00:46,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:46" (1/1) ... [2019-11-06 19:00:46,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:46" (1/1) ... [2019-11-06 19:00:46,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:46" (1/1) ... [2019-11-06 19:00:46,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:46" (1/1) ... [2019-11-06 19:00:46,730 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:46" (1/1) ... [2019-11-06 19:00:46,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:46" (1/1) ... [2019-11-06 19:00:46,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:46" (1/1) ... [2019-11-06 19:00:46,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:00:46,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:00:46,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:00:46,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:00:46,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:46" (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 19:00:46,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:00:46,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:00:46,839 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:00:46,839 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:00:46,839 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:00:46,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:00:46,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:00:46,840 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:00:46,840 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:00:46,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:00:46,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:00:48,881 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:00:48,881 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:00:48,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:00:48 BoogieIcfgContainer [2019-11-06 19:00:48,886 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:00:48,887 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:00:48,888 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:00:48,892 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:00:48,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:00:45" (1/3) ... [2019-11-06 19:00:48,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b9aa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:00:48, skipping insertion in model container [2019-11-06 19:00:48,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:46" (2/3) ... [2019-11-06 19:00:48,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b9aa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:00:48, skipping insertion in model container [2019-11-06 19:00:48,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:00:48" (3/3) ... [2019-11-06 19:00:48,901 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label27.c [2019-11-06 19:00:48,915 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:00:48,926 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:00:48,937 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:00:48,976 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:00:48,976 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:00:48,978 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:00:48,978 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:00:48,978 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:00:48,978 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:00:48,978 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:00:48,978 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:00:49,006 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-11-06 19:00:49,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-06 19:00:49,021 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:49,023 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] [2019-11-06 19:00:49,025 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:00:49,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:00:49,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1303003168, now seen corresponding path program 1 times [2019-11-06 19:00:49,040 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:00:49,041 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102043235] [2019-11-06 19:00:49,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:00:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:49,803 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:00:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:49,980 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 19:00:49,981 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102043235] [2019-11-06 19:00:49,982 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:00:49,982 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:00:49,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853491925] [2019-11-06 19:00:49,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:00:49,992 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:00:50,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:00:50,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:00:50,014 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-11-06 19:00:50,211 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:00:50,706 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-11-06 19:00:54,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:00:54,406 INFO L93 Difference]: Finished difference Result 1121 states and 2001 transitions. [2019-11-06 19:00:54,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:00:54,409 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 159 [2019-11-06 19:00:54,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:00:54,445 INFO L225 Difference]: With dead ends: 1121 [2019-11-06 19:00:54,445 INFO L226 Difference]: Without dead ends: 712 [2019-11-06 19:00:54,460 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:00:54,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2019-11-06 19:00:54,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 469. [2019-11-06 19:00:54,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2019-11-06 19:00:54,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 753 transitions. [2019-11-06 19:00:54,574 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 753 transitions. Word has length 159 [2019-11-06 19:00:54,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:00:54,576 INFO L462 AbstractCegarLoop]: Abstraction has 469 states and 753 transitions. [2019-11-06 19:00:54,576 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:00:54,576 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 753 transitions. [2019-11-06 19:00:54,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-11-06 19:00:54,583 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:54,583 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] [2019-11-06 19:00:54,584 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:00:54,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:00:54,584 INFO L82 PathProgramCache]: Analyzing trace with hash 436458787, now seen corresponding path program 1 times [2019-11-06 19:00:54,584 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:00:54,585 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072521083] [2019-11-06 19:00:54,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:00:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:54,848 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:00:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:54,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:55,039 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 19:00:55,039 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072521083] [2019-11-06 19:00:55,040 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:00:55,040 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:00:55,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993362041] [2019-11-06 19:00:55,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:00:55,042 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:00:55,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:00:55,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:00:55,043 INFO L87 Difference]: Start difference. First operand 469 states and 753 transitions. Second operand 8 states. [2019-11-06 19:00:55,247 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:00:58,096 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-11-06 19:00:58,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:00:58,657 INFO L93 Difference]: Finished difference Result 1416 states and 2361 transitions. [2019-11-06 19:00:58,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:00:58,657 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 168 [2019-11-06 19:00:58,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:00:58,667 INFO L225 Difference]: With dead ends: 1416 [2019-11-06 19:00:58,668 INFO L226 Difference]: Without dead ends: 953 [2019-11-06 19:00:58,671 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:00:58,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2019-11-06 19:00:58,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 908. [2019-11-06 19:00:58,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 908 states. [2019-11-06 19:00:58,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1448 transitions. [2019-11-06 19:00:58,765 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1448 transitions. Word has length 168 [2019-11-06 19:00:58,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:00:58,768 INFO L462 AbstractCegarLoop]: Abstraction has 908 states and 1448 transitions. [2019-11-06 19:00:58,768 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:00:58,768 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1448 transitions. [2019-11-06 19:00:58,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-11-06 19:00:58,785 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:58,785 INFO L410 BasicCegarLoop]: trace histogram [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, 1] [2019-11-06 19:00:58,785 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:00:58,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:00:58,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1302221225, now seen corresponding path program 1 times [2019-11-06 19:00:58,787 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:00:58,787 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046644708] [2019-11-06 19:00:58,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:00:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:59,044 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:00:59,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:59,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:00:59,247 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046644708] [2019-11-06 19:00:59,247 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:00:59,247 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:00:59,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434805425] [2019-11-06 19:00:59,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:00:59,248 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:00:59,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:00:59,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:00:59,249 INFO L87 Difference]: Start difference. First operand 908 states and 1448 transitions. Second operand 8 states. [2019-11-06 19:00:59,465 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:00:59,806 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:01:00,190 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-11-06 19:01:03,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:03,955 INFO L93 Difference]: Finished difference Result 3573 states and 5952 transitions. [2019-11-06 19:01:03,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:01:03,959 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 169 [2019-11-06 19:01:03,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:03,978 INFO L225 Difference]: With dead ends: 3573 [2019-11-06 19:01:03,979 INFO L226 Difference]: Without dead ends: 2671 [2019-11-06 19:01:03,983 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2019-11-06 19:01:03,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2671 states. [2019-11-06 19:01:04,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2671 to 2636. [2019-11-06 19:01:04,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2636 states. [2019-11-06 19:01:04,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 4006 transitions. [2019-11-06 19:01:04,117 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 4006 transitions. Word has length 169 [2019-11-06 19:01:04,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:04,118 INFO L462 AbstractCegarLoop]: Abstraction has 2636 states and 4006 transitions. [2019-11-06 19:01:04,118 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:01:04,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 4006 transitions. [2019-11-06 19:01:04,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-06 19:01:04,127 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:04,128 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] [2019-11-06 19:01:04,128 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:04,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:04,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1015492916, now seen corresponding path program 1 times [2019-11-06 19:01:04,129 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:04,129 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249243824] [2019-11-06 19:01:04,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:04,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:04,504 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:04,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:04,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:04,687 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 19:01:04,688 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249243824] [2019-11-06 19:01:04,688 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171068810] [2019-11-06 19:01:04,688 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 19:01:04,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:04,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:01:04,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:01:05,040 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 19:01:05,041 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:01:05,041 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2019-11-06 19:01:05,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741762973] [2019-11-06 19:01:05,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:01:05,042 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:05,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:01:05,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:01:05,043 INFO L87 Difference]: Start difference. First operand 2636 states and 4006 transitions. Second operand 5 states. [2019-11-06 19:01:06,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:06,648 INFO L93 Difference]: Finished difference Result 8000 states and 12959 transitions. [2019-11-06 19:01:06,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:01:06,648 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 171 [2019-11-06 19:01:06,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:06,685 INFO L225 Difference]: With dead ends: 8000 [2019-11-06 19:01:06,685 INFO L226 Difference]: Without dead ends: 5370 [2019-11-06 19:01:06,693 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:01:06,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5370 states. [2019-11-06 19:01:06,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5370 to 5308. [2019-11-06 19:01:06,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5308 states. [2019-11-06 19:01:06,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5308 states to 5308 states and 8266 transitions. [2019-11-06 19:01:06,904 INFO L78 Accepts]: Start accepts. Automaton has 5308 states and 8266 transitions. Word has length 171 [2019-11-06 19:01:06,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:06,906 INFO L462 AbstractCegarLoop]: Abstraction has 5308 states and 8266 transitions. [2019-11-06 19:01:06,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:01:06,907 INFO L276 IsEmpty]: Start isEmpty. Operand 5308 states and 8266 transitions. [2019-11-06 19:01:06,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-06 19:01:06,929 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:06,930 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:01:07,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:01:07,137 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:07,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:07,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1082780184, now seen corresponding path program 1 times [2019-11-06 19:01:07,138 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:07,138 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854354140] [2019-11-06 19:01:07,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:07,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:07,561 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:07,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:07,686 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-06 19:01:07,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:07,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:07,749 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854354140] [2019-11-06 19:01:07,749 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274011726] [2019-11-06 19:01:07,749 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 19:01:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:07,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:01:07,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:01:07,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:07,987 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:01:07,987 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-11-06 19:01:07,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152177811] [2019-11-06 19:01:07,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:01:07,989 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:07,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:01:07,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:01:07,990 INFO L87 Difference]: Start difference. First operand 5308 states and 8266 transitions. Second operand 3 states. [2019-11-06 19:01:09,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:09,340 INFO L93 Difference]: Finished difference Result 15348 states and 24715 transitions. [2019-11-06 19:01:09,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:01:09,341 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 173 [2019-11-06 19:01:09,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:09,395 INFO L225 Difference]: With dead ends: 15348 [2019-11-06 19:01:09,396 INFO L226 Difference]: Without dead ends: 10046 [2019-11-06 19:01:09,414 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:01:09,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10046 states. [2019-11-06 19:01:09,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10046 to 10030. [2019-11-06 19:01:09,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10030 states. [2019-11-06 19:01:09,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10030 states to 10030 states and 15540 transitions. [2019-11-06 19:01:09,762 INFO L78 Accepts]: Start accepts. Automaton has 10030 states and 15540 transitions. Word has length 173 [2019-11-06 19:01:09,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:09,764 INFO L462 AbstractCegarLoop]: Abstraction has 10030 states and 15540 transitions. [2019-11-06 19:01:09,765 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:01:09,765 INFO L276 IsEmpty]: Start isEmpty. Operand 10030 states and 15540 transitions. [2019-11-06 19:01:09,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-11-06 19:01:09,794 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:09,795 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1] [2019-11-06 19:01:10,000 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:01:10,001 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:10,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:10,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1343685801, now seen corresponding path program 1 times [2019-11-06 19:01:10,010 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:10,012 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850824750] [2019-11-06 19:01:10,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:10,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:10,198 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:10,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:10,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:10,364 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850824750] [2019-11-06 19:01:10,364 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:01:10,364 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:01:10,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112855104] [2019-11-06 19:01:10,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:01:10,365 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:10,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:01:10,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:01:10,366 INFO L87 Difference]: Start difference. First operand 10030 states and 15540 transitions. Second operand 9 states. [2019-11-06 19:01:10,514 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:01:10,975 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:01:11,335 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-11-06 19:01:15,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:15,394 INFO L93 Difference]: Finished difference Result 36208 states and 60113 transitions. [2019-11-06 19:01:15,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:01:15,395 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 178 [2019-11-06 19:01:15,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:15,530 INFO L225 Difference]: With dead ends: 36208 [2019-11-06 19:01:15,530 INFO L226 Difference]: Without dead ends: 26184 [2019-11-06 19:01:15,571 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:01:15,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26184 states. [2019-11-06 19:01:16,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26184 to 26008. [2019-11-06 19:01:16,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26008 states. [2019-11-06 19:01:16,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26008 states to 26008 states and 38650 transitions. [2019-11-06 19:01:16,426 INFO L78 Accepts]: Start accepts. Automaton has 26008 states and 38650 transitions. Word has length 178 [2019-11-06 19:01:16,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:16,426 INFO L462 AbstractCegarLoop]: Abstraction has 26008 states and 38650 transitions. [2019-11-06 19:01:16,426 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:01:16,426 INFO L276 IsEmpty]: Start isEmpty. Operand 26008 states and 38650 transitions. [2019-11-06 19:01:16,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-11-06 19:01:16,483 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:16,484 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:01:16,484 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:16,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:16,484 INFO L82 PathProgramCache]: Analyzing trace with hash 601297791, now seen corresponding path program 1 times [2019-11-06 19:01:16,485 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:16,485 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413678399] [2019-11-06 19:01:16,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:16,885 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:17,101 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:17,102 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413678399] [2019-11-06 19:01:17,103 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:01:17,103 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:01:17,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522943981] [2019-11-06 19:01:17,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:01:17,105 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:17,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:01:17,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:01:17,105 INFO L87 Difference]: Start difference. First operand 26008 states and 38650 transitions. Second operand 9 states. [2019-11-06 19:01:17,250 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:01:17,748 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 129