/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/Problem11_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:10:18,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:10:18,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:10:18,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:10:18,694 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:10:18,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:10:18,696 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:10:18,697 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:10:18,698 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:10:18,699 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:10:18,701 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:10:18,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:10:18,705 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:10:18,706 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:10:18,707 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:10:18,710 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:10:18,712 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:10:18,729 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:10:18,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:10:18,733 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:10:18,735 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 19:10:18,757 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:10:18,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:10:18,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:10:18,761 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:10:18,761 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:10:18,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:10:18,761 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:10:18,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:10:18,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:10:18,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:10:18,763 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:10:18,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:10:18,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:10:18,764 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:10:18,764 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:10:18,764 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:10:18,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:10:18,765 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:10:18,765 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:10:18,765 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:10:18,765 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:10:18,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:10:18,766 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:10:18,766 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:10:18,766 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:10:18,767 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:10:18,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:10:18,767 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:10:18,767 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:10:19,041 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:10:19,054 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:10:19,058 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:10:19,059 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:10:19,059 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:10:19,060 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label53.c [2019-11-06 19:10:19,122 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc47255e0/33f594304fb847cbb7738202fdb407c0/FLAG2ba749e20 [2019-11-06 19:10:19,681 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:10:19,683 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label53.c [2019-11-06 19:10:19,701 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc47255e0/33f594304fb847cbb7738202fdb407c0/FLAG2ba749e20 [2019-11-06 19:10:19,973 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc47255e0/33f594304fb847cbb7738202fdb407c0 [2019-11-06 19:10:19,994 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:10:20,001 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:10:20,010 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:10:20,011 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:10:20,016 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:10:20,017 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:10:19" (1/1) ... [2019-11-06 19:10:20,022 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1816c29f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:20, skipping insertion in model container [2019-11-06 19:10:20,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:10:19" (1/1) ... [2019-11-06 19:10:20,031 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:10:20,106 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:10:20,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:10:20,757 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:10:20,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:10:20,999 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:10:21,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:20 WrapperNode [2019-11-06 19:10:21,001 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:10:21,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:10:21,002 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:10:21,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:10:21,017 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:20" (1/1) ... [2019-11-06 19:10:21,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:20" (1/1) ... [2019-11-06 19:10:21,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:20" (1/1) ... [2019-11-06 19:10:21,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:20" (1/1) ... [2019-11-06 19:10:21,136 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:20" (1/1) ... [2019-11-06 19:10:21,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:20" (1/1) ... [2019-11-06 19:10:21,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:20" (1/1) ... [2019-11-06 19:10:21,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:10:21,187 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:10:21,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:10:21,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:10:21,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:20" (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 19:10:21,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:10:21,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:10:21,270 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:10:21,270 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:10:21,270 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:10:21,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:10:21,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:10:21,271 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:10:21,272 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:10:21,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:10:21,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:10:23,088 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:10:23,089 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:10:23,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:10:23 BoogieIcfgContainer [2019-11-06 19:10:23,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:10:23,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:10:23,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:10:23,096 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:10:23,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:10:19" (1/3) ... [2019-11-06 19:10:23,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68dbb60f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:10:23, skipping insertion in model container [2019-11-06 19:10:23,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:20" (2/3) ... [2019-11-06 19:10:23,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68dbb60f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:10:23, skipping insertion in model container [2019-11-06 19:10:23,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:10:23" (3/3) ... [2019-11-06 19:10:23,100 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label53.c [2019-11-06 19:10:23,111 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:10:23,123 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:10:23,136 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:10:23,175 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:10:23,176 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:10:23,176 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:10:23,176 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:10:23,176 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:10:23,177 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:10:23,177 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:10:23,177 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:10:23,210 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 19:10:23,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-06 19:10:23,220 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:10:23,221 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] [2019-11-06 19:10:23,223 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:10:23,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:10:23,229 INFO L82 PathProgramCache]: Analyzing trace with hash 640789778, now seen corresponding path program 1 times [2019-11-06 19:10:23,265 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:10:23,266 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547048576] [2019-11-06 19:10:23,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:10:23,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:23,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:23,645 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 19:10:23,646 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547048576] [2019-11-06 19:10:23,647 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:10:23,647 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:10:23,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807843554] [2019-11-06 19:10:23,653 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:10:23,654 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:10:23,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:10:23,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:10:23,671 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-11-06 19:10:27,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:10:27,452 INFO L93 Difference]: Finished difference Result 1009 states and 1797 transitions. [2019-11-06 19:10:27,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:10:27,456 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2019-11-06 19:10:27,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:10:27,482 INFO L225 Difference]: With dead ends: 1009 [2019-11-06 19:10:27,482 INFO L226 Difference]: Without dead ends: 633 [2019-11-06 19:10:27,498 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:10:27,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2019-11-06 19:10:27,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 626. [2019-11-06 19:10:27,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-11-06 19:10:27,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 903 transitions. [2019-11-06 19:10:27,605 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 903 transitions. Word has length 53 [2019-11-06 19:10:27,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:10:27,606 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 903 transitions. [2019-11-06 19:10:27,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:10:27,606 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 903 transitions. [2019-11-06 19:10:27,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-06 19:10:27,614 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:10:27,614 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:10:27,614 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:10:27,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:10:27,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1201480114, now seen corresponding path program 1 times [2019-11-06 19:10:27,615 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:10:27,616 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008852562] [2019-11-06 19:10:27,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:10:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:27,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:10:27,995 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008852562] [2019-11-06 19:10:27,995 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:10:27,995 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:10:27,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399775307] [2019-11-06 19:10:27,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:10:27,998 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:10:27,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:10:27,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:10:27,999 INFO L87 Difference]: Start difference. First operand 626 states and 903 transitions. Second operand 9 states. [2019-11-06 19:10:31,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:10:31,247 INFO L93 Difference]: Finished difference Result 2436 states and 3670 transitions. [2019-11-06 19:10:31,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:10:31,248 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 125 [2019-11-06 19:10:31,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:10:31,267 INFO L225 Difference]: With dead ends: 2436 [2019-11-06 19:10:31,267 INFO L226 Difference]: Without dead ends: 1816 [2019-11-06 19:10:31,270 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:10:31,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2019-11-06 19:10:31,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1777. [2019-11-06 19:10:31,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1777 states. [2019-11-06 19:10:31,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 2525 transitions. [2019-11-06 19:10:31,370 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 2525 transitions. Word has length 125 [2019-11-06 19:10:31,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:10:31,372 INFO L462 AbstractCegarLoop]: Abstraction has 1777 states and 2525 transitions. [2019-11-06 19:10:31,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:10:31,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 2525 transitions. [2019-11-06 19:10:31,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-11-06 19:10:31,391 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:10:31,392 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:10:31,392 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:10:31,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:10:31,392 INFO L82 PathProgramCache]: Analyzing trace with hash -232900683, now seen corresponding path program 1 times [2019-11-06 19:10:31,393 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:10:31,393 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630283692] [2019-11-06 19:10:31,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:10:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:31,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:31,986 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 115 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:10:31,987 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630283692] [2019-11-06 19:10:31,987 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550144229] [2019-11-06 19:10:31,987 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 19:10:32,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:32,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:10:32,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:10:32,240 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:10:32,366 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-06 19:10:32,366 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:10:32,367 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2019-11-06 19:10:32,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838785896] [2019-11-06 19:10:32,374 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:10:32,376 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:10:32,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:10:32,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:10:32,377 INFO L87 Difference]: Start difference. First operand 1777 states and 2525 transitions. Second operand 5 states. [2019-11-06 19:10:34,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:10:34,121 INFO L93 Difference]: Finished difference Result 4179 states and 5943 transitions. [2019-11-06 19:10:34,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:10:34,122 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 228 [2019-11-06 19:10:34,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:10:34,134 INFO L225 Difference]: With dead ends: 4179 [2019-11-06 19:10:34,135 INFO L226 Difference]: Without dead ends: 2408 [2019-11-06 19:10:34,139 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:10:34,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2019-11-06 19:10:34,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 2200. [2019-11-06 19:10:34,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2200 states. [2019-11-06 19:10:34,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 3047 transitions. [2019-11-06 19:10:34,211 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 3047 transitions. Word has length 228 [2019-11-06 19:10:34,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:10:34,211 INFO L462 AbstractCegarLoop]: Abstraction has 2200 states and 3047 transitions. [2019-11-06 19:10:34,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:10:34,211 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 3047 transitions. [2019-11-06 19:10:34,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2019-11-06 19:10:34,218 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:10:34,218 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:10:34,423 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:10:34,424 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:10:34,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:10:34,425 INFO L82 PathProgramCache]: Analyzing trace with hash -701389057, now seen corresponding path program 1 times [2019-11-06 19:10:34,425 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:10:34,426 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664248663] [2019-11-06 19:10:34,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:10:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:34,817 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-06 19:10:34,817 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664248663] [2019-11-06 19:10:34,817 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68437748] [2019-11-06 19:10:34,818 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 19:10:34,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:34,951 INFO L256 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 19:10:34,978 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:10:35,004 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:10:35,006 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:10:35,095 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:10:36,949 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:10:36,950 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:10:36,950 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:10:36,952 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:10:36,953 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:10:36,953 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:10:36,955 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:10:36,956 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:10:37,603 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-11-06 19:10:37,603 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:10:37,603 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2019-11-06 19:10:37,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773048617] [2019-11-06 19:10:37,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 19:10:37,605 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:10:37,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 19:10:37,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=88, Unknown=1, NotChecked=0, Total=132 [2019-11-06 19:10:37,606 INFO L87 Difference]: Start difference. First operand 2200 states and 3047 transitions. Second operand 12 states. [2019-11-06 19:10:42,304 WARN L191 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 34