/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/Problem16_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:19:04,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:19:04,048 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:19:04,065 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:19:04,066 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:19:04,067 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:19:04,069 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:19:04,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:19:04,082 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:19:04,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:19:04,087 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:19:04,089 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:19:04,089 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:19:04,091 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:19:04,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:19:04,095 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:19:04,096 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:19:04,098 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:19:04,099 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:19:04,104 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:19:04,108 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:19:04,111 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:19:04,113 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:19:04,114 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:19:04,116 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:19:04,124 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:19:04,124 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:19:04,125 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:19:04,126 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 19:19:04,140 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:19:04,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:19:04,141 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:19:04,141 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:19:04,142 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:19:04,142 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:19:04,142 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:19:04,142 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:19:04,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:19:04,143 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:19:04,143 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:19:04,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:19:04,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:19:04,143 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:19:04,143 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:19:04,144 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:19:04,144 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:19:04,144 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:19:04,144 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:19:04,144 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:19:04,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:19:04,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:19:04,145 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:19:04,145 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:19:04,145 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:19:04,146 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:19:04,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:19:04,146 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:19:04,146 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:19:04,448 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:19:04,465 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:19:04,470 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:19:04,472 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:19:04,472 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:19:04,473 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label50.c [2019-11-06 19:19:04,556 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/093876538/f1019598e9884ed8a5b75ad818d48848/FLAGf73353b3a [2019-11-06 19:19:05,242 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:19:05,242 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label50.c [2019-11-06 19:19:05,264 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/093876538/f1019598e9884ed8a5b75ad818d48848/FLAGf73353b3a [2019-11-06 19:19:05,412 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/093876538/f1019598e9884ed8a5b75ad818d48848 [2019-11-06 19:19:05,420 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:19:05,422 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:19:05,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:19:05,423 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:19:05,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:19:05,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:19:05" (1/1) ... [2019-11-06 19:19:05,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e24176a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:05, skipping insertion in model container [2019-11-06 19:19:05,431 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:19:05" (1/1) ... [2019-11-06 19:19:05,439 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:19:05,513 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:19:06,324 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:19:06,330 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:19:06,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:19:06,576 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:19:06,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:06 WrapperNode [2019-11-06 19:19:06,577 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:19:06,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:19:06,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:19:06,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:19:06,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:06" (1/1) ... [2019-11-06 19:19:06,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:06" (1/1) ... [2019-11-06 19:19:06,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:06" (1/1) ... [2019-11-06 19:19:06,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:06" (1/1) ... [2019-11-06 19:19:06,694 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:06" (1/1) ... [2019-11-06 19:19:06,714 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:06" (1/1) ... [2019-11-06 19:19:06,738 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:06" (1/1) ... [2019-11-06 19:19:06,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:19:06,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:19:06,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:19:06,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:19:06,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:06" (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 19:19:06,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:19:06,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:19:06,823 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:19:06,824 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:19:06,824 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:19:06,825 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:19:06,825 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:19:06,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:19:06,826 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:19:06,826 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:19:06,826 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:19:06,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:19:06,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:19:09,232 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:19:09,232 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:19:09,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:19:09 BoogieIcfgContainer [2019-11-06 19:19:09,237 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:19:09,238 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:19:09,239 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:19:09,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:19:09,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:19:05" (1/3) ... [2019-11-06 19:19:09,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6813a2b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:19:09, skipping insertion in model container [2019-11-06 19:19:09,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:06" (2/3) ... [2019-11-06 19:19:09,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6813a2b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:19:09, skipping insertion in model container [2019-11-06 19:19:09,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:19:09" (3/3) ... [2019-11-06 19:19:09,256 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label50.c [2019-11-06 19:19:09,267 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:19:09,277 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:19:09,288 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:19:09,337 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:19:09,337 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:19:09,337 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:19:09,338 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:19:09,338 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:19:09,338 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:19:09,338 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:19:09,338 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:19:09,375 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 19:19:09,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-06 19:19:09,384 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:09,385 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] [2019-11-06 19:19:09,388 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:09,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:09,394 INFO L82 PathProgramCache]: Analyzing trace with hash 789303234, now seen corresponding path program 1 times [2019-11-06 19:19:09,403 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:09,403 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354839382] [2019-11-06 19:19:09,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:09,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:09,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:09,727 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 19:19:09,728 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354839382] [2019-11-06 19:19:09,729 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:19:09,730 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:19:09,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100795375] [2019-11-06 19:19:09,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:19:09,737 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:09,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:19:09,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:19:09,755 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-11-06 19:19:15,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:15,202 INFO L93 Difference]: Finished difference Result 1530 states and 2865 transitions. [2019-11-06 19:19:15,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:19:15,208 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2019-11-06 19:19:15,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:15,253 INFO L225 Difference]: With dead ends: 1530 [2019-11-06 19:19:15,253 INFO L226 Difference]: Without dead ends: 1038 [2019-11-06 19:19:15,272 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:19:15,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-11-06 19:19:15,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-11-06 19:19:15,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-11-06 19:19:15,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1751 transitions. [2019-11-06 19:19:15,398 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1751 transitions. Word has length 51 [2019-11-06 19:19:15,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:15,399 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1751 transitions. [2019-11-06 19:19:15,399 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:19:15,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1751 transitions. [2019-11-06 19:19:15,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-06 19:19:15,406 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:15,406 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:19:15,407 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:15,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:15,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1245214242, now seen corresponding path program 1 times [2019-11-06 19:19:15,407 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:15,408 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723434866] [2019-11-06 19:19:15,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:15,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:15,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:19:15,682 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723434866] [2019-11-06 19:19:15,682 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:19:15,682 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:19:15,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667667995] [2019-11-06 19:19:15,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:19:15,685 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:15,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:19:15,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:19:15,686 INFO L87 Difference]: Start difference. First operand 1031 states and 1751 transitions. Second operand 9 states. [2019-11-06 19:19:20,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:20,401 INFO L93 Difference]: Finished difference Result 3130 states and 5428 transitions. [2019-11-06 19:19:20,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:19:20,402 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 121 [2019-11-06 19:19:20,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:20,445 INFO L225 Difference]: With dead ends: 3130 [2019-11-06 19:19:20,446 INFO L226 Difference]: Without dead ends: 2105 [2019-11-06 19:19:20,452 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:19:20,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2019-11-06 19:19:20,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 2073. [2019-11-06 19:19:20,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2073 states. [2019-11-06 19:19:20,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 3396 transitions. [2019-11-06 19:19:20,581 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 3396 transitions. Word has length 121 [2019-11-06 19:19:20,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:20,582 INFO L462 AbstractCegarLoop]: Abstraction has 2073 states and 3396 transitions. [2019-11-06 19:19:20,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:19:20,583 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 3396 transitions. [2019-11-06 19:19:20,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-06 19:19:20,587 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:20,587 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:19:20,587 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:20,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:20,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1384987622, now seen corresponding path program 1 times [2019-11-06 19:19:20,588 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:20,588 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396873841] [2019-11-06 19:19:20,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:20,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:20,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:21,013 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:19:21,014 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396873841] [2019-11-06 19:19:21,014 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:19:21,014 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:19:21,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475138914] [2019-11-06 19:19:21,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:19:21,019 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:21,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:19:21,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:19:21,021 INFO L87 Difference]: Start difference. First operand 2073 states and 3396 transitions. Second operand 9 states. [2019-11-06 19:19:26,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:26,481 INFO L93 Difference]: Finished difference Result 7992 states and 13707 transitions. [2019-11-06 19:19:26,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:19:26,481 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 149 [2019-11-06 19:19:26,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:26,520 INFO L225 Difference]: With dead ends: 7992 [2019-11-06 19:19:26,520 INFO L226 Difference]: Without dead ends: 5925 [2019-11-06 19:19:26,528 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:19:26,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5925 states. [2019-11-06 19:19:26,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5925 to 5898. [2019-11-06 19:19:26,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5898 states. [2019-11-06 19:19:26,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5898 states to 5898 states and 8923 transitions. [2019-11-06 19:19:26,697 INFO L78 Accepts]: Start accepts. Automaton has 5898 states and 8923 transitions. Word has length 149 [2019-11-06 19:19:26,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:26,697 INFO L462 AbstractCegarLoop]: Abstraction has 5898 states and 8923 transitions. [2019-11-06 19:19:26,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:19:26,698 INFO L276 IsEmpty]: Start isEmpty. Operand 5898 states and 8923 transitions. [2019-11-06 19:19:26,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-11-06 19:19:26,701 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:26,701 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:19:26,702 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:26,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:26,702 INFO L82 PathProgramCache]: Analyzing trace with hash -992170262, now seen corresponding path program 1 times [2019-11-06 19:19:26,702 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:26,703 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499388036] [2019-11-06 19:19:26,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:26,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:26,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:26,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:26,971 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:19:26,971 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499388036] [2019-11-06 19:19:26,971 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:19:26,972 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:19:26,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804619033] [2019-11-06 19:19:26,972 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:19:26,973 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:26,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:19:26,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:19:26,973 INFO L87 Difference]: Start difference. First operand 5898 states and 8923 transitions. Second operand 9 states. [2019-11-06 19:19:30,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:30,701 INFO L93 Difference]: Finished difference Result 14973 states and 23283 transitions. [2019-11-06 19:19:30,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:19:30,709 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 189 [2019-11-06 19:19:30,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:30,754 INFO L225 Difference]: With dead ends: 14973 [2019-11-06 19:19:30,754 INFO L226 Difference]: Without dead ends: 9081 [2019-11-06 19:19:30,771 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:19:30,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9081 states. [2019-11-06 19:19:31,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9081 to 9011. [2019-11-06 19:19:31,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9011 states. [2019-11-06 19:19:31,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9011 states to 9011 states and 11768 transitions. [2019-11-06 19:19:31,042 INFO L78 Accepts]: Start accepts. Automaton has 9011 states and 11768 transitions. Word has length 189 [2019-11-06 19:19:31,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:31,044 INFO L462 AbstractCegarLoop]: Abstraction has 9011 states and 11768 transitions. [2019-11-06 19:19:31,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:19:31,044 INFO L276 IsEmpty]: Start isEmpty. Operand 9011 states and 11768 transitions. [2019-11-06 19:19:31,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2019-11-06 19:19:31,052 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:31,052 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:19:31,053 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:31,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:31,053 INFO L82 PathProgramCache]: Analyzing trace with hash -64771593, now seen corresponding path program 1 times [2019-11-06 19:19:31,053 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:31,054 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167123737] [2019-11-06 19:19:31,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:31,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:31,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:31,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:31,499 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 19:19:31,499 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167123737] [2019-11-06 19:19:31,500 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665970095] [2019-11-06 19:19:31,500 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 19:19:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:31,670 INFO L256 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:19:31,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:31,916 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 19:19:31,916 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:19:31,917 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:19:31,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729818994] [2019-11-06 19:19:31,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:19:31,918 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:31,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:19:31,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:19:31,919 INFO L87 Difference]: Start difference. First operand 9011 states and 11768 transitions. Second operand 3 states. [2019-11-06 19:19:34,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:34,366 INFO L93 Difference]: Finished difference Result 21065 states and 27822 transitions. [2019-11-06 19:19:34,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:19:34,376 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 370 [2019-11-06 19:19:34,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:34,444 INFO L225 Difference]: With dead ends: 21065 [2019-11-06 19:19:34,445 INFO L226 Difference]: Without dead ends: 12060 [2019-11-06 19:19:34,469 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 375 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:19:34,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12060 states. [2019-11-06 19:19:34,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12060 to 11382. [2019-11-06 19:19:34,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11382 states. [2019-11-06 19:19:34,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11382 states to 11382 states and 14471 transitions. [2019-11-06 19:19:34,823 INFO L78 Accepts]: Start accepts. Automaton has 11382 states and 14471 transitions. Word has length 370 [2019-11-06 19:19:34,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:34,824 INFO L462 AbstractCegarLoop]: Abstraction has 11382 states and 14471 transitions. [2019-11-06 19:19:34,824 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:19:34,825 INFO L276 IsEmpty]: Start isEmpty. Operand 11382 states and 14471 transitions. [2019-11-06 19:19:34,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2019-11-06 19:19:34,839 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:34,839 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:19:35,052 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:35,052 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:35,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:35,053 INFO L82 PathProgramCache]: Analyzing trace with hash -69990070, now seen corresponding path program 1 times [2019-11-06 19:19:35,053 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:35,053 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791438103] [2019-11-06 19:19:35,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:35,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:35,847 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 248 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:19:35,847 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791438103] [2019-11-06 19:19:35,847 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947110847] [2019-11-06 19:19:35,848 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 19:19:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:36,009 INFO L256 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:19:36,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:36,222 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 249 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:19:36,223 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:19:36,223 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:19:36,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628987157] [2019-11-06 19:19:36,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:19:36,225 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:36,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:19:36,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:19:36,226 INFO L87 Difference]: Start difference. First operand 11382 states and 14471 transitions. Second operand 11 states.