/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_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:18:15,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:18:15,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:18:15,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:18:15,195 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:18:15,196 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:18:15,197 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:18:15,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:18:15,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:18:15,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:18:15,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:18:15,204 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:18:15,205 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:18:15,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:18:15,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:18:15,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:18:15,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:18:15,218 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:18:15,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:18:15,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:18:15,224 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 19:18:15,250 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:18:15,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:18:15,252 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:18:15,253 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:18:15,253 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:18:15,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:18:15,253 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:18:15,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:18:15,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:18:15,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:18:15,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:18:15,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:18:15,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:18:15,256 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:18:15,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:18:15,256 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:18:15,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:18:15,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:18:15,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:18:15,257 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:18:15,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:18:15,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:18:15,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:18:15,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:18:15,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:18:15,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:18:15,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:18:15,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:18:15,259 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:18:15,538 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:18:15,557 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:18:15,560 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:18:15,561 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:18:15,561 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:18:15,562 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label26.c [2019-11-06 19:18:15,632 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/414d1357e/5afd1019ba4645b5951c824bab31779f/FLAG21d88d498 [2019-11-06 19:18:16,308 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:18:16,309 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label26.c [2019-11-06 19:18:16,329 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/414d1357e/5afd1019ba4645b5951c824bab31779f/FLAG21d88d498 [2019-11-06 19:18:16,491 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/414d1357e/5afd1019ba4645b5951c824bab31779f [2019-11-06 19:18:16,500 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:18:16,502 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:18:16,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:18:16,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:18:16,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:18:16,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:18:16" (1/1) ... [2019-11-06 19:18:16,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ec017b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:16, skipping insertion in model container [2019-11-06 19:18:16,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:18:16" (1/1) ... [2019-11-06 19:18:16,517 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:18:16,591 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:18:17,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:18:17,497 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:18:17,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:18:17,842 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:18:17,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:17 WrapperNode [2019-11-06 19:18:17,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:18:17,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:18:17,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:18:17,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:18:17,862 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:17" (1/1) ... [2019-11-06 19:18:17,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:17" (1/1) ... [2019-11-06 19:18:17,905 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:17" (1/1) ... [2019-11-06 19:18:17,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:17" (1/1) ... [2019-11-06 19:18:17,968 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:17" (1/1) ... [2019-11-06 19:18:17,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:17" (1/1) ... [2019-11-06 19:18:18,012 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:17" (1/1) ... [2019-11-06 19:18:18,026 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:18:18,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:18:18,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:18:18,027 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:18:18,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:17" (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 19:18:18,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:18:18,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:18:18,090 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:18:18,090 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:18:18,090 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:18:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:18:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:18:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:18:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:18:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:18:18,092 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:18:18,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:18:18,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:18:20,425 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:18:20,426 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:18:20,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:18:20 BoogieIcfgContainer [2019-11-06 19:18:20,427 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:18:20,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:18:20,429 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:18:20,432 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:18:20,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:18:16" (1/3) ... [2019-11-06 19:18:20,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e8f944f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:18:20, skipping insertion in model container [2019-11-06 19:18:20,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:17" (2/3) ... [2019-11-06 19:18:20,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e8f944f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:18:20, skipping insertion in model container [2019-11-06 19:18:20,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:18:20" (3/3) ... [2019-11-06 19:18:20,437 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label26.c [2019-11-06 19:18:20,448 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:18:20,458 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:18:20,471 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:18:20,513 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:18:20,514 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:18:20,514 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:18:20,514 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:18:20,514 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:18:20,514 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:18:20,514 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:18:20,515 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:18:20,546 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 19:18:20,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-06 19:18:20,556 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:20,557 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] [2019-11-06 19:18:20,559 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:20,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:20,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1586905158, now seen corresponding path program 1 times [2019-11-06 19:18:20,574 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:20,574 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402981841] [2019-11-06 19:18:20,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:20,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:21,001 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 19:18:21,002 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402981841] [2019-11-06 19:18:21,003 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:18:21,003 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:18:21,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574420115] [2019-11-06 19:18:21,010 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:18:21,011 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:21,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:18:21,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:18:21,028 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-11-06 19:18:26,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:26,255 INFO L93 Difference]: Finished difference Result 1515 states and 2850 transitions. [2019-11-06 19:18:26,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:18:26,256 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2019-11-06 19:18:26,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:26,283 INFO L225 Difference]: With dead ends: 1515 [2019-11-06 19:18:26,283 INFO L226 Difference]: Without dead ends: 1038 [2019-11-06 19:18:26,296 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:18:26,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-11-06 19:18:26,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-11-06 19:18:26,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-11-06 19:18:26,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1607 transitions. [2019-11-06 19:18:26,437 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1607 transitions. Word has length 41 [2019-11-06 19:18:26,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:26,439 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1607 transitions. [2019-11-06 19:18:26,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:18:26,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1607 transitions. [2019-11-06 19:18:26,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-06 19:18:26,449 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:26,450 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:18:26,451 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:26,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:26,452 INFO L82 PathProgramCache]: Analyzing trace with hash 904307166, now seen corresponding path program 1 times [2019-11-06 19:18:26,452 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:26,452 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114380656] [2019-11-06 19:18:26,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:26,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:26,847 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:18:26,848 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114380656] [2019-11-06 19:18:26,848 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:18:26,848 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:18:26,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867263185] [2019-11-06 19:18:26,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:18:26,851 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:26,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:18:26,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:18:26,852 INFO L87 Difference]: Start difference. First operand 1031 states and 1607 transitions. Second operand 9 states. [2019-11-06 19:18:32,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:32,691 INFO L93 Difference]: Finished difference Result 4159 states and 6655 transitions. [2019-11-06 19:18:32,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:18:32,693 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 113 [2019-11-06 19:18:32,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:32,718 INFO L225 Difference]: With dead ends: 4159 [2019-11-06 19:18:32,718 INFO L226 Difference]: Without dead ends: 3134 [2019-11-06 19:18:32,723 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:18:32,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3134 states. [2019-11-06 19:18:32,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3134 to 3113. [2019-11-06 19:18:32,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3113 states. [2019-11-06 19:18:32,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3113 states to 3113 states and 4592 transitions. [2019-11-06 19:18:32,898 INFO L78 Accepts]: Start accepts. Automaton has 3113 states and 4592 transitions. Word has length 113 [2019-11-06 19:18:32,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:32,899 INFO L462 AbstractCegarLoop]: Abstraction has 3113 states and 4592 transitions. [2019-11-06 19:18:32,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:18:32,899 INFO L276 IsEmpty]: Start isEmpty. Operand 3113 states and 4592 transitions. [2019-11-06 19:18:32,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2019-11-06 19:18:32,908 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:32,909 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:18:32,909 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:32,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:32,910 INFO L82 PathProgramCache]: Analyzing trace with hash 953159946, now seen corresponding path program 1 times [2019-11-06 19:18:32,910 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:32,910 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602737795] [2019-11-06 19:18:32,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:32,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:33,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:33,358 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:18:33,359 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602737795] [2019-11-06 19:18:33,359 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310158635] [2019-11-06 19:18:33,359 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 19:18:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:33,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:18:33,531 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:33,687 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:18:33,688 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:18:33,688 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:18:33,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902097493] [2019-11-06 19:18:33,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:18:33,690 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:33,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:18:33,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:18:33,691 INFO L87 Difference]: Start difference. First operand 3113 states and 4592 transitions. Second operand 11 states. [2019-11-06 19:18:41,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:41,077 INFO L93 Difference]: Finished difference Result 8081 states and 12541 transitions. [2019-11-06 19:18:41,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 19:18:41,080 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 285 [2019-11-06 19:18:41,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:41,116 INFO L225 Difference]: With dead ends: 8081 [2019-11-06 19:18:41,117 INFO L226 Difference]: Without dead ends: 4974 [2019-11-06 19:18:41,126 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 294 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2019-11-06 19:18:41,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4974 states. [2019-11-06 19:18:41,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4974 to 4604. [2019-11-06 19:18:41,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4604 states. [2019-11-06 19:18:41,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4604 states to 4604 states and 6459 transitions. [2019-11-06 19:18:41,278 INFO L78 Accepts]: Start accepts. Automaton has 4604 states and 6459 transitions. Word has length 285 [2019-11-06 19:18:41,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:41,280 INFO L462 AbstractCegarLoop]: Abstraction has 4604 states and 6459 transitions. [2019-11-06 19:18:41,281 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:18:41,281 INFO L276 IsEmpty]: Start isEmpty. Operand 4604 states and 6459 transitions. [2019-11-06 19:18:41,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2019-11-06 19:18:41,296 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:41,296 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:18:41,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:41,500 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:41,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:41,501 INFO L82 PathProgramCache]: Analyzing trace with hash -932828961, now seen corresponding path program 1 times [2019-11-06 19:18:41,502 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:41,502 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493331560] [2019-11-06 19:18:41,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:41,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:41,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:42,081 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 68 proven. 130 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:18:42,081 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493331560] [2019-11-06 19:18:42,081 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749850421] [2019-11-06 19:18:42,082 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 19:18:42,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:42,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:18:42,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:42,404 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-06 19:18:42,405 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:18:42,405 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:18:42,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914035058] [2019-11-06 19:18:42,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:18:42,408 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:42,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:18:42,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:18:42,409 INFO L87 Difference]: Start difference. First operand 4604 states and 6459 transitions. Second operand 5 states. [2019-11-06 19:18:44,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:44,959 INFO L93 Difference]: Finished difference Result 10323 states and 14978 transitions. [2019-11-06 19:18:44,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 19:18:44,960 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 320 [2019-11-06 19:18:44,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:44,991 INFO L225 Difference]: With dead ends: 10323 [2019-11-06 19:18:44,991 INFO L226 Difference]: Without dead ends: 5725 [2019-11-06 19:18:45,011 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 320 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:18:45,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5725 states. [2019-11-06 19:18:45,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5725 to 5647. [2019-11-06 19:18:45,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5647 states. [2019-11-06 19:18:45,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5647 states to 5647 states and 7412 transitions. [2019-11-06 19:18:45,182 INFO L78 Accepts]: Start accepts. Automaton has 5647 states and 7412 transitions. Word has length 320 [2019-11-06 19:18:45,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:45,183 INFO L462 AbstractCegarLoop]: Abstraction has 5647 states and 7412 transitions. [2019-11-06 19:18:45,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:18:45,183 INFO L276 IsEmpty]: Start isEmpty. Operand 5647 states and 7412 transitions. [2019-11-06 19:18:45,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2019-11-06 19:18:45,192 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:45,193 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:18:45,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:45,453 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:45,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:45,454 INFO L82 PathProgramCache]: Analyzing trace with hash 77897170, now seen corresponding path program 1 times [2019-11-06 19:18:45,454 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:45,454 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200749275] [2019-11-06 19:18:45,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:45,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:45,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:45,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:46,145 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 156 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:18:46,145 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200749275] [2019-11-06 19:18:46,145 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614881114] [2019-11-06 19:18:46,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:46,269 INFO L256 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:18:46,273 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:46,445 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 157 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:18:46,446 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:18:46,446 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:18:46,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245769933] [2019-11-06 19:18:46,447 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:18:46,448 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:46,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:18:46,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:18:46,448 INFO L87 Difference]: Start difference. First operand 5647 states and 7412 transitions. Second operand 11 states. [2019-11-06 19:18:52,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:52,103 INFO L93 Difference]: Finished difference Result 13826 states and 18765 transitions. [2019-11-06 19:18:52,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:18:52,103 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 347 [2019-11-06 19:18:52,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:52,142 INFO L225 Difference]: With dead ends: 13826 [2019-11-06 19:18:52,143 INFO L226 Difference]: Without dead ends: 7782 [2019-11-06 19:18:52,168 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-11-06 19:18:52,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7782 states. [2019-11-06 19:18:52,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7782 to 5981. [2019-11-06 19:18:52,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5981 states. [2019-11-06 19:18:52,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5981 states to 5981 states and 6791 transitions. [2019-11-06 19:18:52,476 INFO L78 Accepts]: Start accepts. Automaton has 5981 states and 6791 transitions. Word has length 347 [2019-11-06 19:18:52,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:52,478 INFO L462 AbstractCegarLoop]: Abstraction has 5981 states and 6791 transitions. [2019-11-06 19:18:52,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:18:52,479 INFO L276 IsEmpty]: Start isEmpty. Operand 5981 states and 6791 transitions. [2019-11-06 19:18:52,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2019-11-06 19:18:52,506 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:52,507 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:18:52,718 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:52,718 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:52,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:52,719 INFO L82 PathProgramCache]: Analyzing trace with hash 598801126, now seen corresponding path program 1 times [2019-11-06 19:18:52,719 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:52,719 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174339454] [2019-11-06 19:18:52,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:52,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:52,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:53,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:53,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 102 proven. 12 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2019-11-06 19:18:53,322 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174339454] [2019-11-06 19:18:53,331 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069449378] [2019-11-06 19:18:53,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:53,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:53,609 INFO L256 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 19:18:53,627 INFO L279 TraceCheckSpWp]: Computing forward predicates...