/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/Problem14_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:14:19,109 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:14:19,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:14:19,130 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:14:19,130 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:14:19,132 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:14:19,134 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:14:19,147 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:14:19,149 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:14:19,150 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:14:19,153 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:14:19,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:14:19,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:14:19,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:14:19,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:14:19,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:14:19,158 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:14:19,159 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:14:19,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:14:19,162 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:14:19,164 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:14:19,165 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:14:19,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:14:19,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:14:19,168 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:14:19,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:14:19,176 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:14:19,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:14:19,178 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 19:14:19,192 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:14:19,192 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:14:19,193 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:14:19,193 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:14:19,194 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:14:19,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:14:19,194 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:14:19,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:14:19,194 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:14:19,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:14:19,195 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:14:19,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:14:19,195 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:14:19,195 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:14:19,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:14:19,196 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:14:19,196 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:14:19,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:14:19,196 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:14:19,196 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:14:19,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:14:19,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:14:19,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:14:19,197 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:14:19,198 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:14:19,198 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:14:19,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:14:19,198 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:14:19,198 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:14:19,470 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:14:19,495 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:14:19,499 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:14:19,500 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:14:19,501 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:14:19,502 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label44.c [2019-11-06 19:14:19,578 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d06f9fe1/d0a677d86153475f827cf53c1ed7a2b1/FLAGd54d063d7 [2019-11-06 19:14:20,150 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:14:20,151 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label44.c [2019-11-06 19:14:20,174 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d06f9fe1/d0a677d86153475f827cf53c1ed7a2b1/FLAGd54d063d7 [2019-11-06 19:14:20,434 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d06f9fe1/d0a677d86153475f827cf53c1ed7a2b1 [2019-11-06 19:14:20,444 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:14:20,446 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:14:20,447 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:14:20,448 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:14:20,451 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:14:20,453 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:14:20" (1/1) ... [2019-11-06 19:14:20,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43f4232d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:20, skipping insertion in model container [2019-11-06 19:14:20,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:14:20" (1/1) ... [2019-11-06 19:14:20,465 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:14:20,531 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:14:21,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:14:21,123 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:14:21,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:14:21,399 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:14:21,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:21 WrapperNode [2019-11-06 19:14:21,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:14:21,401 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:14:21,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:14:21,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:14:21,424 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:21" (1/1) ... [2019-11-06 19:14:21,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:21" (1/1) ... [2019-11-06 19:14:21,466 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:21" (1/1) ... [2019-11-06 19:14:21,467 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:21" (1/1) ... [2019-11-06 19:14:21,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:21" (1/1) ... [2019-11-06 19:14:21,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:21" (1/1) ... [2019-11-06 19:14:21,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:21" (1/1) ... [2019-11-06 19:14:21,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:14:21,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:14:21,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:14:21,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:14:21,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:21" (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 19:14:21,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:14:21,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:14:21,689 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:14:21,689 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:14:21,690 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:14:21,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:14:21,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:14:21,691 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:14:21,692 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:14:21,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:14:21,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:14:23,323 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:14:23,325 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:14:23,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:14:23 BoogieIcfgContainer [2019-11-06 19:14:23,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:14:23,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:14:23,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:14:23,331 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:14:23,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:14:20" (1/3) ... [2019-11-06 19:14:23,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65f78159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:14:23, skipping insertion in model container [2019-11-06 19:14:23,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:21" (2/3) ... [2019-11-06 19:14:23,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65f78159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:14:23, skipping insertion in model container [2019-11-06 19:14:23,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:14:23" (3/3) ... [2019-11-06 19:14:23,335 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label44.c [2019-11-06 19:14:23,345 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:14:23,354 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:14:23,366 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:14:23,395 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:14:23,395 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:14:23,396 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:14:23,396 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:14:23,396 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:14:23,396 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:14:23,396 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:14:23,397 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:14:23,422 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-11-06 19:14:23,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 19:14:23,428 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:23,429 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:23,431 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:23,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:23,437 INFO L82 PathProgramCache]: Analyzing trace with hash -989093190, now seen corresponding path program 1 times [2019-11-06 19:14:23,447 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:23,447 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811044654] [2019-11-06 19:14:23,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:23,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:23,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:23,767 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 19:14:23,767 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811044654] [2019-11-06 19:14:23,768 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:14:23,769 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:14:23,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052629825] [2019-11-06 19:14:23,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:14:23,777 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:23,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:14:23,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:14:23,796 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-11-06 19:14:26,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:26,581 INFO L93 Difference]: Finished difference Result 902 states and 1625 transitions. [2019-11-06 19:14:26,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:14:26,583 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-11-06 19:14:26,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:26,602 INFO L225 Difference]: With dead ends: 902 [2019-11-06 19:14:26,602 INFO L226 Difference]: Without dead ends: 564 [2019-11-06 19:14:26,611 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:26,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-11-06 19:14:26,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 376. [2019-11-06 19:14:26,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2019-11-06 19:14:26,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 528 transitions. [2019-11-06 19:14:26,691 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 528 transitions. Word has length 17 [2019-11-06 19:14:26,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:26,692 INFO L462 AbstractCegarLoop]: Abstraction has 376 states and 528 transitions. [2019-11-06 19:14:26,692 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:14:26,692 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 528 transitions. [2019-11-06 19:14:26,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-06 19:14:26,697 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:26,697 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 19:14:26,698 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:26,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:26,698 INFO L82 PathProgramCache]: Analyzing trace with hash 649942285, now seen corresponding path program 1 times [2019-11-06 19:14:26,698 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:26,699 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926103665] [2019-11-06 19:14:26,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:26,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:14:26,967 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926103665] [2019-11-06 19:14:26,967 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531557332] [2019-11-06 19:14:26,967 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 19:14:27,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:27,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:14:27,058 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:27,136 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:14:27,137 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:27,137 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:14:27,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221963107] [2019-11-06 19:14:27,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:14:27,144 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:27,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:14:27,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:27,146 INFO L87 Difference]: Start difference. First operand 376 states and 528 transitions. Second operand 3 states. [2019-11-06 19:14:28,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:28,130 INFO L93 Difference]: Finished difference Result 1114 states and 1581 transitions. [2019-11-06 19:14:28,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:14:28,133 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2019-11-06 19:14:28,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:28,139 INFO L225 Difference]: With dead ends: 1114 [2019-11-06 19:14:28,140 INFO L226 Difference]: Without dead ends: 744 [2019-11-06 19:14:28,142 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:28,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2019-11-06 19:14:28,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2019-11-06 19:14:28,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2019-11-06 19:14:28,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 976 transitions. [2019-11-06 19:14:28,186 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 976 transitions. Word has length 100 [2019-11-06 19:14:28,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:28,187 INFO L462 AbstractCegarLoop]: Abstraction has 744 states and 976 transitions. [2019-11-06 19:14:28,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:14:28,188 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 976 transitions. [2019-11-06 19:14:28,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-06 19:14:28,192 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:28,192 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 19:14:28,396 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:28,396 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:28,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:28,397 INFO L82 PathProgramCache]: Analyzing trace with hash 2036174565, now seen corresponding path program 1 times [2019-11-06 19:14:28,398 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:28,398 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798234376] [2019-11-06 19:14:28,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:28,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:14:28,874 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798234376] [2019-11-06 19:14:28,874 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:14:28,875 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-06 19:14:28,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967891052] [2019-11-06 19:14:28,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 19:14:28,881 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:28,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 19:14:28,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-06 19:14:28,883 INFO L87 Difference]: Start difference. First operand 744 states and 976 transitions. Second operand 10 states. [2019-11-06 19:14:31,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:31,653 INFO L93 Difference]: Finished difference Result 2058 states and 2654 transitions. [2019-11-06 19:14:31,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 19:14:31,654 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 112 [2019-11-06 19:14:31,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:31,662 INFO L225 Difference]: With dead ends: 2058 [2019-11-06 19:14:31,662 INFO L226 Difference]: Without dead ends: 1320 [2019-11-06 19:14:31,665 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:14:31,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2019-11-06 19:14:31,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1122. [2019-11-06 19:14:31,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1122 states. [2019-11-06 19:14:31,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1418 transitions. [2019-11-06 19:14:31,711 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1418 transitions. Word has length 112 [2019-11-06 19:14:31,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:31,712 INFO L462 AbstractCegarLoop]: Abstraction has 1122 states and 1418 transitions. [2019-11-06 19:14:31,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 19:14:31,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1418 transitions. [2019-11-06 19:14:31,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-06 19:14:31,717 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:31,717 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 19:14:31,718 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:31,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:31,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1995624033, now seen corresponding path program 1 times [2019-11-06 19:14:31,718 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:31,719 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733046194] [2019-11-06 19:14:31,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:31,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:31,943 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 19:14:31,944 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733046194] [2019-11-06 19:14:31,944 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084878309] [2019-11-06 19:14:31,944 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 19:14:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:32,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:14:32,019 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:32,046 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:14:32,046 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:32,047 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:14:32,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153136599] [2019-11-06 19:14:32,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:14:32,050 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:32,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:14:32,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:32,051 INFO L87 Difference]: Start difference. First operand 1122 states and 1418 transitions. Second operand 3 states. [2019-11-06 19:14:32,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:32,870 INFO L93 Difference]: Finished difference Result 1676 states and 2187 transitions. [2019-11-06 19:14:32,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:14:32,877 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 126 [2019-11-06 19:14:32,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:32,888 INFO L225 Difference]: With dead ends: 1676 [2019-11-06 19:14:32,888 INFO L226 Difference]: Without dead ends: 1674 [2019-11-06 19:14:32,890 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 126 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:32,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2019-11-06 19:14:32,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1308. [2019-11-06 19:14:32,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1308 states. [2019-11-06 19:14:32,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 1736 transitions. [2019-11-06 19:14:32,941 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 1736 transitions. Word has length 126 [2019-11-06 19:14:32,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:32,942 INFO L462 AbstractCegarLoop]: Abstraction has 1308 states and 1736 transitions. [2019-11-06 19:14:32,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:14:32,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 1736 transitions. [2019-11-06 19:14:32,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-11-06 19:14:32,945 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:32,945 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:14:33,153 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:33,154 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:33,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:33,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1918057, now seen corresponding path program 1 times [2019-11-06 19:14:33,155 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:33,156 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930153238] [2019-11-06 19:14:33,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:33,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:33,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:33,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:33,492 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:14:33,492 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930153238] [2019-11-06 19:14:33,493 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443675821] [2019-11-06 19:14:33,493 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 19:14:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:33,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:14:33,605 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:33,671 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-06 19:14:33,671 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:33,671 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2019-11-06 19:14:33,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844994037] [2019-11-06 19:14:33,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:14:33,672 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:33,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:14:33,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-06 19:14:33,673 INFO L87 Difference]: Start difference. First operand 1308 states and 1736 transitions. Second operand 5 states. [2019-11-06 19:14:35,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:35,032 INFO L93 Difference]: Finished difference Result 3396 states and 4755 transitions. [2019-11-06 19:14:35,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:14:35,033 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 182 [2019-11-06 19:14:35,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:35,055 INFO L225 Difference]: With dead ends: 3396 [2019-11-06 19:14:35,055 INFO L226 Difference]: Without dead ends: 2094 [2019-11-06 19:14:35,060 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:14:35,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2019-11-06 19:14:35,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 2062. [2019-11-06 19:14:35,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2062 states. [2019-11-06 19:14:35,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 2698 transitions. [2019-11-06 19:14:35,182 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 2698 transitions. Word has length 182 [2019-11-06 19:14:35,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:35,183 INFO L462 AbstractCegarLoop]: Abstraction has 2062 states and 2698 transitions. [2019-11-06 19:14:35,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:14:35,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 2698 transitions. [2019-11-06 19:14:35,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-11-06 19:14:35,193 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:35,193 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:14:35,407 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:35,407 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:35,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:35,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1202443494, now seen corresponding path program 1 times [2019-11-06 19:14:35,418 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:35,418 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754261166] [2019-11-06 19:14:35,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:35,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:35,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:35,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:36,259 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 90 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:14:36,259 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754261166] [2019-11-06 19:14:36,260 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274616203] [2019-11-06 19:14:36,260 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 19:14:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:36,332 INFO L256 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:14:36,336 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:36,399 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:14:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-06 19:14:36,477 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:36,477 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 16 [2019-11-06 19:14:36,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363891642] [2019-11-06 19:14:36,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:14:36,478 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:36,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:14:36,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:14:36,479 INFO L87 Difference]: Start difference. First operand 2062 states and 2698 transitions. Second operand 5 states. [2019-11-06 19:14:37,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:37,898 INFO L93 Difference]: Finished difference Result 4868 states and 6267 transitions. [2019-11-06 19:14:37,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:14:37,902 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 185 [2019-11-06 19:14:37,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:37,916 INFO L225 Difference]: With dead ends: 4868 [2019-11-06 19:14:37,916 INFO L226 Difference]: Without dead ends: 2812 [2019-11-06 19:14:37,922 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2019-11-06 19:14:37,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2812 states. [2019-11-06 19:14:37,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2812 to 2434. [2019-11-06 19:14:37,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2434 states. [2019-11-06 19:14:37,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2434 states to 2434 states and 3115 transitions. [2019-11-06 19:14:37,990 INFO L78 Accepts]: Start accepts. Automaton has 2434 states and 3115 transitions. Word has length 185 [2019-11-06 19:14:37,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:37,990 INFO L462 AbstractCegarLoop]: Abstraction has 2434 states and 3115 transitions. [2019-11-06 19:14:37,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:14:37,990 INFO L276 IsEmpty]: Start isEmpty. Operand 2434 states and 3115 transitions. [2019-11-06 19:14:37,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-11-06 19:14:37,993 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:37,993 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:38,196 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:38,197 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:38,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:38,198 INFO L82 PathProgramCache]: Analyzing trace with hash -438667603, now seen corresponding path program 1 times [2019-11-06 19:14:38,198 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:38,198 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487393467] [2019-11-06 19:14:38,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:38,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:38,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:14:39,014 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487393467] [2019-11-06 19:14:39,015 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552742700] [2019-11-06 19:14:39,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:39,094 INFO L256 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 19:14:39,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:39,157 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:14:39,250 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 51 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:14:39,251 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:14:39,251 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2019-11-06 19:14:39,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020303909] [2019-11-06 19:14:39,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 19:14:39,252 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:39,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 19:14:39,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:14:39,253 INFO L87 Difference]: Start difference. First operand 2434 states and 3115 transitions. Second operand 16 states. [2019-11-06 19:14:42,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:42,243 INFO L93 Difference]: Finished difference Result 5358 states and 6839 transitions. [2019-11-06 19:14:42,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 19:14:42,244 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 196 [2019-11-06 19:14:42,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:42,256 INFO L225 Difference]: With dead ends: 5358 [2019-11-06 19:14:42,257 INFO L226 Difference]: Without dead ends: 2883 [2019-11-06 19:14:42,265 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=210, Invalid=660, Unknown=0, NotChecked=0, Total=870 [2019-11-06 19:14:42,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2019-11-06 19:14:42,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 2802. [2019-11-06 19:14:42,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2802 states. [2019-11-06 19:14:42,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 3301 transitions. [2019-11-06 19:14:42,348 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 3301 transitions. Word has length 196 [2019-11-06 19:14:42,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:42,349 INFO L462 AbstractCegarLoop]: Abstraction has 2802 states and 3301 transitions. [2019-11-06 19:14:42,349 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 19:14:42,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 3301 transitions. [2019-11-06 19:14:42,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-11-06 19:14:42,352 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:42,352 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:14:42,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:42,563 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:42,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:42,564 INFO L82 PathProgramCache]: Analyzing trace with hash 629311762, now seen corresponding path program 1 times [2019-11-06 19:14:42,564 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:42,564 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126758548] [2019-11-06 19:14:42,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:42,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:42,767 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:14:42,767 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126758548] [2019-11-06 19:14:42,769 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592425092] [2019-11-06 19:14:42,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:42,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:42,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:14:42,865 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:42,914 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:14:42,915 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:42,915 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:14:42,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418011965] [2019-11-06 19:14:42,916 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:14:42,916 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:42,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:14:42,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:42,921 INFO L87 Difference]: Start difference. First operand 2802 states and 3301 transitions. Second operand 3 states. [2019-11-06 19:14:43,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:43,534 INFO L93 Difference]: Finished difference Result 6336 states and 7506 transitions. [2019-11-06 19:14:43,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:14:43,534 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 199 [2019-11-06 19:14:43,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:43,548 INFO L225 Difference]: With dead ends: 6336 [2019-11-06 19:14:43,548 INFO L226 Difference]: Without dead ends: 3356 [2019-11-06 19:14:43,556 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 204 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 19:14:43,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2019-11-06 19:14:43,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 2618. [2019-11-06 19:14:43,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2618 states. [2019-11-06 19:14:43,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2618 states to 2618 states and 3077 transitions. [2019-11-06 19:14:43,627 INFO L78 Accepts]: Start accepts. Automaton has 2618 states and 3077 transitions. Word has length 199 [2019-11-06 19:14:43,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:43,628 INFO L462 AbstractCegarLoop]: Abstraction has 2618 states and 3077 transitions. [2019-11-06 19:14:43,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:14:43,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2618 states and 3077 transitions. [2019-11-06 19:14:43,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2019-11-06 19:14:43,631 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:43,631 INFO L410 BasicCegarLoop]: trace histogram [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, 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 19:14:43,836 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:43,836 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:43,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:43,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1137862238, now seen corresponding path program 1 times [2019-11-06 19:14:43,837 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:43,837 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132353156] [2019-11-06 19:14:43,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:43,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:43,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:44,922 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:14:44,923 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132353156] [2019-11-06 19:14:44,923 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240025065] [2019-11-06 19:14:44,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:45,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:45,025 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:14:45,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:45,067 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:14:45,124 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-06 19:14:45,125 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:45,125 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [18] total 21 [2019-11-06 19:14:45,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442750715] [2019-11-06 19:14:45,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:14:45,129 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:45,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:14:45,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2019-11-06 19:14:45,129 INFO L87 Difference]: Start difference. First operand 2618 states and 3077 transitions. Second operand 5 states. [2019-11-06 19:14:46,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:46,224 INFO L93 Difference]: Finished difference Result 5440 states and 6574 transitions. [2019-11-06 19:14:46,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:14:46,229 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 221 [2019-11-06 19:14:46,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:46,241 INFO L225 Difference]: With dead ends: 5440 [2019-11-06 19:14:46,241 INFO L226 Difference]: Without dead ends: 3194 [2019-11-06 19:14:46,246 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 221 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2019-11-06 19:14:46,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3194 states. [2019-11-06 19:14:46,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3194 to 3008. [2019-11-06 19:14:46,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3008 states. [2019-11-06 19:14:46,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 3552 transitions. [2019-11-06 19:14:46,311 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 3552 transitions. Word has length 221 [2019-11-06 19:14:46,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:46,311 INFO L462 AbstractCegarLoop]: Abstraction has 3008 states and 3552 transitions. [2019-11-06 19:14:46,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:14:46,312 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 3552 transitions. [2019-11-06 19:14:46,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2019-11-06 19:14:46,316 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:46,317 INFO L410 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 19:14:46,521 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:46,521 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:46,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:46,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1035337430, now seen corresponding path program 1 times [2019-11-06 19:14:46,524 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:46,524 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152035584] [2019-11-06 19:14:46,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:46,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:46,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:46,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:46,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:47,307 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 134 proven. 100 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-11-06 19:14:47,308 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152035584] [2019-11-06 19:14:47,308 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568814362] [2019-11-06 19:14:47,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:47,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:47,420 INFO L256 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:14:47,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:47,550 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 221 proven. 2 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-11-06 19:14:47,550 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:14:47,551 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2019-11-06 19:14:47,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769709414] [2019-11-06 19:14:47,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 19:14:47,552 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:47,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 19:14:47,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:14:47,553 INFO L87 Difference]: Start difference. First operand 3008 states and 3552 transitions. Second operand 13 states. [2019-11-06 19:14:51,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:51,713 INFO L93 Difference]: Finished difference Result 5858 states and 7044 transitions. [2019-11-06 19:14:51,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-06 19:14:51,713 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 331 [2019-11-06 19:14:51,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:51,726 INFO L225 Difference]: With dead ends: 5858 [2019-11-06 19:14:51,726 INFO L226 Difference]: Without dead ends: 3038 [2019-11-06 19:14:51,734 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 358 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=306, Invalid=1176, Unknown=0, NotChecked=0, Total=1482 [2019-11-06 19:14:51,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3038 states. [2019-11-06 19:14:51,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3038 to 3014. [2019-11-06 19:14:51,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3014 states. [2019-11-06 19:14:51,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3014 states to 3014 states and 3465 transitions. [2019-11-06 19:14:51,796 INFO L78 Accepts]: Start accepts. Automaton has 3014 states and 3465 transitions. Word has length 331 [2019-11-06 19:14:51,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:51,797 INFO L462 AbstractCegarLoop]: Abstraction has 3014 states and 3465 transitions. [2019-11-06 19:14:51,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 19:14:51,797 INFO L276 IsEmpty]: Start isEmpty. Operand 3014 states and 3465 transitions. [2019-11-06 19:14:51,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2019-11-06 19:14:51,805 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:51,805 INFO L410 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 19:14:52,011 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:52,012 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:52,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:52,012 INFO L82 PathProgramCache]: Analyzing trace with hash -854069146, now seen corresponding path program 1 times [2019-11-06 19:14:52,012 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:52,013 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460943229] [2019-11-06 19:14:52,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:52,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:52,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:52,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:52,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2019-11-06 19:14:52,409 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460943229] [2019-11-06 19:14:52,410 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217846577] [2019-11-06 19:14:52,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:52,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:52,542 INFO L256 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:14:52,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:52,652 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-06 19:14:52,653 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:52,653 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 19:14:52,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905508269] [2019-11-06 19:14:52,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:14:52,655 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:52,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:14:52,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:14:52,656 INFO L87 Difference]: Start difference. First operand 3014 states and 3465 transitions. Second operand 3 states. [2019-11-06 19:14:53,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:53,302 INFO L93 Difference]: Finished difference Result 3744 states and 4308 transitions. [2019-11-06 19:14:53,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:14:53,303 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 409 [2019-11-06 19:14:53,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:53,314 INFO L225 Difference]: With dead ends: 3744 [2019-11-06 19:14:53,314 INFO L226 Difference]: Without dead ends: 3742 [2019-11-06 19:14:53,316 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:14:53,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3742 states. [2019-11-06 19:14:53,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3742 to 3196. [2019-11-06 19:14:53,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3196 states. [2019-11-06 19:14:53,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3196 states to 3196 states and 3673 transitions. [2019-11-06 19:14:53,383 INFO L78 Accepts]: Start accepts. Automaton has 3196 states and 3673 transitions. Word has length 409 [2019-11-06 19:14:53,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:53,384 INFO L462 AbstractCegarLoop]: Abstraction has 3196 states and 3673 transitions. [2019-11-06 19:14:53,384 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:14:53,384 INFO L276 IsEmpty]: Start isEmpty. Operand 3196 states and 3673 transitions. [2019-11-06 19:14:53,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2019-11-06 19:14:53,392 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:53,392 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:53,596 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:53,596 INFO L410 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:53,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:53,597 INFO L82 PathProgramCache]: Analyzing trace with hash -62690190, now seen corresponding path program 1 times [2019-11-06 19:14:53,597 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:53,597 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315491072] [2019-11-06 19:14:53,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:53,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:53,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:53,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:53,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 317 proven. 6 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2019-11-06 19:14:54,550 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315491072] [2019-11-06 19:14:54,550 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318973123] [2019-11-06 19:14:54,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:54,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 19:14:54,688 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:54,724 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:14:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 318 proven. 2 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2019-11-06 19:14:54,934 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:14:54,934 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-11-06 19:14:54,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78152674] [2019-11-06 19:14:54,936 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 19:14:54,936 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:54,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 19:14:54,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:14:54,937 INFO L87 Difference]: Start difference. First operand 3196 states and 3673 transitions. Second operand 12 states.