/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_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:13:16,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:13:16,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:13:16,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:13:16,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:13:16,066 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:13:16,067 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:13:16,068 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:13:16,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:13:16,070 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:13:16,072 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:13:16,074 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:13:16,076 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:13:16,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:13:16,078 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:13:16,079 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:13:16,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:13:16,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:13:16,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:13:16,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:13:16,101 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 19:13:16,124 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:13:16,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:13:16,126 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:13:16,127 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:13:16,127 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:13:16,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:13:16,127 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:13:16,128 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:13:16,128 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:13:16,128 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:13:16,129 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:13:16,130 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:13:16,130 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:13:16,130 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:13:16,130 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:13:16,131 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:13:16,131 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:13:16,131 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:13:16,131 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:13:16,131 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:13:16,132 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:13:16,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:13:16,132 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:13:16,132 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:13:16,133 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:13:16,133 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:13:16,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:13:16,133 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:13:16,133 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:13:16,415 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:13:16,428 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:13:16,431 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:13:16,433 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:13:16,433 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:13:16,434 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label23.c [2019-11-06 19:13:16,495 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c906c33b9/b4c10e6e6a0e47bf869d569b14191d22/FLAGf6dee9c5d [2019-11-06 19:13:17,087 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:13:17,088 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label23.c [2019-11-06 19:13:17,103 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c906c33b9/b4c10e6e6a0e47bf869d569b14191d22/FLAGf6dee9c5d [2019-11-06 19:13:17,334 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c906c33b9/b4c10e6e6a0e47bf869d569b14191d22 [2019-11-06 19:13:17,345 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:13:17,346 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:13:17,348 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:13:17,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:13:17,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:13:17,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:13:17" (1/1) ... [2019-11-06 19:13:17,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c304c45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:17, skipping insertion in model container [2019-11-06 19:13:17,356 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:13:17" (1/1) ... [2019-11-06 19:13:17,364 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:13:17,422 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:13:18,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:13:18,035 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:13:18,175 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:13:18,193 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:13:18,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:18 WrapperNode [2019-11-06 19:13:18,195 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:13:18,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:13:18,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:13:18,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:13:18,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:18" (1/1) ... [2019-11-06 19:13:18,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:18" (1/1) ... [2019-11-06 19:13:18,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:18" (1/1) ... [2019-11-06 19:13:18,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:18" (1/1) ... [2019-11-06 19:13:18,287 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:18" (1/1) ... [2019-11-06 19:13:18,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:18" (1/1) ... [2019-11-06 19:13:18,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:18" (1/1) ... [2019-11-06 19:13:18,333 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:13:18,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:13:18,334 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:13:18,334 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:13:18,336 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:18" (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 19:13:18,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:13:18,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:13:18,409 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:13:18,410 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:13:18,410 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:13:18,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:13:18,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:13:18,410 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:13:18,411 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:13:18,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:13:18,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:13:19,834 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:13:19,835 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:13:19,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:13:19 BoogieIcfgContainer [2019-11-06 19:13:19,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:13:19,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:13:19,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:13:19,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:13:19,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:13:17" (1/3) ... [2019-11-06 19:13:19,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@665490a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:13:19, skipping insertion in model container [2019-11-06 19:13:19,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:18" (2/3) ... [2019-11-06 19:13:19,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@665490a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:13:19, skipping insertion in model container [2019-11-06 19:13:19,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:13:19" (3/3) ... [2019-11-06 19:13:19,846 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label23.c [2019-11-06 19:13:19,858 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:13:19,867 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:13:19,881 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:13:19,910 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:13:19,910 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:13:19,910 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:13:19,911 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:13:19,911 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:13:19,911 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:13:19,911 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:13:19,911 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:13:19,936 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-11-06 19:13:19,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-06 19:13:19,944 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:19,945 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] [2019-11-06 19:13:19,947 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:19,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:19,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1582887541, now seen corresponding path program 1 times [2019-11-06 19:13:19,963 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:19,963 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879617636] [2019-11-06 19:13:19,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:20,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:20,349 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 19:13:20,350 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879617636] [2019-11-06 19:13:20,351 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:13:20,351 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:13:20,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571622593] [2019-11-06 19:13:20,358 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:13:20,358 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:20,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:13:20,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:13:20,376 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-11-06 19:13:22,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:22,968 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2019-11-06 19:13:22,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:13:22,972 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2019-11-06 19:13:22,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:23,012 INFO L225 Difference]: With dead ends: 886 [2019-11-06 19:13:23,013 INFO L226 Difference]: Without dead ends: 564 [2019-11-06 19:13:23,026 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 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 19:13:23,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-11-06 19:13:23,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2019-11-06 19:13:23,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-11-06 19:13:23,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2019-11-06 19:13:23,165 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 38 [2019-11-06 19:13:23,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:23,165 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2019-11-06 19:13:23,165 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:13:23,166 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2019-11-06 19:13:23,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-06 19:13:23,171 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:23,173 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:13:23,173 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:23,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:23,174 INFO L82 PathProgramCache]: Analyzing trace with hash 980020742, now seen corresponding path program 1 times [2019-11-06 19:13:23,174 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:23,174 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21202858] [2019-11-06 19:13:23,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:23,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:23,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:23,411 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:13:23,412 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21202858] [2019-11-06 19:13:23,412 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:13:23,412 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:13:23,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963729407] [2019-11-06 19:13:23,416 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:13:23,416 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:23,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:13:23,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:13:23,417 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 9 states. [2019-11-06 19:13:25,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:25,405 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2019-11-06 19:13:25,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:13:25,406 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 112 [2019-11-06 19:13:25,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:25,413 INFO L225 Difference]: With dead ends: 1320 [2019-11-06 19:13:25,413 INFO L226 Difference]: Without dead ends: 768 [2019-11-06 19:13:25,416 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:13:25,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2019-11-06 19:13:25,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2019-11-06 19:13:25,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2019-11-06 19:13:25,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2019-11-06 19:13:25,444 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 112 [2019-11-06 19:13:25,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:25,445 INFO L462 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2019-11-06 19:13:25,445 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:13:25,445 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2019-11-06 19:13:25,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-06 19:13:25,450 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:25,450 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:13:25,450 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:25,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:25,451 INFO L82 PathProgramCache]: Analyzing trace with hash -111529671, now seen corresponding path program 1 times [2019-11-06 19:13:25,451 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:25,451 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498024753] [2019-11-06 19:13:25,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:25,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:25,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:25,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:25,625 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:13:25,626 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498024753] [2019-11-06 19:13:25,626 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503836137] [2019-11-06 19:13:25,626 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 19:13:25,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:25,728 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:13:25,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:25,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:13:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:13:25,937 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:13:25,937 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2019-11-06 19:13:25,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163984312] [2019-11-06 19:13:25,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:13:25,943 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:25,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:13:25,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:13:25,944 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand 5 states. [2019-11-06 19:13:27,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:27,433 INFO L93 Difference]: Finished difference Result 1338 states and 1927 transitions. [2019-11-06 19:13:27,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:13:27,435 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2019-11-06 19:13:27,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:27,440 INFO L225 Difference]: With dead ends: 1338 [2019-11-06 19:13:27,441 INFO L226 Difference]: Without dead ends: 778 [2019-11-06 19:13:27,442 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:13:27,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2019-11-06 19:13:27,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 754. [2019-11-06 19:13:27,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 754 states. [2019-11-06 19:13:27,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1023 transitions. [2019-11-06 19:13:27,488 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1023 transitions. Word has length 121 [2019-11-06 19:13:27,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:27,490 INFO L462 AbstractCegarLoop]: Abstraction has 754 states and 1023 transitions. [2019-11-06 19:13:27,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:13:27,490 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1023 transitions. [2019-11-06 19:13:27,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2019-11-06 19:13:27,497 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:27,498 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:13:27,701 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:27,701 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:27,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:27,702 INFO L82 PathProgramCache]: Analyzing trace with hash 494910482, now seen corresponding path program 1 times [2019-11-06 19:13:27,702 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:27,702 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244059601] [2019-11-06 19:13:27,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:27,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:28,450 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 68 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:13:28,450 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244059601] [2019-11-06 19:13:28,451 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243339316] [2019-11-06 19:13:28,451 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 19:13:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:28,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 19:13:28,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:28,640 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:13:28,748 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 93 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:13:28,749 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:13:28,749 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2019-11-06 19:13:28,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043223194] [2019-11-06 19:13:28,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 19:13:28,751 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:28,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 19:13:28,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:13:28,752 INFO L87 Difference]: Start difference. First operand 754 states and 1023 transitions. Second operand 16 states. [2019-11-06 19:13:32,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:32,742 INFO L93 Difference]: Finished difference Result 1813 states and 2474 transitions. [2019-11-06 19:13:32,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 19:13:32,743 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 205 [2019-11-06 19:13:32,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:32,749 INFO L225 Difference]: With dead ends: 1813 [2019-11-06 19:13:32,749 INFO L226 Difference]: Without dead ends: 1018 [2019-11-06 19:13:32,752 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=266, Invalid=924, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 19:13:32,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2019-11-06 19:13:32,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 942. [2019-11-06 19:13:32,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 942 states. [2019-11-06 19:13:32,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1122 transitions. [2019-11-06 19:13:32,785 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1122 transitions. Word has length 205 [2019-11-06 19:13:32,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:32,786 INFO L462 AbstractCegarLoop]: Abstraction has 942 states and 1122 transitions. [2019-11-06 19:13:32,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 19:13:32,786 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1122 transitions. [2019-11-06 19:13:32,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-11-06 19:13:32,789 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:32,789 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:13:32,992 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:32,993 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:32,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:32,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1312430241, now seen corresponding path program 1 times [2019-11-06 19:13:32,994 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:32,994 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657042425] [2019-11-06 19:13:32,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:33,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:33,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:33,535 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 109 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:13:33,535 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657042425] [2019-11-06 19:13:33,536 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835392151] [2019-11-06 19:13:33,536 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 19:13:33,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:33,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:13:33,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:33,706 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:13:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-06 19:13:33,780 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:13:33,781 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2019-11-06 19:13:33,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435605726] [2019-11-06 19:13:33,781 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:13:33,782 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:33,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:13:33,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:13:33,782 INFO L87 Difference]: Start difference. First operand 942 states and 1122 transitions. Second operand 5 states. [2019-11-06 19:13:34,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:34,907 INFO L93 Difference]: Finished difference Result 2830 states and 3431 transitions. [2019-11-06 19:13:34,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:13:34,907 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 230 [2019-11-06 19:13:34,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:34,918 INFO L225 Difference]: With dead ends: 2830 [2019-11-06 19:13:34,918 INFO L226 Difference]: Without dead ends: 1894 [2019-11-06 19:13:34,921 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:13:34,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2019-11-06 19:13:34,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1694. [2019-11-06 19:13:34,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1694 states. [2019-11-06 19:13:34,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 1996 transitions. [2019-11-06 19:13:34,981 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 1996 transitions. Word has length 230 [2019-11-06 19:13:34,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:34,982 INFO L462 AbstractCegarLoop]: Abstraction has 1694 states and 1996 transitions. [2019-11-06 19:13:34,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:13:34,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 1996 transitions. [2019-11-06 19:13:34,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2019-11-06 19:13:34,987 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:34,989 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, 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, 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 19:13:35,197 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:35,197 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:35,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:35,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1880402258, now seen corresponding path program 1 times [2019-11-06 19:13:35,198 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:35,198 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034225879] [2019-11-06 19:13:35,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:35,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:35,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:35,781 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 258 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-11-06 19:13:35,781 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034225879] [2019-11-06 19:13:35,789 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115746275] [2019-11-06 19:13:35,790 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 19:13:35,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:35,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:13:35,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 260 proven. 2 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-11-06 19:13:36,054 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:13:36,054 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-11-06 19:13:36,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881294907] [2019-11-06 19:13:36,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:13:36,056 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:36,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:13:36,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:13:36,056 INFO L87 Difference]: Start difference. First operand 1694 states and 1996 transitions. Second operand 9 states. [2019-11-06 19:13:38,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:38,517 INFO L93 Difference]: Finished difference Result 4328 states and 5278 transitions. [2019-11-06 19:13:38,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:13:38,518 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 340 [2019-11-06 19:13:38,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:38,530 INFO L225 Difference]: With dead ends: 4328 [2019-11-06 19:13:38,530 INFO L226 Difference]: Without dead ends: 2822 [2019-11-06 19:13:38,534 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 351 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2019-11-06 19:13:38,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2822 states. [2019-11-06 19:13:38,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2822 to 2450. [2019-11-06 19:13:38,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2450 states. [2019-11-06 19:13:38,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2450 states to 2450 states and 2939 transitions. [2019-11-06 19:13:38,598 INFO L78 Accepts]: Start accepts. Automaton has 2450 states and 2939 transitions. Word has length 340 [2019-11-06 19:13:38,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:38,599 INFO L462 AbstractCegarLoop]: Abstraction has 2450 states and 2939 transitions. [2019-11-06 19:13:38,599 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:13:38,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2450 states and 2939 transitions. [2019-11-06 19:13:38,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2019-11-06 19:13:38,607 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:38,607 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:13:38,811 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:38,812 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:38,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:38,812 INFO L82 PathProgramCache]: Analyzing trace with hash -324737621, now seen corresponding path program 1 times [2019-11-06 19:13:38,812 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:38,812 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510860859] [2019-11-06 19:13:38,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:38,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:39,696 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 376 proven. 6 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2019-11-06 19:13:39,696 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510860859] [2019-11-06 19:13:39,696 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438126604] [2019-11-06 19:13:39,696 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 19:13:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:39,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 19:13:39,832 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:39,868 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:13:40,084 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 377 proven. 2 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2019-11-06 19:13:40,084 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:13:40,084 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-11-06 19:13:40,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171789763] [2019-11-06 19:13:40,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 19:13:40,086 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:40,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 19:13:40,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:13:40,086 INFO L87 Difference]: Start difference. First operand 2450 states and 2939 transitions. Second operand 12 states. [2019-11-06 19:13:42,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:42,351 INFO L93 Difference]: Finished difference Result 5010 states and 6057 transitions. [2019-11-06 19:13:42,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:13:42,352 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 424 [2019-11-06 19:13:42,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:42,365 INFO L225 Difference]: With dead ends: 5010 [2019-11-06 19:13:42,365 INFO L226 Difference]: Without dead ends: 2709 [2019-11-06 19:13:42,371 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 441 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-11-06 19:13:42,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2709 states. [2019-11-06 19:13:42,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2709 to 2448. [2019-11-06 19:13:42,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2448 states. [2019-11-06 19:13:42,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 2823 transitions. [2019-11-06 19:13:42,434 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 2823 transitions. Word has length 424 [2019-11-06 19:13:42,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:42,434 INFO L462 AbstractCegarLoop]: Abstraction has 2448 states and 2823 transitions. [2019-11-06 19:13:42,435 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 19:13:42,435 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 2823 transitions. [2019-11-06 19:13:42,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2019-11-06 19:13:42,445 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:42,445 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:13:42,649 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:42,649 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:42,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:42,650 INFO L82 PathProgramCache]: Analyzing trace with hash -424736577, now seen corresponding path program 2 times [2019-11-06 19:13:42,650 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:42,650 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123672672] [2019-11-06 19:13:42,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:42,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:42,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:43,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:43,655 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 573 proven. 20 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-11-06 19:13:43,655 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123672672] [2019-11-06 19:13:43,656 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891398015] [2019-11-06 19:13:43,657 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 19:13:43,810 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 19:13:43,810 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 19:13:43,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:13:43,830 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:43,874 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:13:44,058 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 377 proven. 2 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-06 19:13:44,058 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:13:44,058 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-11-06 19:13:44,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620665823] [2019-11-06 19:13:44,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 19:13:44,060 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:44,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 19:13:44,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:13:44,061 INFO L87 Difference]: Start difference. First operand 2448 states and 2823 transitions. Second operand 17 states. [2019-11-06 19:13:49,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:49,942 INFO L93 Difference]: Finished difference Result 5508 states and 6555 transitions. [2019-11-06 19:13:49,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-06 19:13:49,943 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 450 [2019-11-06 19:13:49,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:49,959 INFO L225 Difference]: With dead ends: 5508 [2019-11-06 19:13:49,959 INFO L226 Difference]: Without dead ends: 3248 [2019-11-06 19:13:49,967 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 491 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=621, Invalid=2685, Unknown=0, NotChecked=0, Total=3306 [2019-11-06 19:13:49,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3248 states. [2019-11-06 19:13:50,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3248 to 2646. [2019-11-06 19:13:50,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2646 states. [2019-11-06 19:13:50,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2646 states to 2646 states and 2969 transitions. [2019-11-06 19:13:50,040 INFO L78 Accepts]: Start accepts. Automaton has 2646 states and 2969 transitions. Word has length 450 [2019-11-06 19:13:50,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:50,041 INFO L462 AbstractCegarLoop]: Abstraction has 2646 states and 2969 transitions. [2019-11-06 19:13:50,041 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-06 19:13:50,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2646 states and 2969 transitions. [2019-11-06 19:13:50,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2019-11-06 19:13:50,046 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:50,047 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1] [2019-11-06 19:13:50,254 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:50,254 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:50,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:50,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1199640678, now seen corresponding path program 1 times [2019-11-06 19:13:50,255 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:50,255 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219658561] [2019-11-06 19:13:50,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:50,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:50,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:51,498 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 573 proven. 20 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-11-06 19:13:51,498 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219658561] [2019-11-06 19:13:51,498 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420714959] [2019-11-06 19:13:51,499 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 19:13:51,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:51,662 INFO L256 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:13:51,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:51,723 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:13:52,040 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 377 proven. 2 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-06 19:13:52,040 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:13:52,041 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-11-06 19:13:52,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008367562] [2019-11-06 19:13:52,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 19:13:52,043 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:52,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 19:13:52,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:13:52,044 INFO L87 Difference]: Start difference. First operand 2646 states and 2969 transitions. Second operand 17 states.