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/Problem15_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:02:50,498 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:02:50,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:02:50,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:02:50,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:02:50,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:02:50,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:02:50,516 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:02:50,518 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:02:50,519 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:02:50,520 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:02:50,521 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:02:50,521 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:02:50,522 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:02:50,523 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:02:50,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:02:50,525 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:02:50,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:02:50,527 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:02:50,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:02:50,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:02:50,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:02:50,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:02:50,539 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:02:50,544 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:02:50,549 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:02:50,550 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:02:50,553 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:02:50,554 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:02:50,555 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:02:50,555 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:02:50,558 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:02:50,558 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:02:50,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:02:50,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:02:50,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:02:50,560 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 [2019-10-14 22:02:50,582 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:02:50,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:02:50,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:02:50,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:02:50,584 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:02:50,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:02:50,585 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:02:50,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:02:50,585 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:02:50,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:02:50,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:02:50,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:02:50,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:02:50,587 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:02:50,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:02:50,587 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:02:50,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:02:50,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:02:50,588 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:02:50,588 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:02:50,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:02:50,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:02:50,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:02:50,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:02:50,589 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:02:50,589 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:02:50,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:02:50,590 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:02:50,590 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:02:50,857 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:02:50,869 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:02:50,873 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:02:50,874 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:02:50,875 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:02:50,875 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label17.c [2019-10-14 22:02:50,948 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/525490403/ef885a7e5efd400ca3dffec3b636cab0/FLAG3874d530b [2019-10-14 22:02:51,645 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:02:51,645 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label17.c [2019-10-14 22:02:51,667 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/525490403/ef885a7e5efd400ca3dffec3b636cab0/FLAG3874d530b [2019-10-14 22:02:51,837 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/525490403/ef885a7e5efd400ca3dffec3b636cab0 [2019-10-14 22:02:51,849 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:02:51,850 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:02:51,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:02:51,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:02:51,858 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:02:51,859 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:02:51" (1/1) ... [2019-10-14 22:02:51,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b536ee0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:51, skipping insertion in model container [2019-10-14 22:02:51,862 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:02:51" (1/1) ... [2019-10-14 22:02:51,869 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:02:51,965 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:02:52,842 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:02:52,856 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:02:53,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:02:53,438 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:02:53,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:53 WrapperNode [2019-10-14 22:02:53,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:02:53,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:02:53,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:02:53,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:02:53,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:53" (1/1) ... [2019-10-14 22:02:53,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:53" (1/1) ... [2019-10-14 22:02:53,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:53" (1/1) ... [2019-10-14 22:02:53,530 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:53" (1/1) ... [2019-10-14 22:02:53,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:53" (1/1) ... [2019-10-14 22:02:53,654 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:53" (1/1) ... [2019-10-14 22:02:53,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:53" (1/1) ... [2019-10-14 22:02:53,702 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:02:53,703 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:02:53,703 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:02:53,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:02:53,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:53" (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 [2019-10-14 22:02:53,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:02:53,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:02:53,775 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:02:53,775 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:02:53,775 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:02:53,776 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:02:53,776 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:02:53,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:02:53,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:02:53,777 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:02:53,777 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:02:53,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:02:53,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:02:57,002 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:02:57,002 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:02:57,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:02:57 BoogieIcfgContainer [2019-10-14 22:02:57,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:02:57,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:02:57,015 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:02:57,018 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:02:57,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:02:51" (1/3) ... [2019-10-14 22:02:57,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33c63b6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:02:57, skipping insertion in model container [2019-10-14 22:02:57,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:53" (2/3) ... [2019-10-14 22:02:57,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33c63b6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:02:57, skipping insertion in model container [2019-10-14 22:02:57,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:02:57" (3/3) ... [2019-10-14 22:02:57,030 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label17.c [2019-10-14 22:02:57,045 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:02:57,056 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:02:57,068 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:02:57,112 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:02:57,112 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:02:57,112 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:02:57,113 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:02:57,113 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:02:57,113 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:02:57,113 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:02:57,113 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:02:57,152 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-14 22:02:57,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-14 22:02:57,166 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:57,167 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:57,170 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:57,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:57,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1566506531, now seen corresponding path program 1 times [2019-10-14 22:02:57,186 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:57,187 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125773003] [2019-10-14 22:02:57,187 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:57,187 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:57,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:57,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:57,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:57,607 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125773003] [2019-10-14 22:02:57,608 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:02:57,608 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:02:57,608 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257557267] [2019-10-14 22:02:57,613 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:57,613 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:57,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:57,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:02:57,630 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 5 states. [2019-10-14 22:03:04,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:04,867 INFO L93 Difference]: Finished difference Result 1528 states and 2801 transitions. [2019-10-14 22:03:04,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:03:04,869 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2019-10-14 22:03:04,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:04,899 INFO L225 Difference]: With dead ends: 1528 [2019-10-14 22:03:04,900 INFO L226 Difference]: Without dead ends: 1022 [2019-10-14 22:03:04,910 INFO L600 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 [2019-10-14 22:03:04,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2019-10-14 22:03:05,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 1016. [2019-10-14 22:03:05,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1016 states. [2019-10-14 22:03:05,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1523 transitions. [2019-10-14 22:03:05,031 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1523 transitions. Word has length 69 [2019-10-14 22:03:05,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:05,032 INFO L462 AbstractCegarLoop]: Abstraction has 1016 states and 1523 transitions. [2019-10-14 22:03:05,033 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:03:05,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1523 transitions. [2019-10-14 22:03:05,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-14 22:03:05,040 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:05,041 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:03:05,041 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:05,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:05,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1392036326, now seen corresponding path program 1 times [2019-10-14 22:03:05,042 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:05,042 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528540939] [2019-10-14 22:03:05,042 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:05,043 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:05,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:05,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:05,381 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 61 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:03:05,382 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528540939] [2019-10-14 22:03:05,382 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360956969] [2019-10-14 22:03:05,383 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 [2019-10-14 22:03:05,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:05,487 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:03:05,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:05,589 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:03:05,589 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:03:05,590 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:03:05,591 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656560376] [2019-10-14 22:03:05,595 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:03:05,596 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:05,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:03:05,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:03:05,597 INFO L87 Difference]: Start difference. First operand 1016 states and 1523 transitions. Second operand 3 states. [2019-10-14 22:03:07,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:07,858 INFO L93 Difference]: Finished difference Result 2961 states and 4483 transitions. [2019-10-14 22:03:07,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:03:07,859 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2019-10-14 22:03:07,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:07,871 INFO L225 Difference]: With dead ends: 2961 [2019-10-14 22:03:07,872 INFO L226 Difference]: Without dead ends: 1951 [2019-10-14 22:03:07,876 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:03:07,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2019-10-14 22:03:07,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1949. [2019-10-14 22:03:07,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1949 states. [2019-10-14 22:03:07,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 2576 transitions. [2019-10-14 22:03:07,947 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 2576 transitions. Word has length 138 [2019-10-14 22:03:07,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:07,950 INFO L462 AbstractCegarLoop]: Abstraction has 1949 states and 2576 transitions. [2019-10-14 22:03:07,950 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:03:07,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 2576 transitions. [2019-10-14 22:03:07,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2019-10-14 22:03:07,966 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:07,967 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:08,170 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:08,171 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:08,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:08,172 INFO L82 PathProgramCache]: Analyzing trace with hash -124404866, now seen corresponding path program 1 times [2019-10-14 22:03:08,173 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:08,173 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112310048] [2019-10-14 22:03:08,173 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:08,174 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:08,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:08,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:08,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:08,518 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-14 22:03:08,519 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112310048] [2019-10-14 22:03:08,519 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071821261] [2019-10-14 22:03:08,520 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 [2019-10-14 22:03:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:08,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 22:03:08,651 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:08,827 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-14 22:03:08,827 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:03:08,828 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-10-14 22:03:08,828 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451228464] [2019-10-14 22:03:08,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 22:03:08,830 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:08,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 22:03:08,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:03:08,830 INFO L87 Difference]: Start difference. First operand 1949 states and 2576 transitions. Second operand 8 states. [2019-10-14 22:03:14,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:14,456 INFO L93 Difference]: Finished difference Result 5832 states and 7801 transitions. [2019-10-14 22:03:14,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 22:03:14,456 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 247 [2019-10-14 22:03:14,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:14,483 INFO L225 Difference]: With dead ends: 5832 [2019-10-14 22:03:14,483 INFO L226 Difference]: Without dead ends: 3889 [2019-10-14 22:03:14,489 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:03:14,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3889 states. [2019-10-14 22:03:14,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3889 to 3540. [2019-10-14 22:03:14,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3540 states. [2019-10-14 22:03:14,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 4406 transitions. [2019-10-14 22:03:14,594 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 4406 transitions. Word has length 247 [2019-10-14 22:03:14,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:14,595 INFO L462 AbstractCegarLoop]: Abstraction has 3540 states and 4406 transitions. [2019-10-14 22:03:14,596 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 22:03:14,596 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 4406 transitions. [2019-10-14 22:03:14,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2019-10-14 22:03:14,603 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:14,603 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:14,815 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:14,816 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:14,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:14,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1830477260, now seen corresponding path program 1 times [2019-10-14 22:03:14,818 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:14,818 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779994587] [2019-10-14 22:03:14,819 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:14,819 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:14,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:14,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:15,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:15,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:15,236 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-14 22:03:15,237 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779994587] [2019-10-14 22:03:15,237 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490941036] [2019-10-14 22:03:15,237 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 [2019-10-14 22:03:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:15,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:03:15,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:15,513 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-14 22:03:15,514 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:03:15,514 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:03:15,514 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254710484] [2019-10-14 22:03:15,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:03:15,516 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:15,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:03:15,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:03:15,517 INFO L87 Difference]: Start difference. First operand 3540 states and 4406 transitions. Second operand 3 states. [2019-10-14 22:03:17,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:17,575 INFO L93 Difference]: Finished difference Result 8943 states and 11478 transitions. [2019-10-14 22:03:17,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:03:17,582 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 349 [2019-10-14 22:03:17,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:17,613 INFO L225 Difference]: With dead ends: 8943 [2019-10-14 22:03:17,613 INFO L226 Difference]: Without dead ends: 5409 [2019-10-14 22:03:17,623 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 354 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:03:17,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5409 states. [2019-10-14 22:03:17,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5409 to 5102. [2019-10-14 22:03:17,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5102 states. [2019-10-14 22:03:17,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5102 states to 5102 states and 6524 transitions. [2019-10-14 22:03:17,803 INFO L78 Accepts]: Start accepts. Automaton has 5102 states and 6524 transitions. Word has length 349 [2019-10-14 22:03:17,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:17,804 INFO L462 AbstractCegarLoop]: Abstraction has 5102 states and 6524 transitions. [2019-10-14 22:03:17,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:03:17,804 INFO L276 IsEmpty]: Start isEmpty. Operand 5102 states and 6524 transitions. [2019-10-14 22:03:17,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2019-10-14 22:03:17,815 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:17,816 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:18,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:18,025 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:18,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:18,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1309734060, now seen corresponding path program 1 times [2019-10-14 22:03:18,026 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:18,026 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903303770] [2019-10-14 22:03:18,027 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:18,027 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:18,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:18,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:18,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:18,613 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 347 proven. 2 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-14 22:03:18,614 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903303770] [2019-10-14 22:03:18,614 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391476253] [2019-10-14 22:03:18,614 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 [2019-10-14 22:03:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:18,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:03:18,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:19,064 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 349 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-14 22:03:19,064 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:03:19,065 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:03:19,065 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275914757] [2019-10-14 22:03:19,067 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:03:19,068 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:19,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:03:19,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:03:19,069 INFO L87 Difference]: Start difference. First operand 5102 states and 6524 transitions. Second operand 11 states. [2019-10-14 22:03:29,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:29,499 INFO L93 Difference]: Finished difference Result 14622 states and 20498 transitions. [2019-10-14 22:03:29,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 22:03:29,500 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 431 [2019-10-14 22:03:29,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:29,563 INFO L225 Difference]: With dead ends: 14622 [2019-10-14 22:03:29,563 INFO L226 Difference]: Without dead ends: 9526 [2019-10-14 22:03:29,582 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 453 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=236, Invalid=634, Unknown=0, NotChecked=0, Total=870 [2019-10-14 22:03:29,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9526 states.