/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/Problem01_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:55:49,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:55:49,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:55:49,353 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 18:55:49,362 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:55:49,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:55:49,383 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:55:49,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:55:49,385 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:55:49,386 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:55:49,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:55:49,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:55:49,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:55:49,392 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:55:49,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:55:49,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:55:49,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:55:49,418 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:55:49,418 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:55:49,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:55:49,423 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 18:55:49,443 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:55:49,443 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:55:49,444 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:55:49,445 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:55:49,445 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:55:49,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:55:49,445 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:55:49,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:55:49,445 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:55:49,446 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:55:49,446 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:55:49,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:55:49,446 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:55:49,446 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:55:49,446 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:55:49,447 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:55:49,447 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:55:49,447 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:55:49,447 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:55:49,447 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:55:49,448 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:55:49,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:55:49,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:55:49,448 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:55:49,448 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:55:49,449 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:55:49,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:55:49,449 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:55:49,449 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:55:49,763 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:55:49,781 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:55:49,785 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:55:49,786 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:55:49,786 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:55:49,787 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label21.c [2019-11-06 18:55:49,857 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/294678394/c6d202125e3f43d3a07cce0faa37783c/FLAGfb63d2171 [2019-11-06 18:55:50,430 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:55:50,436 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label21.c [2019-11-06 18:55:50,457 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/294678394/c6d202125e3f43d3a07cce0faa37783c/FLAGfb63d2171 [2019-11-06 18:55:50,710 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/294678394/c6d202125e3f43d3a07cce0faa37783c [2019-11-06 18:55:50,720 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:55:50,722 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:55:50,723 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:55:50,723 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:55:50,727 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:55:50,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:55:50" (1/1) ... [2019-11-06 18:55:50,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cee4a5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:55:50, skipping insertion in model container [2019-11-06 18:55:50,731 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:55:50" (1/1) ... [2019-11-06 18:55:50,738 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:55:50,796 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:55:51,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:55:51,292 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:55:51,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:55:51,439 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:55:51,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:55:51 WrapperNode [2019-11-06 18:55:51,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:55:51,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:55:51,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:55:51,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:55:51,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:55:51" (1/1) ... [2019-11-06 18:55:51,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:55:51" (1/1) ... [2019-11-06 18:55:51,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:55:51" (1/1) ... [2019-11-06 18:55:51,470 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:55:51" (1/1) ... [2019-11-06 18:55:51,521 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:55:51" (1/1) ... [2019-11-06 18:55:51,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:55:51" (1/1) ... [2019-11-06 18:55:51,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:55:51" (1/1) ... [2019-11-06 18:55:51,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:55:51,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:55:51,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:55:51,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:55:51,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:55:51" (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 18:55:51,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:55:51,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:55:51,607 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 18:55:51,608 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:55:51,608 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 18:55:51,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:55:51,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:55:51,608 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 18:55:51,608 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:55:51,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:55:51,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:55:52,719 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:55:52,719 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 18:55:52,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:55:52 BoogieIcfgContainer [2019-11-06 18:55:52,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:55:52,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:55:52,722 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:55:52,725 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:55:52,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:55:50" (1/3) ... [2019-11-06 18:55:52,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b6e31e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:55:52, skipping insertion in model container [2019-11-06 18:55:52,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:55:51" (2/3) ... [2019-11-06 18:55:52,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b6e31e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:55:52, skipping insertion in model container [2019-11-06 18:55:52,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:55:52" (3/3) ... [2019-11-06 18:55:52,730 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label21.c [2019-11-06 18:55:52,740 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:55:52,749 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:55:52,760 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:55:52,801 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:55:52,802 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:55:52,802 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:55:52,802 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:55:52,802 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:55:52,803 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:55:52,803 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:55:52,803 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:55:52,837 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-11-06 18:55:52,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-06 18:55:52,851 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:55:52,852 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:55:52,855 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:55:52,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:55:52,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1860977577, now seen corresponding path program 1 times [2019-11-06 18:55:52,872 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:55:52,872 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948294258] [2019-11-06 18:55:52,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:55:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:55:53,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:55:53,491 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 18:55:53,492 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948294258] [2019-11-06 18:55:53,493 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:55:53,493 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:55:53,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478344576] [2019-11-06 18:55:53,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:55:53,500 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:55:53,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:55:53,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:55:53,518 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 5 states. [2019-11-06 18:55:55,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:55:55,617 INFO L93 Difference]: Finished difference Result 723 states and 1255 transitions. [2019-11-06 18:55:55,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:55:55,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2019-11-06 18:55:55,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:55:55,656 INFO L225 Difference]: With dead ends: 723 [2019-11-06 18:55:55,657 INFO L226 Difference]: Without dead ends: 423 [2019-11-06 18:55:55,671 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:55:55,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2019-11-06 18:55:55,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 417. [2019-11-06 18:55:55,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2019-11-06 18:55:55,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 584 transitions. [2019-11-06 18:55:55,760 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 584 transitions. Word has length 89 [2019-11-06 18:55:55,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:55:55,761 INFO L462 AbstractCegarLoop]: Abstraction has 417 states and 584 transitions. [2019-11-06 18:55:55,761 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:55:55,762 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 584 transitions. [2019-11-06 18:55:55,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-06 18:55:55,768 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:55:55,768 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 18:55:55,769 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:55:55,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:55:55,769 INFO L82 PathProgramCache]: Analyzing trace with hash 64410272, now seen corresponding path program 1 times [2019-11-06 18:55:55,770 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:55:55,770 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481669232] [2019-11-06 18:55:55,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:55:55,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:55:55,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:55:55,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:55:56,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:55:56,020 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481669232] [2019-11-06 18:55:56,021 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:55:56,021 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 18:55:56,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939873760] [2019-11-06 18:55:56,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:55:56,024 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:55:56,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:55:56,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:55:56,025 INFO L87 Difference]: Start difference. First operand 417 states and 584 transitions. Second operand 9 states. [2019-11-06 18:55:57,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:55:57,372 INFO L93 Difference]: Finished difference Result 1269 states and 1843 transitions. [2019-11-06 18:55:57,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:55:57,373 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 99 [2019-11-06 18:55:57,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:55:57,380 INFO L225 Difference]: With dead ends: 1269 [2019-11-06 18:55:57,381 INFO L226 Difference]: Without dead ends: 858 [2019-11-06 18:55:57,383 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:55:57,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2019-11-06 18:55:57,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 834. [2019-11-06 18:55:57,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 834 states. [2019-11-06 18:55:57,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1168 transitions. [2019-11-06 18:55:57,447 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1168 transitions. Word has length 99 [2019-11-06 18:55:57,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:55:57,449 INFO L462 AbstractCegarLoop]: Abstraction has 834 states and 1168 transitions. [2019-11-06 18:55:57,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:55:57,450 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1168 transitions. [2019-11-06 18:55:57,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-06 18:55:57,467 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:55:57,467 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:55:57,468 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:55:57,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:55:57,468 INFO L82 PathProgramCache]: Analyzing trace with hash 899392414, now seen corresponding path program 1 times [2019-11-06 18:55:57,468 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:55:57,469 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759802892] [2019-11-06 18:55:57,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:55:57,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:55:57,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:55:57,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:55:57,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:55:57,713 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759802892] [2019-11-06 18:55:57,714 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505886631] [2019-11-06 18:55:57,714 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 18:55:57,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:55:57,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:55:57,837 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:55:57,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:55:57,920 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:55:57,920 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 18:55:57,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095666977] [2019-11-06 18:55:57,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:55:57,927 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:55:57,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:55:57,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:55:57,928 INFO L87 Difference]: Start difference. First operand 834 states and 1168 transitions. Second operand 3 states. [2019-11-06 18:55:58,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:55:58,478 INFO L93 Difference]: Finished difference Result 2073 states and 2931 transitions. [2019-11-06 18:55:58,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:55:58,478 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2019-11-06 18:55:58,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:55:58,487 INFO L225 Difference]: With dead ends: 2073 [2019-11-06 18:55:58,487 INFO L226 Difference]: Without dead ends: 1245 [2019-11-06 18:55:58,490 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:55:58,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2019-11-06 18:55:58,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 1245. [2019-11-06 18:55:58,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1245 states. [2019-11-06 18:55:58,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 1694 transitions. [2019-11-06 18:55:58,536 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 1694 transitions. Word has length 100 [2019-11-06 18:55:58,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:55:58,537 INFO L462 AbstractCegarLoop]: Abstraction has 1245 states and 1694 transitions. [2019-11-06 18:55:58,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:55:58,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 1694 transitions. [2019-11-06 18:55:58,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-06 18:55:58,541 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:55:58,541 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 18:55:58,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:55:58,744 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:55:58,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:55:58,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1802371290, now seen corresponding path program 1 times [2019-11-06 18:55:58,745 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:55:58,745 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416675905] [2019-11-06 18:55:58,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:55:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:55:58,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:55:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:55:58,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:55:58,965 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416675905] [2019-11-06 18:55:58,965 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276659479] [2019-11-06 18:55:58,965 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 18:55:59,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:55:59,070 INFO L256 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:55:59,086 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:55:59,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:55:59,130 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:55:59,130 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 18:55:59,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259238953] [2019-11-06 18:55:59,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:55:59,132 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:55:59,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:55:59,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:55:59,133 INFO L87 Difference]: Start difference. First operand 1245 states and 1694 transitions. Second operand 3 states. [2019-11-06 18:55:59,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:55:59,711 INFO L93 Difference]: Finished difference Result 2895 states and 4002 transitions. [2019-11-06 18:55:59,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:55:59,713 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 104 [2019-11-06 18:55:59,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:55:59,721 INFO L225 Difference]: With dead ends: 2895 [2019-11-06 18:55:59,721 INFO L226 Difference]: Without dead ends: 1656 [2019-11-06 18:55:59,725 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:55:59,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2019-11-06 18:55:59,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1656. [2019-11-06 18:55:59,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1656 states. [2019-11-06 18:55:59,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 2202 transitions. [2019-11-06 18:55:59,776 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 2202 transitions. Word has length 104 [2019-11-06 18:55:59,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:55:59,777 INFO L462 AbstractCegarLoop]: Abstraction has 1656 states and 2202 transitions. [2019-11-06 18:55:59,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:55:59,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 2202 transitions. [2019-11-06 18:55:59,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-06 18:55:59,781 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:55:59,781 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 18:55:59,992 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:55:59,993 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:55:59,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:55:59,994 INFO L82 PathProgramCache]: Analyzing trace with hash 440143631, now seen corresponding path program 1 times [2019-11-06 18:55:59,994 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:55:59,994 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863061341] [2019-11-06 18:55:59,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:56:00,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:00,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:00,187 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:56:00,187 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863061341] [2019-11-06 18:56:00,188 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866509732] [2019-11-06 18:56:00,188 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 18:56:00,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:00,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:56:00,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:56:00,328 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 18:56:00,328 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:56:00,329 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-11-06 18:56:00,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395658404] [2019-11-06 18:56:00,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:56:00,331 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:56:00,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:56:00,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:56:00,331 INFO L87 Difference]: Start difference. First operand 1656 states and 2202 transitions. Second operand 3 states. [2019-11-06 18:56:00,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:56:00,910 INFO L93 Difference]: Finished difference Result 3306 states and 4417 transitions. [2019-11-06 18:56:00,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:56:00,911 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 123 [2019-11-06 18:56:00,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:56:00,919 INFO L225 Difference]: With dead ends: 3306 [2019-11-06 18:56:00,919 INFO L226 Difference]: Without dead ends: 1656 [2019-11-06 18:56:00,923 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:56:00,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2019-11-06 18:56:00,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1656. [2019-11-06 18:56:00,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1656 states. [2019-11-06 18:56:00,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 2113 transitions. [2019-11-06 18:56:00,975 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 2113 transitions. Word has length 123 [2019-11-06 18:56:00,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:56:00,975 INFO L462 AbstractCegarLoop]: Abstraction has 1656 states and 2113 transitions. [2019-11-06 18:56:00,975 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:56:00,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 2113 transitions. [2019-11-06 18:56:00,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-06 18:56:00,979 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:56:00,980 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 18:56:01,191 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:56:01,191 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:56:01,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:56:01,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1837248573, now seen corresponding path program 1 times [2019-11-06 18:56:01,192 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:56:01,192 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992414861] [2019-11-06 18:56:01,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:56:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:01,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:56:01,356 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992414861] [2019-11-06 18:56:01,356 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072994102] [2019-11-06 18:56:01,357 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 18:56:01,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:01,446 INFO L256 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:56:01,449 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:56:01,486 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:56:01,487 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:56:01,487 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 18:56:01,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742815641] [2019-11-06 18:56:01,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:56:01,488 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:56:01,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:56:01,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:56:01,489 INFO L87 Difference]: Start difference. First operand 1656 states and 2113 transitions. Second operand 3 states. [2019-11-06 18:56:02,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:56:02,075 INFO L93 Difference]: Finished difference Result 4126 states and 5318 transitions. [2019-11-06 18:56:02,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:56:02,075 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2019-11-06 18:56:02,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:56:02,087 INFO L225 Difference]: With dead ends: 4126 [2019-11-06 18:56:02,087 INFO L226 Difference]: Without dead ends: 2476 [2019-11-06 18:56:02,091 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:56:02,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2019-11-06 18:56:02,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 2069. [2019-11-06 18:56:02,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2069 states. [2019-11-06 18:56:02,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 2647 transitions. [2019-11-06 18:56:02,162 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 2647 transitions. Word has length 124 [2019-11-06 18:56:02,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:56:02,162 INFO L462 AbstractCegarLoop]: Abstraction has 2069 states and 2647 transitions. [2019-11-06 18:56:02,162 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:56:02,162 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 2647 transitions. [2019-11-06 18:56:02,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-06 18:56:02,167 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:56:02,167 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, 1, 1] [2019-11-06 18:56:02,379 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:56:02,380 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:56:02,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:56:02,380 INFO L82 PathProgramCache]: Analyzing trace with hash -715011120, now seen corresponding path program 1 times [2019-11-06 18:56:02,380 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:56:02,381 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034340461] [2019-11-06 18:56:02,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:56:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:02,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:02,527 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 18:56:02,527 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034340461] [2019-11-06 18:56:02,528 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124691540] [2019-11-06 18:56:02,528 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 18:56:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:02,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:56:02,615 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:56:02,640 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 18:56:02,641 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:56:02,641 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-11-06 18:56:02,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590313932] [2019-11-06 18:56:02,642 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:56:02,642 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:56:02,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:56:02,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:56:02,643 INFO L87 Difference]: Start difference. First operand 2069 states and 2647 transitions. Second operand 3 states. [2019-11-06 18:56:03,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:56:03,160 INFO L93 Difference]: Finished difference Result 5363 states and 6990 transitions. [2019-11-06 18:56:03,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:56:03,160 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 123 [2019-11-06 18:56:03,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:56:03,177 INFO L225 Difference]: With dead ends: 5363 [2019-11-06 18:56:03,177 INFO L226 Difference]: Without dead ends: 3300 [2019-11-06 18:56:03,182 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:56:03,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3300 states. [2019-11-06 18:56:03,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3300 to 3161. [2019-11-06 18:56:03,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3161 states. [2019-11-06 18:56:03,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3161 states to 3161 states and 4057 transitions. [2019-11-06 18:56:03,278 INFO L78 Accepts]: Start accepts. Automaton has 3161 states and 4057 transitions. Word has length 123 [2019-11-06 18:56:03,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:56:03,279 INFO L462 AbstractCegarLoop]: Abstraction has 3161 states and 4057 transitions. [2019-11-06 18:56:03,279 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:56:03,279 INFO L276 IsEmpty]: Start isEmpty. Operand 3161 states and 4057 transitions. [2019-11-06 18:56:03,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-11-06 18:56:03,287 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:56:03,288 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:56:03,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:56:03,491 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:56:03,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:56:03,492 INFO L82 PathProgramCache]: Analyzing trace with hash -2016706982, now seen corresponding path program 1 times [2019-11-06 18:56:03,492 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:56:03,492 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209245736] [2019-11-06 18:56:03,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:56:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:03,940 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:56:03,940 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209245736] [2019-11-06 18:56:03,941 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:56:03,941 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-06 18:56:03,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390789741] [2019-11-06 18:56:03,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:56:03,942 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:56:03,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:56:03,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:56:03,943 INFO L87 Difference]: Start difference. First operand 3161 states and 4057 transitions. Second operand 10 states. [2019-11-06 18:56:05,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:56:05,891 INFO L93 Difference]: Finished difference Result 7180 states and 9292 transitions. [2019-11-06 18:56:05,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:56:05,892 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 162 [2019-11-06 18:56:05,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:56:05,912 INFO L225 Difference]: With dead ends: 7180 [2019-11-06 18:56:05,912 INFO L226 Difference]: Without dead ends: 4025 [2019-11-06 18:56:05,920 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:56:05,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4025 states. [2019-11-06 18:56:06,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4025 to 3185. [2019-11-06 18:56:06,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3185 states. [2019-11-06 18:56:06,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3185 states to 3185 states and 3929 transitions. [2019-11-06 18:56:06,014 INFO L78 Accepts]: Start accepts. Automaton has 3185 states and 3929 transitions. Word has length 162 [2019-11-06 18:56:06,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:56:06,014 INFO L462 AbstractCegarLoop]: Abstraction has 3185 states and 3929 transitions. [2019-11-06 18:56:06,014 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:56:06,015 INFO L276 IsEmpty]: Start isEmpty. Operand 3185 states and 3929 transitions. [2019-11-06 18:56:06,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-06 18:56:06,024 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:56:06,024 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 18:56:06,024 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:56:06,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:56:06,025 INFO L82 PathProgramCache]: Analyzing trace with hash 155487987, now seen corresponding path program 1 times [2019-11-06 18:56:06,026 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:56:06,029 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458113000] [2019-11-06 18:56:06,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:56:06,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:06,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:06,386 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:56:06,386 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458113000] [2019-11-06 18:56:06,386 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368498106] [2019-11-06 18:56:06,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:56:06,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:06,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 18:56:06,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:56:06,590 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 87 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:56:06,590 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:56:06,591 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 18:56:06,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214245966] [2019-11-06 18:56:06,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:56:06,592 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:56:06,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:56:06,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:56:06,592 INFO L87 Difference]: Start difference. First operand 3185 states and 3929 transitions. Second operand 11 states. [2019-11-06 18:56:10,993 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2019-11-06 18:56:11,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:56:11,226 INFO L93 Difference]: Finished difference Result 7738 states and 9623 transitions. [2019-11-06 18:56:11,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-06 18:56:11,227 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 173 [2019-11-06 18:56:11,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:56:11,246 INFO L225 Difference]: With dead ends: 7738 [2019-11-06 18:56:11,246 INFO L226 Difference]: Without dead ends: 4001 [2019-11-06 18:56:11,257 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=226, Invalid=830, Unknown=0, NotChecked=0, Total=1056 [2019-11-06 18:56:11,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2019-11-06 18:56:11,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 3721. [2019-11-06 18:56:11,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3721 states. [2019-11-06 18:56:11,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3721 states to 3721 states and 4202 transitions. [2019-11-06 18:56:11,361 INFO L78 Accepts]: Start accepts. Automaton has 3721 states and 4202 transitions. Word has length 173 [2019-11-06 18:56:11,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:56:11,361 INFO L462 AbstractCegarLoop]: Abstraction has 3721 states and 4202 transitions. [2019-11-06 18:56:11,361 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:56:11,361 INFO L276 IsEmpty]: Start isEmpty. Operand 3721 states and 4202 transitions. [2019-11-06 18:56:11,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-11-06 18:56:11,373 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:56:11,373 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:56:11,577 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:56:11,578 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:56:11,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:56:11,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1184249373, now seen corresponding path program 1 times [2019-11-06 18:56:11,578 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:56:11,579 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336192400] [2019-11-06 18:56:11,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:56:11,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:12,017 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:56:12,018 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336192400] [2019-11-06 18:56:12,018 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653125179] [2019-11-06 18:56:12,018 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 18:56:12,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:12,304 INFO L256 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-06 18:56:12,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:56:12,403 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 18:56:12,480 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 18:56:12,481 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:56:12,481 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2019-11-06 18:56:12,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930559592] [2019-11-06 18:56:12,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:56:12,484 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:56:12,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:56:12,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:56:12,485 INFO L87 Difference]: Start difference. First operand 3721 states and 4202 transitions. Second operand 6 states. [2019-11-06 18:56:13,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:56:13,444 INFO L93 Difference]: Finished difference Result 7309 states and 8280 transitions. [2019-11-06 18:56:13,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:56:13,445 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 181 [2019-11-06 18:56:13,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:56:13,459 INFO L225 Difference]: With dead ends: 7309 [2019-11-06 18:56:13,459 INFO L226 Difference]: Without dead ends: 3729 [2019-11-06 18:56:13,466 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:56:13,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2019-11-06 18:56:13,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 3723. [2019-11-06 18:56:13,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3723 states. [2019-11-06 18:56:13,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3723 states to 3723 states and 4184 transitions. [2019-11-06 18:56:13,552 INFO L78 Accepts]: Start accepts. Automaton has 3723 states and 4184 transitions. Word has length 181 [2019-11-06 18:56:13,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:56:13,553 INFO L462 AbstractCegarLoop]: Abstraction has 3723 states and 4184 transitions. [2019-11-06 18:56:13,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:56:13,553 INFO L276 IsEmpty]: Start isEmpty. Operand 3723 states and 4184 transitions. [2019-11-06 18:56:13,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-11-06 18:56:13,567 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:56:13,567 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 18:56:13,767 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:56:13,768 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:56:13,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:56:13,768 INFO L82 PathProgramCache]: Analyzing trace with hash -2133513752, now seen corresponding path program 1 times [2019-11-06 18:56:13,768 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:56:13,768 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712940350] [2019-11-06 18:56:13,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:56:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:13,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:13,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:13,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:14,082 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 100 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 18:56:14,082 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712940350] [2019-11-06 18:56:14,083 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935009244] [2019-11-06 18:56:14,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:56:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:14,228 INFO L256 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:56:14,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:56:14,265 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 18:56:14,329 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 18:56:14,330 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:56:14,330 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-06 18:56:14,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502681399] [2019-11-06 18:56:14,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:56:14,335 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:56:14,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:56:14,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:56:14,335 INFO L87 Difference]: Start difference. First operand 3723 states and 4184 transitions. Second operand 12 states. [2019-11-06 18:56:15,903 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2019-11-06 18:56:16,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:56:16,534 INFO L93 Difference]: Finished difference Result 7313 states and 8238 transitions. [2019-11-06 18:56:16,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 18:56:16,536 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 189 [2019-11-06 18:56:16,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:56:16,556 INFO L225 Difference]: With dead ends: 7313 [2019-11-06 18:56:16,556 INFO L226 Difference]: Without dead ends: 3731 [2019-11-06 18:56:16,562 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 203 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2019-11-06 18:56:16,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3731 states. [2019-11-06 18:56:16,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3731 to 3725. [2019-11-06 18:56:16,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3725 states. [2019-11-06 18:56:16,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3725 states to 3725 states and 4145 transitions. [2019-11-06 18:56:16,647 INFO L78 Accepts]: Start accepts. Automaton has 3725 states and 4145 transitions. Word has length 189 [2019-11-06 18:56:16,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:56:16,647 INFO L462 AbstractCegarLoop]: Abstraction has 3725 states and 4145 transitions. [2019-11-06 18:56:16,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:56:16,649 INFO L276 IsEmpty]: Start isEmpty. Operand 3725 states and 4145 transitions. [2019-11-06 18:56:16,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-11-06 18:56:16,658 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:56:16,658 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 18:56:16,862 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:56:16,862 INFO L410 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:56:16,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:56:16,863 INFO L82 PathProgramCache]: Analyzing trace with hash -937296905, now seen corresponding path program 1 times [2019-11-06 18:56:16,863 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:56:16,863 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629865684] [2019-11-06 18:56:16,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:56:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:16,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:17,177 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 146 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:56:17,177 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629865684] [2019-11-06 18:56:17,177 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354848485] [2019-11-06 18:56:17,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:56:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:17,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 18:56:17,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:56:17,359 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 147 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:56:17,359 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:56:17,359 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-06 18:56:17,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168831953] [2019-11-06 18:56:17,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:56:17,360 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:56:17,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:56:17,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:56:17,361 INFO L87 Difference]: Start difference. First operand 3725 states and 4145 transitions. Second operand 12 states. [2019-11-06 18:56:19,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:56:19,748 INFO L93 Difference]: Finished difference Result 6136 states and 6853 transitions. [2019-11-06 18:56:19,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 18:56:19,749 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 203 [2019-11-06 18:56:19,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:56:19,760 INFO L225 Difference]: With dead ends: 6136 [2019-11-06 18:56:19,760 INFO L226 Difference]: Without dead ends: 3900 [2019-11-06 18:56:19,765 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2019-11-06 18:56:19,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3900 states. [2019-11-06 18:56:19,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3900 to 2375. [2019-11-06 18:56:19,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2375 states. [2019-11-06 18:56:19,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2375 states to 2375 states and 2586 transitions. [2019-11-06 18:56:19,823 INFO L78 Accepts]: Start accepts. Automaton has 2375 states and 2586 transitions. Word has length 203 [2019-11-06 18:56:19,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:56:19,823 INFO L462 AbstractCegarLoop]: Abstraction has 2375 states and 2586 transitions. [2019-11-06 18:56:19,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:56:19,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2375 states and 2586 transitions. [2019-11-06 18:56:19,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2019-11-06 18:56:19,831 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:56:19,831 INFO L410 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:56:20,036 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:56:20,037 INFO L410 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:56:20,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:56:20,037 INFO L82 PathProgramCache]: Analyzing trace with hash 120068915, now seen corresponding path program 1 times [2019-11-06 18:56:20,038 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:56:20,038 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046484939] [2019-11-06 18:56:20,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:56:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:20,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:21,295 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 302 proven. 6 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-06 18:56:21,296 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046484939] [2019-11-06 18:56:21,296 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98974600] [2019-11-06 18:56:21,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:56:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:56:21,424 INFO L256 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:56:21,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:56:21,486 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:56:21,595 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 297 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-06 18:56:21,596 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:56:21,596 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-11-06 18:56:21,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963577047] [2019-11-06 18:56:21,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:56:21,597 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:56:21,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:56:21,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:56:21,598 INFO L87 Difference]: Start difference. First operand 2375 states and 2586 transitions. Second operand 16 states. [2019-11-06 18:56:21,891 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2019-11-06 18:56:22,605 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2019-11-06 18:56:22,752 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2019-11-06 18:56:23,066 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2019-11-06 18:56:23,530 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2019-11-06 18:56:23,806 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 71 [2019-11-06 18:56:24,677 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2019-11-06 18:56:25,476 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2019-11-06 18:56:25,753 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2019-11-06 18:56:26,067 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51