/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:52:53,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:52:53,596 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:52:53,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:52:53,637 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:52:53,647 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:52:53,651 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:52:53,652 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:52:53,655 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:52:53,656 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:52:53,657 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:52:53,659 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:52:53,660 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:52:53,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:52:53,666 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:52:53,667 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:52:53,669 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:52:53,670 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:52:53,674 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:52:53,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:52:53,681 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:52:53,682 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:52:53,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:52:53,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:52:53,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:52:53,689 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:52:53,689 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:52:53,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:52:53,692 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:52:53,693 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:52:53,693 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:52:53,694 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:52:53,694 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:52:53,695 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:52:53,696 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:52:53,696 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:52:53,697 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:52:53,697 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:52:53,698 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:52:53,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:52:53,700 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:52:53,701 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 14:52:53,740 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:52:53,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:52:53,743 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:52:53,743 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:52:53,743 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:52:53,744 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:52:53,744 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:52:53,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:52:53,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:52:53,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:52:53,745 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:52:53,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:52:53,746 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:52:53,746 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:52:53,746 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:52:53,746 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:52:53,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:52:53,747 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:52:53,747 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:52:53,747 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:52:53,747 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:52:53,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:52:53,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:52:53,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:52:53,748 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:52:53,748 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:52:53,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:52:53,749 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:52:53,749 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:52:53,749 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 14:52:54,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:52:54,025 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:52:54,029 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:52:54,030 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:52:54,030 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:52:54,031 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-13 14:52:54,087 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/00eef1dcd/1335dd7aec354c8b987d3f1d8dc7062b/FLAG429e0358b [2020-10-13 14:52:54,539 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:52:54,539 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-13 14:52:54,552 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/00eef1dcd/1335dd7aec354c8b987d3f1d8dc7062b/FLAG429e0358b [2020-10-13 14:52:54,857 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/00eef1dcd/1335dd7aec354c8b987d3f1d8dc7062b [2020-10-13 14:52:54,865 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:52:54,867 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:52:54,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:52:54,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:52:54,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:52:54,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:52:54" (1/1) ... [2020-10-13 14:52:54,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22c20ff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:52:54, skipping insertion in model container [2020-10-13 14:52:54,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:52:54" (1/1) ... [2020-10-13 14:52:54,883 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:52:54,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:52:55,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:52:55,258 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:52:55,472 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:52:55,492 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:52:55,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:52:55 WrapperNode [2020-10-13 14:52:55,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:52:55,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:52:55,494 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:52:55,494 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:52:55,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:52:55" (1/1) ... [2020-10-13 14:52:55,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:52:55" (1/1) ... [2020-10-13 14:52:55,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:52:55" (1/1) ... [2020-10-13 14:52:55,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:52:55" (1/1) ... [2020-10-13 14:52:55,536 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:52:55" (1/1) ... [2020-10-13 14:52:55,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:52:55" (1/1) ... [2020-10-13 14:52:55,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:52:55" (1/1) ... [2020-10-13 14:52:55,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:52:55,556 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:52:55,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:52:55,557 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:52:55,558 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:52:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-13 14:52:55,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:52:55,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:52:55,613 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:52:55,613 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:52:55,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:52:55,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:52:55,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:52:55,614 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:52:55,614 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:52:55,614 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:52:55,620 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:52:55,620 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:52:55,620 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:52:55,621 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:52:55,621 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:52:55,621 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 14:52:55,622 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-13 14:52:55,622 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-13 14:52:55,622 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:52:55,622 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:52:55,622 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:52:55,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:52:55,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:52:56,369 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:52:56,369 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:52:56,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:52:56 BoogieIcfgContainer [2020-10-13 14:52:56,375 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:52:56,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:52:56,377 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:52:56,380 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:52:56,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:52:54" (1/3) ... [2020-10-13 14:52:56,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2853412 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:52:56, skipping insertion in model container [2020-10-13 14:52:56,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:52:55" (2/3) ... [2020-10-13 14:52:56,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2853412 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:52:56, skipping insertion in model container [2020-10-13 14:52:56,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:52:56" (3/3) ... [2020-10-13 14:52:56,384 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-13 14:52:56,395 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:52:56,403 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:52:56,418 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:52:56,444 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:52:56,444 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:52:56,444 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:52:56,445 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:52:56,445 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:52:56,445 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:52:56,445 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:52:56,445 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:52:56,472 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states. [2020-10-13 14:52:56,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 14:52:56,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:52:56,485 INFO L422 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] [2020-10-13 14:52:56,485 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:52:56,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:52:56,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1068794681, now seen corresponding path program 1 times [2020-10-13 14:52:56,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:52:56,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504357954] [2020-10-13 14:52:56,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:52:56,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:52:57,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:57,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:57,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:57,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:57,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:59,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:59,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:01,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:01,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 14:53:01,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:53:01,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 14:53:01,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:01,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:53:01,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 14:53:01,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 14:53:01,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 14:53:02,245 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:53:02,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:53:02,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:02,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:02,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:02,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:53:02,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:53:02,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 14:53:02,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:02,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:53:02,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:53:02,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:53:02,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:53:02,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:53:02,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504357954] [2020-10-13 14:53:02,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:53:02,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:53:02,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88172566] [2020-10-13 14:53:02,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:53:02,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:53:02,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:53:02,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:53:02,343 INFO L87 Difference]: Start difference. First operand 168 states. Second operand 4 states. [2020-10-13 14:53:02,680 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-13 14:53:03,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:53:03,658 INFO L93 Difference]: Finished difference Result 392 states and 634 transitions. [2020-10-13 14:53:03,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:53:03,660 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-10-13 14:53:03,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:53:03,677 INFO L225 Difference]: With dead ends: 392 [2020-10-13 14:53:03,677 INFO L226 Difference]: Without dead ends: 264 [2020-10-13 14:53:03,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:53:03,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-13 14:53:03,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 262. [2020-10-13 14:53:03,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-13 14:53:03,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 390 transitions. [2020-10-13 14:53:03,765 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 390 transitions. Word has length 77 [2020-10-13 14:53:03,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:53:03,766 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 390 transitions. [2020-10-13 14:53:03,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:53:03,766 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 390 transitions. [2020-10-13 14:53:03,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 14:53:03,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:53:03,769 INFO L422 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] [2020-10-13 14:53:03,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:53:03,770 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:53:03,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:53:03,771 INFO L82 PathProgramCache]: Analyzing trace with hash 234376323, now seen corresponding path program 1 times [2020-10-13 14:53:03,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:53:03,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538917798] [2020-10-13 14:53:03,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:53:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:03,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:03,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:03,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:04,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:04,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:04,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:08,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:08,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 14:53:08,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:53:08,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 14:53:08,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:08,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:53:08,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 14:53:08,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 14:53:08,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:53:09,087 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:53:09,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:53:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:09,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:09,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:09,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:53:09,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:53:09,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:53:09,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:09,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:53:09,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:53:09,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:53:09,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:53:09,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:53:09,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538917798] [2020-10-13 14:53:09,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:53:09,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:53:09,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50115802] [2020-10-13 14:53:09,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:53:09,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:53:09,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:53:09,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:53:09,136 INFO L87 Difference]: Start difference. First operand 262 states and 390 transitions. Second operand 4 states. [2020-10-13 14:53:09,403 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-13 14:53:10,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:53:10,360 INFO L93 Difference]: Finished difference Result 658 states and 1022 transitions. [2020-10-13 14:53:10,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:53:10,362 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-10-13 14:53:10,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:53:10,368 INFO L225 Difference]: With dead ends: 658 [2020-10-13 14:53:10,369 INFO L226 Difference]: Without dead ends: 444 [2020-10-13 14:53:10,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:53:10,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2020-10-13 14:53:10,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 442. [2020-10-13 14:53:10,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2020-10-13 14:53:10,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 677 transitions. [2020-10-13 14:53:10,433 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 677 transitions. Word has length 78 [2020-10-13 14:53:10,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:53:10,435 INFO L479 AbstractCegarLoop]: Abstraction has 442 states and 677 transitions. [2020-10-13 14:53:10,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:53:10,436 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 677 transitions. [2020-10-13 14:53:10,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 14:53:10,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:53:10,441 INFO L422 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] [2020-10-13 14:53:10,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:53:10,445 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:53:10,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:53:10,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1964888071, now seen corresponding path program 1 times [2020-10-13 14:53:10,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:53:10,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200281103] [2020-10-13 14:53:10,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:53:10,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:10,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:10,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:10,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:10,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:10,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:13,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:13,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 14:53:13,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:53:13,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2701 [2020-10-13 14:53:13,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:13,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:53:13,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 14:53:13,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 14:53:13,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:53:13,397 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:53:13,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:53:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:13,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:13,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:13,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:53:13,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:53:13,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 14:53:13,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:13,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:53:13,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:53:13,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:53:13,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:53:13,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:53:13,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200281103] [2020-10-13 14:53:13,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:53:13,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:53:13,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287499233] [2020-10-13 14:53:13,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:53:13,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:53:13,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:53:13,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:53:13,442 INFO L87 Difference]: Start difference. First operand 442 states and 677 transitions. Second operand 4 states. [2020-10-13 14:53:13,640 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-13 14:53:14,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:53:14,484 INFO L93 Difference]: Finished difference Result 1166 states and 1831 transitions. [2020-10-13 14:53:14,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:53:14,485 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-13 14:53:14,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:53:14,490 INFO L225 Difference]: With dead ends: 1166 [2020-10-13 14:53:14,490 INFO L226 Difference]: Without dead ends: 772 [2020-10-13 14:53:14,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:53:14,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2020-10-13 14:53:14,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 770. [2020-10-13 14:53:14,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 770 states. [2020-10-13 14:53:14,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1197 transitions. [2020-10-13 14:53:14,544 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1197 transitions. Word has length 79 [2020-10-13 14:53:14,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:53:14,545 INFO L479 AbstractCegarLoop]: Abstraction has 770 states and 1197 transitions. [2020-10-13 14:53:14,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:53:14,545 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1197 transitions. [2020-10-13 14:53:14,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 14:53:14,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:53:14,547 INFO L422 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] [2020-10-13 14:53:14,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:53:14,548 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:53:14,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:53:14,548 INFO L82 PathProgramCache]: Analyzing trace with hash 220950999, now seen corresponding path program 1 times [2020-10-13 14:53:14,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:53:14,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950212154] [2020-10-13 14:53:14,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:53:14,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:14,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:14,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:14,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:14,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:16,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:16,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 14:53:16,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:53:16,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1632 [2020-10-13 14:53:16,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:16,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:53:16,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 14:53:16,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 14:53:16,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 14:53:16,420 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:53:16,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:53:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:16,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:16,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:16,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:53:16,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:53:16,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:53:16,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:16,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:53:16,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:53:16,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:53:16,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:53:16,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:53:16,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950212154] [2020-10-13 14:53:16,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:53:16,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:53:16,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460105143] [2020-10-13 14:53:16,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:53:16,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:53:16,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:53:16,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:53:16,464 INFO L87 Difference]: Start difference. First operand 770 states and 1197 transitions. Second operand 4 states. [2020-10-13 14:53:16,658 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-13 14:53:17,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:53:17,580 INFO L93 Difference]: Finished difference Result 2086 states and 3287 transitions. [2020-10-13 14:53:17,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:53:17,581 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-13 14:53:17,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:53:17,589 INFO L225 Difference]: With dead ends: 2086 [2020-10-13 14:53:17,589 INFO L226 Difference]: Without dead ends: 1364 [2020-10-13 14:53:17,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:53:17,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2020-10-13 14:53:17,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1362. [2020-10-13 14:53:17,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1362 states. [2020-10-13 14:53:17,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 2129 transitions. [2020-10-13 14:53:17,656 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 2129 transitions. Word has length 80 [2020-10-13 14:53:17,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:53:17,657 INFO L479 AbstractCegarLoop]: Abstraction has 1362 states and 2129 transitions. [2020-10-13 14:53:17,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:53:17,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 2129 transitions. [2020-10-13 14:53:17,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 14:53:17,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:53:17,658 INFO L422 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] [2020-10-13 14:53:17,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:53:17,659 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:53:17,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:53:17,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1512879950, now seen corresponding path program 1 times [2020-10-13 14:53:17,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:53:17,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059380677] [2020-10-13 14:53:17,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:53:17,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:17,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:17,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:17,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:18,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:18,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 14:53:18,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:53:18,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 775 [2020-10-13 14:53:18,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:18,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:53:18,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 14:53:18,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 14:53:18,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:53:18,658 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:53:18,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:53:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:18,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:18,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:18,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:53:18,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:53:18,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 14:53:18,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:18,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:53:18,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:53:18,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:53:18,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:53:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:53:18,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059380677] [2020-10-13 14:53:18,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:53:18,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:53:18,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981749555] [2020-10-13 14:53:18,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:53:18,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:53:18,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:53:18,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:53:18,699 INFO L87 Difference]: Start difference. First operand 1362 states and 2129 transitions. Second operand 4 states. [2020-10-13 14:53:18,907 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-13 14:53:19,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:53:19,805 INFO L93 Difference]: Finished difference Result 3734 states and 5875 transitions. [2020-10-13 14:53:19,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:53:19,806 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-13 14:53:19,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:53:19,820 INFO L225 Difference]: With dead ends: 3734 [2020-10-13 14:53:19,820 INFO L226 Difference]: Without dead ends: 2420 [2020-10-13 14:53:19,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:53:19,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2020-10-13 14:53:19,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 2418. [2020-10-13 14:53:19,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2418 states. [2020-10-13 14:53:19,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 3777 transitions. [2020-10-13 14:53:19,964 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 3777 transitions. Word has length 81 [2020-10-13 14:53:19,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:53:19,966 INFO L479 AbstractCegarLoop]: Abstraction has 2418 states and 3777 transitions. [2020-10-13 14:53:19,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:53:19,966 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 3777 transitions. [2020-10-13 14:53:19,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 14:53:19,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:53:19,968 INFO L422 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] [2020-10-13 14:53:19,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:53:19,968 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:53:19,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:53:19,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1117664467, now seen corresponding path program 1 times [2020-10-13 14:53:19,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:53:19,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029364271] [2020-10-13 14:53:19,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:53:19,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:20,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:20,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:20,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:20,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 14:53:20,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:53:20,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 415 [2020-10-13 14:53:20,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:20,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:53:20,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 14:53:20,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 14:53:20,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:53:20,611 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:53:20,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:53:20,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:20,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:20,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:20,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:53:20,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:53:20,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:53:20,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:20,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:53:20,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:53:20,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:53:20,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:53:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:53:20,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029364271] [2020-10-13 14:53:20,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:53:20,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:53:20,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777744938] [2020-10-13 14:53:20,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:53:20,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:53:20,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:53:20,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:53:20,649 INFO L87 Difference]: Start difference. First operand 2418 states and 3777 transitions. Second operand 4 states. [2020-10-13 14:53:20,841 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-13 14:53:21,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:53:21,706 INFO L93 Difference]: Finished difference Result 6646 states and 10403 transitions. [2020-10-13 14:53:21,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:53:21,706 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-13 14:53:21,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:53:21,729 INFO L225 Difference]: With dead ends: 6646 [2020-10-13 14:53:21,730 INFO L226 Difference]: Without dead ends: 4276 [2020-10-13 14:53:21,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:53:21,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4276 states. [2020-10-13 14:53:21,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4276 to 4274. [2020-10-13 14:53:21,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4274 states. [2020-10-13 14:53:21,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4274 states to 4274 states and 6641 transitions. [2020-10-13 14:53:21,993 INFO L78 Accepts]: Start accepts. Automaton has 4274 states and 6641 transitions. Word has length 82 [2020-10-13 14:53:21,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:53:21,993 INFO L479 AbstractCegarLoop]: Abstraction has 4274 states and 6641 transitions. [2020-10-13 14:53:21,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:53:21,993 INFO L276 IsEmpty]: Start isEmpty. Operand 4274 states and 6641 transitions. [2020-10-13 14:53:21,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 14:53:21,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:53:21,995 INFO L422 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] [2020-10-13 14:53:21,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:53:21,996 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:53:21,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:53:21,996 INFO L82 PathProgramCache]: Analyzing trace with hash 363991160, now seen corresponding path program 1 times [2020-10-13 14:53:21,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:53:21,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107953874] [2020-10-13 14:53:21,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:53:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:22,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:22,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:23,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:23,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 14:53:23,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:53:23,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1148 [2020-10-13 14:53:23,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:23,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:53:23,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:53:23,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-13 14:53:23,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:53:23,486 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:53:23,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:53:23,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:23,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:23,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:23,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:53:23,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:53:23,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:53:23,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:23,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:53:23,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:53:23,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:53:23,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:53:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:53:23,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107953874] [2020-10-13 14:53:23,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:53:23,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:53:23,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058846341] [2020-10-13 14:53:23,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:53:23,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:53:23,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:53:23,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:53:23,737 INFO L87 Difference]: Start difference. First operand 4274 states and 6641 transitions. Second operand 9 states. [2020-10-13 14:53:27,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:53:27,156 INFO L93 Difference]: Finished difference Result 25790 states and 39863 transitions. [2020-10-13 14:53:27,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 14:53:27,157 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-10-13 14:53:27,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:53:27,244 INFO L225 Difference]: With dead ends: 25790 [2020-10-13 14:53:27,244 INFO L226 Difference]: Without dead ends: 21564 [2020-10-13 14:53:27,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:53:27,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21564 states. [2020-10-13 14:53:28,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21564 to 21554. [2020-10-13 14:53:28,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21554 states. [2020-10-13 14:53:28,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21554 states to 21554 states and 33201 transitions. [2020-10-13 14:53:28,390 INFO L78 Accepts]: Start accepts. Automaton has 21554 states and 33201 transitions. Word has length 83 [2020-10-13 14:53:28,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:53:28,390 INFO L479 AbstractCegarLoop]: Abstraction has 21554 states and 33201 transitions. [2020-10-13 14:53:28,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:53:28,391 INFO L276 IsEmpty]: Start isEmpty. Operand 21554 states and 33201 transitions. [2020-10-13 14:53:28,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 14:53:28,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:53:28,392 INFO L422 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] [2020-10-13 14:53:28,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:53:28,392 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:53:28,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:53:28,392 INFO L82 PathProgramCache]: Analyzing trace with hash -487977183, now seen corresponding path program 1 times [2020-10-13 14:53:28,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:53:28,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713114388] [2020-10-13 14:53:28,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:53:28,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:28,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:28,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:29,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:29,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 14:53:29,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:53:29,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 741 [2020-10-13 14:53:29,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:29,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:53:29,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:53:29,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 14:53:29,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:53:29,475 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:53:29,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:53:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:29,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:29,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:29,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:53:29,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:53:29,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-13 14:53:29,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:29,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:53:29,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:53:29,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:53:29,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:53:29,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:53:29,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713114388] [2020-10-13 14:53:29,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:53:29,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:53:29,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199757104] [2020-10-13 14:53:29,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:53:29,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:53:29,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:53:29,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:53:29,573 INFO L87 Difference]: Start difference. First operand 21554 states and 33201 transitions. Second operand 6 states. [2020-10-13 14:53:29,783 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-13 14:53:32,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:53:32,527 INFO L93 Difference]: Finished difference Result 64214 states and 98803 transitions. [2020-10-13 14:53:32,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:53:32,528 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 85 [2020-10-13 14:53:32,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:53:32,632 INFO L225 Difference]: With dead ends: 64214 [2020-10-13 14:53:32,632 INFO L226 Difference]: Without dead ends: 42708 [2020-10-13 14:53:32,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:53:32,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42708 states. [2020-10-13 14:53:34,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42708 to 42706. [2020-10-13 14:53:34,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42706 states. [2020-10-13 14:53:34,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42706 states to 42706 states and 65297 transitions. [2020-10-13 14:53:34,880 INFO L78 Accepts]: Start accepts. Automaton has 42706 states and 65297 transitions. Word has length 85 [2020-10-13 14:53:34,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:53:34,880 INFO L479 AbstractCegarLoop]: Abstraction has 42706 states and 65297 transitions. [2020-10-13 14:53:34,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:53:34,880 INFO L276 IsEmpty]: Start isEmpty. Operand 42706 states and 65297 transitions. [2020-10-13 14:53:34,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 14:53:34,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:53:34,882 INFO L422 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] [2020-10-13 14:53:34,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:53:34,882 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:53:34,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:53:34,882 INFO L82 PathProgramCache]: Analyzing trace with hash -644925050, now seen corresponding path program 1 times [2020-10-13 14:53:34,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:53:34,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495048070] [2020-10-13 14:53:34,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:53:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:34,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:35,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:35,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 14:53:35,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:53:35,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 297 [2020-10-13 14:53:35,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:35,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:53:35,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 14:53:35,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-13 14:53:35,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:53:35,523 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:53:35,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:53:35,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:35,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:35,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:35,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:53:35,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:53:35,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:53:35,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:35,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:53:35,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:53:35,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:53:35,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:53:35,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:53:35,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495048070] [2020-10-13 14:53:35,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:53:35,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:53:35,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927897366] [2020-10-13 14:53:35,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:53:35,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:53:35,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:53:35,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:53:35,587 INFO L87 Difference]: Start difference. First operand 42706 states and 65297 transitions. Second operand 9 states. [2020-10-13 14:53:35,856 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-13 14:53:44,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:53:44,604 INFO L93 Difference]: Finished difference Result 241312 states and 369560 transitions. [2020-10-13 14:53:44,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 14:53:44,605 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 85 [2020-10-13 14:53:44,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:53:45,058 INFO L225 Difference]: With dead ends: 241312 [2020-10-13 14:53:45,058 INFO L226 Difference]: Without dead ends: 198654 [2020-10-13 14:53:45,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-13 14:53:45,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198654 states. [2020-10-13 14:53:51,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198654 to 85362. [2020-10-13 14:53:51,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85362 states. [2020-10-13 14:53:51,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85362 states to 85362 states and 129009 transitions. [2020-10-13 14:53:51,519 INFO L78 Accepts]: Start accepts. Automaton has 85362 states and 129009 transitions. Word has length 85 [2020-10-13 14:53:51,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:53:51,519 INFO L479 AbstractCegarLoop]: Abstraction has 85362 states and 129009 transitions. [2020-10-13 14:53:51,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:53:51,520 INFO L276 IsEmpty]: Start isEmpty. Operand 85362 states and 129009 transitions. [2020-10-13 14:53:51,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 14:53:51,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:53:51,521 INFO L422 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] [2020-10-13 14:53:51,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:53:51,521 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:53:51,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:53:51,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1463627260, now seen corresponding path program 1 times [2020-10-13 14:53:51,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:53:51,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918240286] [2020-10-13 14:53:51,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:53:51,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:51,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:51,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:51,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 14:53:51,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:53:51,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-13 14:53:51,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:51,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:53:51,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-13 14:53:51,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:53:51,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:53:51,915 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:53:51,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:53:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:51,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:51,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:51,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:53:51,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:53:51,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:53:51,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:51,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:53:51,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:53:51,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:53:51,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:53:51,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:53:51,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918240286] [2020-10-13 14:53:51,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:53:51,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:53:51,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079386388] [2020-10-13 14:53:51,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:53:51,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:53:51,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:53:51,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:53:51,945 INFO L87 Difference]: Start difference. First operand 85362 states and 129009 transitions. Second operand 5 states. [2020-10-13 14:54:01,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:54:01,791 INFO L93 Difference]: Finished difference Result 173748 states and 261042 transitions. [2020-10-13 14:54:01,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:54:01,791 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 86 [2020-10-13 14:54:01,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:54:02,017 INFO L225 Difference]: With dead ends: 173748 [2020-10-13 14:54:02,018 INFO L226 Difference]: Without dead ends: 173746 [2020-10-13 14:54:02,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:54:02,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173746 states. [2020-10-13 14:54:07,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173746 to 88434. [2020-10-13 14:54:07,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88434 states. [2020-10-13 14:54:07,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88434 states to 88434 states and 132081 transitions. [2020-10-13 14:54:07,644 INFO L78 Accepts]: Start accepts. Automaton has 88434 states and 132081 transitions. Word has length 86 [2020-10-13 14:54:07,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:54:07,644 INFO L479 AbstractCegarLoop]: Abstraction has 88434 states and 132081 transitions. [2020-10-13 14:54:07,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:54:07,645 INFO L276 IsEmpty]: Start isEmpty. Operand 88434 states and 132081 transitions. [2020-10-13 14:54:07,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 14:54:07,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:54:07,646 INFO L422 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] [2020-10-13 14:54:07,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:54:07,647 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:54:07,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:54:07,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1862575371, now seen corresponding path program 1 times [2020-10-13 14:54:07,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:54:07,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238414190] [2020-10-13 14:54:07,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:54:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:07,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:07,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:07,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 14:54:07,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:54:07,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-13 14:54:07,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:07,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:54:07,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 14:54:07,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 14:54:07,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:54:07,993 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:54:07,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:54:07,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:08,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:08,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:08,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:54:08,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:54:08,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 14:54:08,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:08,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:54:08,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:54:08,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:54:08,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:54:08,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:54:08,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238414190] [2020-10-13 14:54:08,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:54:08,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:54:08,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840465577] [2020-10-13 14:54:08,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:54:08,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:54:08,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:54:08,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:54:08,051 INFO L87 Difference]: Start difference. First operand 88434 states and 132081 transitions. Second operand 4 states. [2020-10-13 14:54:08,321 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-13 14:54:16,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:54:16,691 INFO L93 Difference]: Finished difference Result 197720 states and 294917 transitions. [2020-10-13 14:54:16,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:54:16,691 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2020-10-13 14:54:16,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:54:16,827 INFO L225 Difference]: With dead ends: 197720 [2020-10-13 14:54:16,828 INFO L226 Difference]: Without dead ends: 109334 [2020-10-13 14:54:16,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:54:16,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109334 states. [2020-10-13 14:54:23,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109334 to 109332. [2020-10-13 14:54:23,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109332 states. [2020-10-13 14:54:23,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109332 states to 109332 states and 162531 transitions. [2020-10-13 14:54:23,273 INFO L78 Accepts]: Start accepts. Automaton has 109332 states and 162531 transitions. Word has length 87 [2020-10-13 14:54:23,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:54:23,273 INFO L479 AbstractCegarLoop]: Abstraction has 109332 states and 162531 transitions. [2020-10-13 14:54:23,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:54:23,273 INFO L276 IsEmpty]: Start isEmpty. Operand 109332 states and 162531 transitions. [2020-10-13 14:54:23,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 14:54:23,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:54:23,317 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:54:23,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:54:23,318 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:54:23,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:54:23,318 INFO L82 PathProgramCache]: Analyzing trace with hash -173884417, now seen corresponding path program 1 times [2020-10-13 14:54:23,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:54:23,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029324371] [2020-10-13 14:54:23,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:54:23,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:23,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:23,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:23,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:25,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:25,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-13 14:54:25,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:54:25,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1811 [2020-10-13 14:54:25,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:25,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:54:25,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:54:25,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-13 14:54:25,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:54:25,494 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:54:25,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:54:25,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:25,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:25,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:25,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:54:25,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:54:25,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:54:25,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:25,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:54:25,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:54:25,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:54:25,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:54:25,544 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:54:25,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029324371] [2020-10-13 14:54:25,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:54:25,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 14:54:25,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503990762] [2020-10-13 14:54:25,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:54:25,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:54:25,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:54:25,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:54:25,547 INFO L87 Difference]: Start difference. First operand 109332 states and 162531 transitions. Second operand 9 states. [2020-10-13 14:54:25,781 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-13 14:55:18,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:55:18,515 INFO L93 Difference]: Finished difference Result 740846 states and 1093810 transitions. [2020-10-13 14:55:18,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 14:55:18,515 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 116 [2020-10-13 14:55:18,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:55:19,370 INFO L225 Difference]: With dead ends: 740846 [2020-10-13 14:55:19,370 INFO L226 Difference]: Without dead ends: 631564 [2020-10-13 14:55:19,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=241, Invalid=815, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 14:55:19,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631564 states. [2020-10-13 14:55:42,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631564 to 183940. [2020-10-13 14:55:42,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183940 states. [2020-10-13 14:55:42,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183940 states to 183940 states and 271603 transitions. [2020-10-13 14:55:42,768 INFO L78 Accepts]: Start accepts. Automaton has 183940 states and 271603 transitions. Word has length 116 [2020-10-13 14:55:42,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:55:42,768 INFO L479 AbstractCegarLoop]: Abstraction has 183940 states and 271603 transitions. [2020-10-13 14:55:42,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:55:42,769 INFO L276 IsEmpty]: Start isEmpty. Operand 183940 states and 271603 transitions. [2020-10-13 14:55:42,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 14:55:42,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:55:42,805 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:55:42,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:55:42,805 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:55:42,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:55:42,805 INFO L82 PathProgramCache]: Analyzing trace with hash -591605610, now seen corresponding path program 1 times [2020-10-13 14:55:42,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:55:42,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063717388] [2020-10-13 14:55:42,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:55:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:55:42,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:42,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:43,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:55:43,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-13 14:55:43,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:55:43,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 454 [2020-10-13 14:55:43,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:55:43,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:55:43,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:55:43,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 14:55:43,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:55:43,498 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:55:43,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:55:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:55:43,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:43,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:55:43,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:55:43,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:55:43,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-13 14:55:43,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:55:43,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:55:43,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:55:43,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:55:43,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:55:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-13 14:55:43,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063717388] [2020-10-13 14:55:43,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:55:43,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:55:43,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332414848] [2020-10-13 14:55:43,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:55:43,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:55:43,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:55:43,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:55:43,592 INFO L87 Difference]: Start difference. First operand 183940 states and 271603 transitions. Second operand 6 states. [2020-10-13 14:55:44,365 WARN L193 SmtUtils]: Spent 724.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-13 14:56:19,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:19,443 INFO L93 Difference]: Finished difference Result 551720 states and 814709 transitions. [2020-10-13 14:56:19,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:56:19,443 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 116 [2020-10-13 14:56:19,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:19,931 INFO L225 Difference]: With dead ends: 551720 [2020-10-13 14:56:19,932 INFO L226 Difference]: Without dead ends: 367830 [2020-10-13 14:56:20,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:56:20,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367830 states.