/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.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:18:31,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:18:31,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:18:31,773 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:18:31,773 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:18:31,774 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:18:31,776 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:18:31,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:18:31,779 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:18:31,780 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:18:31,781 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:18:31,782 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:18:31,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:18:31,783 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:18:31,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:18:31,785 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:18:31,786 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:18:31,787 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:18:31,788 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:18:31,790 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:18:31,791 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:18:31,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:18:31,793 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:18:31,794 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:18:31,797 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:18:31,797 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:18:31,797 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:18:31,798 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:18:31,798 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:18:31,799 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:18:31,799 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:18:31,800 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:18:31,801 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:18:31,801 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:18:31,802 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:18:31,803 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:18:31,803 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:18:31,803 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:18:31,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:18:31,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:18:31,805 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:18:31,806 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 14:18:31,828 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:18:31,828 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:18:31,829 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:18:31,829 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:18:31,829 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:18:31,830 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:18:31,830 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:18:31,830 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:18:31,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:18:31,831 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:18:31,831 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:18:31,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:18:31,831 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:18:31,831 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:18:31,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:18:31,832 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:18:31,833 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:18:31,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:18:31,834 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:18:31,834 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:18:31,834 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:18:31,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:18:31,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:18:31,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:18:31,835 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:18:31,835 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:18:31,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:18:31,836 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:18:31,836 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:18:31,836 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 14:18:32,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:18:32,141 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:18:32,150 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:18:32,152 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:18:32,154 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:18:32,154 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-13 14:18:32,213 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d66cb68a9/0b1df20133d44c04878e5bf5191e73d7/FLAGa184d6811 [2020-10-13 14:18:32,716 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:18:32,717 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-13 14:18:32,732 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d66cb68a9/0b1df20133d44c04878e5bf5191e73d7/FLAGa184d6811 [2020-10-13 14:18:33,037 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d66cb68a9/0b1df20133d44c04878e5bf5191e73d7 [2020-10-13 14:18:33,045 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:18:33,047 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:18:33,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:18:33,048 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:18:33,053 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:18:33,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:18:33" (1/1) ... [2020-10-13 14:18:33,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b1be01e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:18:33, skipping insertion in model container [2020-10-13 14:18:33,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:18:33" (1/1) ... [2020-10-13 14:18:33,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:18:33,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:18:33,382 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:18:33,394 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:18:33,550 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:18:33,576 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:18:33,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:18:33 WrapperNode [2020-10-13 14:18:33,577 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:18:33,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:18:33,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:18:33,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:18:33,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:18:33" (1/1) ... [2020-10-13 14:18:33,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:18:33" (1/1) ... [2020-10-13 14:18:33,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:18:33" (1/1) ... [2020-10-13 14:18:33,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:18:33" (1/1) ... [2020-10-13 14:18:33,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:18:33" (1/1) ... [2020-10-13 14:18:33,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:18:33" (1/1) ... [2020-10-13 14:18:33,629 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:18:33" (1/1) ... [2020-10-13 14:18:33,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:18:33,634 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:18:33,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:18:33,634 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:18:33,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:18:33" (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 14:18:33,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:18:33,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:18:33,703 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:18:33,703 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:18:33,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:18:33,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:18:33,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:18:33,706 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:18:33,706 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:18:33,706 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:18:33,706 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:18:33,706 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:18:33,706 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:18:33,706 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:18:33,707 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:18:33,707 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 14:18:33,707 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-13 14:18:33,707 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:18:33,707 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:18:33,707 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:18:33,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:18:33,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:18:34,343 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:18:34,344 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:18:34,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:18:34 BoogieIcfgContainer [2020-10-13 14:18:34,348 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:18:34,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:18:34,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:18:34,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:18:34,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:18:33" (1/3) ... [2020-10-13 14:18:34,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2646b1c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:18:34, skipping insertion in model container [2020-10-13 14:18:34,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:18:33" (2/3) ... [2020-10-13 14:18:34,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2646b1c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:18:34, skipping insertion in model container [2020-10-13 14:18:34,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:18:34" (3/3) ... [2020-10-13 14:18:34,357 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-13 14:18:34,367 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:18:34,374 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:18:34,388 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:18:34,412 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:18:34,412 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:18:34,412 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:18:34,413 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:18:34,413 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:18:34,413 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:18:34,413 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:18:34,413 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:18:34,434 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states. [2020-10-13 14:18:34,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 14:18:34,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:18:34,445 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] [2020-10-13 14:18:34,445 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:18:34,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:18:34,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1959120292, now seen corresponding path program 1 times [2020-10-13 14:18:34,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:18:34,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323260598] [2020-10-13 14:18:34,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:18:34,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:18:34,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:35,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:35,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:35,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:35,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:36,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:39,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:18:39,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 14:18:39,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:18:39,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:18:39,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:18:39,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:18:39,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 14:18:39,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 14:18:39,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 14:18:39,973 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:18:39,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:18:39,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:18:39,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:40,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:18:40,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:18:40,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:18:40,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 14:18:40,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:18:40,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:18:40,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:18:40,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:18:40,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:18:40,035 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 14:18:40,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323260598] [2020-10-13 14:18:40,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:18:40,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:18:40,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752644715] [2020-10-13 14:18:40,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:18:40,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:18:40,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:18:40,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:18:40,063 INFO L87 Difference]: Start difference. First operand 102 states. Second operand 4 states. [2020-10-13 14:18:40,333 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-13 14:18:41,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:18:41,141 INFO L93 Difference]: Finished difference Result 222 states and 357 transitions. [2020-10-13 14:18:41,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:18:41,144 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-10-13 14:18:41,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:18:41,158 INFO L225 Difference]: With dead ends: 222 [2020-10-13 14:18:41,158 INFO L226 Difference]: Without dead ends: 150 [2020-10-13 14:18:41,162 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 14:18:41,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-13 14:18:41,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-10-13 14:18:41,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-13 14:18:41,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 213 transitions. [2020-10-13 14:18:41,223 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 213 transitions. Word has length 63 [2020-10-13 14:18:41,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:18:41,223 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 213 transitions. [2020-10-13 14:18:41,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:18:41,224 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 213 transitions. [2020-10-13 14:18:41,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 14:18:41,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:18:41,226 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] [2020-10-13 14:18:41,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:18:41,227 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:18:41,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:18:41,227 INFO L82 PathProgramCache]: Analyzing trace with hash 495410469, now seen corresponding path program 1 times [2020-10-13 14:18:41,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:18:41,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951157422] [2020-10-13 14:18:41,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:18:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:18:41,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:41,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:41,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:41,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:41,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:42,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:46,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:18:46,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 14:18:46,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:18:46,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 14:18:46,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:18:46,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:18:46,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 14:18:46,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 14:18:46,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:18:46,461 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:18:46,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:18:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:18:46,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:46,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:18:46,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:18:46,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:18:46,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:18:46,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:18:46,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:18:46,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:18:46,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:18:46,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:18:46,494 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 14:18:46,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951157422] [2020-10-13 14:18:46,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:18:46,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:18:46,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874157901] [2020-10-13 14:18:46,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:18:46,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:18:46,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:18:46,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:18:46,498 INFO L87 Difference]: Start difference. First operand 148 states and 213 transitions. Second operand 4 states. [2020-10-13 14:18:46,671 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-13 14:18:47,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:18:47,138 INFO L93 Difference]: Finished difference Result 352 states and 537 transitions. [2020-10-13 14:18:47,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:18:47,139 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-13 14:18:47,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:18:47,142 INFO L225 Difference]: With dead ends: 352 [2020-10-13 14:18:47,142 INFO L226 Difference]: Without dead ends: 242 [2020-10-13 14:18:47,144 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 14:18:47,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-13 14:18:47,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 240. [2020-10-13 14:18:47,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-13 14:18:47,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 359 transitions. [2020-10-13 14:18:47,170 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 359 transitions. Word has length 64 [2020-10-13 14:18:47,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:18:47,170 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 359 transitions. [2020-10-13 14:18:47,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:18:47,171 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 359 transitions. [2020-10-13 14:18:47,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 14:18:47,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:18:47,173 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] [2020-10-13 14:18:47,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:18:47,173 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:18:47,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:18:47,174 INFO L82 PathProgramCache]: Analyzing trace with hash 68514516, now seen corresponding path program 1 times [2020-10-13 14:18:47,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:18:47,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142333830] [2020-10-13 14:18:47,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:18:47,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:18:47,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:47,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:47,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:47,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:47,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:51,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:18:51,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 14:18:51,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:18:51,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3916 [2020-10-13 14:18:51,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:18:51,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:18:51,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 14:18:51,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 14:18:51,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:18:51,351 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:18:51,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:18:51,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:18:51,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:51,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:18:51,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:18:51,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:18:51,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 14:18:51,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:18:51,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:18:51,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:18:51,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:18:51,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:18:51,399 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 14:18:51,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142333830] [2020-10-13 14:18:51,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:18:51,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:18:51,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259751593] [2020-10-13 14:18:51,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:18:51,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:18:51,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:18:51,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:18:51,402 INFO L87 Difference]: Start difference. First operand 240 states and 359 transitions. Second operand 4 states. [2020-10-13 14:18:51,580 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-13 14:18:51,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:18:51,992 INFO L93 Difference]: Finished difference Result 612 states and 949 transitions. [2020-10-13 14:18:51,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:18:51,993 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-13 14:18:51,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:18:51,996 INFO L225 Difference]: With dead ends: 612 [2020-10-13 14:18:51,996 INFO L226 Difference]: Without dead ends: 410 [2020-10-13 14:18:51,998 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 14:18:51,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-10-13 14:18:52,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 408. [2020-10-13 14:18:52,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-10-13 14:18:52,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 623 transitions. [2020-10-13 14:18:52,028 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 623 transitions. Word has length 65 [2020-10-13 14:18:52,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:18:52,028 INFO L479 AbstractCegarLoop]: Abstraction has 408 states and 623 transitions. [2020-10-13 14:18:52,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:18:52,029 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 623 transitions. [2020-10-13 14:18:52,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 14:18:52,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:18:52,031 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] [2020-10-13 14:18:52,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:18:52,031 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:18:52,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:18:52,031 INFO L82 PathProgramCache]: Analyzing trace with hash -388135933, now seen corresponding path program 1 times [2020-10-13 14:18:52,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:18:52,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15347965] [2020-10-13 14:18:52,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:18:52,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:18:52,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:52,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:52,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:52,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:52,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:53,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:57,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:18:57,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 14:18:57,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:18:57,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 14:18:57,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:18:57,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:18:57,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 14:18:57,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 14:18:57,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-13 14:18:57,234 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:18:57,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:18:57,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:18:57,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:57,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:18:57,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:18:57,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:18:57,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:18:57,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:18:57,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:18:57,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:18:57,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:18:57,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:18:57,261 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 14:18:57,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15347965] [2020-10-13 14:18:57,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:18:57,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:18:57,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138268668] [2020-10-13 14:18:57,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:18:57,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:18:57,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:18:57,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:18:57,264 INFO L87 Difference]: Start difference. First operand 408 states and 623 transitions. Second operand 4 states. [2020-10-13 14:18:57,411 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-13 14:18:57,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:18:57,915 INFO L93 Difference]: Finished difference Result 1084 states and 1689 transitions. [2020-10-13 14:18:57,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:18:57,918 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-13 14:18:57,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:18:57,922 INFO L225 Difference]: With dead ends: 1084 [2020-10-13 14:18:57,923 INFO L226 Difference]: Without dead ends: 714 [2020-10-13 14:18:57,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:18:57,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-10-13 14:18:57,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 712. [2020-10-13 14:18:57,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-10-13 14:18:57,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1095 transitions. [2020-10-13 14:18:57,968 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1095 transitions. Word has length 66 [2020-10-13 14:18:57,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:18:57,968 INFO L479 AbstractCegarLoop]: Abstraction has 712 states and 1095 transitions. [2020-10-13 14:18:57,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:18:57,969 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1095 transitions. [2020-10-13 14:18:57,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 14:18:57,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:18:57,970 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] [2020-10-13 14:18:57,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:18:57,971 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:18:57,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:18:57,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1826788575, now seen corresponding path program 1 times [2020-10-13 14:18:57,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:18:57,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136561760] [2020-10-13 14:18:57,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:18:57,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:18:58,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:58,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:58,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:58,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:58,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:58,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:18:58,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:01,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:03,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:19:03,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 14:19:03,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:19:03,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 14:19:03,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:19:03,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:19:03,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 14:19:03,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 14:19:03,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:19:03,215 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:19:03,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:19:03,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:19:03,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:03,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:19:03,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:19:03,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:19:03,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:19:03,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:19:03,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:19:03,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:19:03,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:19:03,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:19:03,257 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 14:19:03,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136561760] [2020-10-13 14:19:03,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:19:03,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:19:03,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476512084] [2020-10-13 14:19:03,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:19:03,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:19:03,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:19:03,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:19:03,261 INFO L87 Difference]: Start difference. First operand 712 states and 1095 transitions. Second operand 4 states. [2020-10-13 14:19:03,461 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-13 14:19:03,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:19:03,946 INFO L93 Difference]: Finished difference Result 1932 states and 3001 transitions. [2020-10-13 14:19:03,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:19:03,946 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-13 14:19:03,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:19:03,960 INFO L225 Difference]: With dead ends: 1932 [2020-10-13 14:19:03,960 INFO L226 Difference]: Without dead ends: 1258 [2020-10-13 14:19:03,963 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 14:19:03,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2020-10-13 14:19:04,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1256. [2020-10-13 14:19:04,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1256 states. [2020-10-13 14:19:04,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1927 transitions. [2020-10-13 14:19:04,049 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1927 transitions. Word has length 67 [2020-10-13 14:19:04,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:19:04,049 INFO L479 AbstractCegarLoop]: Abstraction has 1256 states and 1927 transitions. [2020-10-13 14:19:04,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:19:04,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1927 transitions. [2020-10-13 14:19:04,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 14:19:04,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:19:04,051 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] [2020-10-13 14:19:04,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:19:04,052 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:19:04,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:19:04,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1291716753, now seen corresponding path program 1 times [2020-10-13 14:19:04,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:19:04,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957826608] [2020-10-13 14:19:04,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:19:04,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:19:04,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:04,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:04,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:04,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:04,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:04,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:04,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:05,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:05,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:05,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:09,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:19:09,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 14:19:09,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:19:09,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 14:19:09,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:19:09,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:19:09,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 14:19:09,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 14:19:09,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:19:09,292 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:19:09,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:19:09,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:19:09,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:09,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:19:09,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:19:09,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:19:09,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 14:19:09,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:19:09,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:19:09,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:19:09,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:19:09,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:19:09,333 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 14:19:09,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957826608] [2020-10-13 14:19:09,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:19:09,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:19:09,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657110935] [2020-10-13 14:19:09,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:19:09,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:19:09,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:19:09,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:19:09,336 INFO L87 Difference]: Start difference. First operand 1256 states and 1927 transitions. Second operand 7 states. [2020-10-13 14:19:09,583 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-13 14:19:10,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:19:10,969 INFO L93 Difference]: Finished difference Result 10952 states and 16943 transitions. [2020-10-13 14:19:10,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:19:10,970 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-13 14:19:10,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:19:11,038 INFO L225 Difference]: With dead ends: 10952 [2020-10-13 14:19:11,039 INFO L226 Difference]: Without dead ends: 9734 [2020-10-13 14:19:11,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:19:11,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9734 states. [2020-10-13 14:19:11,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9734 to 3656. [2020-10-13 14:19:11,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3656 states. [2020-10-13 14:19:11,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3656 states to 3656 states and 5623 transitions. [2020-10-13 14:19:11,387 INFO L78 Accepts]: Start accepts. Automaton has 3656 states and 5623 transitions. Word has length 68 [2020-10-13 14:19:11,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:19:11,389 INFO L479 AbstractCegarLoop]: Abstraction has 3656 states and 5623 transitions. [2020-10-13 14:19:11,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:19:11,389 INFO L276 IsEmpty]: Start isEmpty. Operand 3656 states and 5623 transitions. [2020-10-13 14:19:11,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 14:19:11,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:19:11,392 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] [2020-10-13 14:19:11,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:19:11,392 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:19:11,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:19:11,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1556220948, now seen corresponding path program 1 times [2020-10-13 14:19:11,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:19:11,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354283714] [2020-10-13 14:19:11,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:19:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:19:11,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:11,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:11,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:11,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:11,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:11,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:13,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:16,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:19:16,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 14:19:16,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:19:16,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 14:19:16,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:19:16,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:19:16,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 14:19:16,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 14:19:16,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:19:16,638 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:19:16,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:19:16,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:19:16,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:16,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:19:16,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:19:16,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:19:16,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 14:19:16,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:19:16,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:19:16,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:19:16,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:19:16,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:19:16,681 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 14:19:16,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354283714] [2020-10-13 14:19:16,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:19:16,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:19:16,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586697590] [2020-10-13 14:19:16,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:19:16,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:19:16,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:19:16,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:19:16,685 INFO L87 Difference]: Start difference. First operand 3656 states and 5623 transitions. Second operand 7 states. [2020-10-13 14:19:16,917 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-13 14:19:18,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:19:18,828 INFO L93 Difference]: Finished difference Result 32456 states and 50015 transitions. [2020-10-13 14:19:18,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:19:18,829 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-13 14:19:18,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:19:18,933 INFO L225 Difference]: With dead ends: 32456 [2020-10-13 14:19:18,933 INFO L226 Difference]: Without dead ends: 28838 [2020-10-13 14:19:18,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:19:18,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28838 states. [2020-10-13 14:19:19,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28838 to 10792. [2020-10-13 14:19:19,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10792 states. [2020-10-13 14:19:19,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10792 states to 10792 states and 16551 transitions. [2020-10-13 14:19:19,701 INFO L78 Accepts]: Start accepts. Automaton has 10792 states and 16551 transitions. Word has length 68 [2020-10-13 14:19:19,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:19:19,702 INFO L479 AbstractCegarLoop]: Abstraction has 10792 states and 16551 transitions. [2020-10-13 14:19:19,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:19:19,702 INFO L276 IsEmpty]: Start isEmpty. Operand 10792 states and 16551 transitions. [2020-10-13 14:19:19,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 14:19:19,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:19:19,713 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] [2020-10-13 14:19:19,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:19:19,714 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:19:19,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:19:19,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1464878343, now seen corresponding path program 1 times [2020-10-13 14:19:19,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:19:19,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524872406] [2020-10-13 14:19:19,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:19:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:19:19,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:19,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:19,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:20,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:21,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:19:21,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 14:19:21,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:19:21,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1374 [2020-10-13 14:19:21,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:19:21,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:19:21,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 14:19:21,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 14:19:21,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 41 [2020-10-13 14:19:21,322 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:19:21,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:19:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:19:21,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:21,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:19:21,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:19:21,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:19:21,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:19:21,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:19:21,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:19:21,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:19:21,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:19:21,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:19:21,352 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 14:19:21,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524872406] [2020-10-13 14:19:21,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:19:21,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:19:21,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029487393] [2020-10-13 14:19:21,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:19:21,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:19:21,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:19:21,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:19:21,361 INFO L87 Difference]: Start difference. First operand 10792 states and 16551 transitions. Second operand 7 states. [2020-10-13 14:19:21,541 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-13 14:19:24,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:19:24,222 INFO L93 Difference]: Finished difference Result 63282 states and 96945 transitions. [2020-10-13 14:19:24,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:19:24,223 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-13 14:19:24,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:19:24,359 INFO L225 Difference]: With dead ends: 63282 [2020-10-13 14:19:24,360 INFO L226 Difference]: Without dead ends: 56096 [2020-10-13 14:19:24,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:19:24,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56096 states. [2020-10-13 14:19:25,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56096 to 21426. [2020-10-13 14:19:25,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21426 states. [2020-10-13 14:19:25,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21426 states to 21426 states and 32665 transitions. [2020-10-13 14:19:25,598 INFO L78 Accepts]: Start accepts. Automaton has 21426 states and 32665 transitions. Word has length 68 [2020-10-13 14:19:25,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:19:25,599 INFO L479 AbstractCegarLoop]: Abstraction has 21426 states and 32665 transitions. [2020-10-13 14:19:25,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:19:25,599 INFO L276 IsEmpty]: Start isEmpty. Operand 21426 states and 32665 transitions. [2020-10-13 14:19:25,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 14:19:25,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:19:25,600 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] [2020-10-13 14:19:25,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:19:25,600 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:19:25,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:19:25,601 INFO L82 PathProgramCache]: Analyzing trace with hash -285809585, now seen corresponding path program 1 times [2020-10-13 14:19:25,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:19:25,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598907665] [2020-10-13 14:19:25,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:19:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:19:25,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:26,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:26,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:26,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:27,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:19:27,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 14:19:27,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:19:27,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1984 [2020-10-13 14:19:27,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:19:27,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:19:27,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:19:27,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 14:19:27,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:19:27,796 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:19:27,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:19:27,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:19:27,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:27,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:19:27,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:19:27,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:19:27,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 14:19:27,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:19:27,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:19:27,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:19:27,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:19:27,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:19:27,836 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 14:19:27,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598907665] [2020-10-13 14:19:27,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:19:27,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:19:27,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236786206] [2020-10-13 14:19:27,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:19:27,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:19:27,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:19:27,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:19:27,838 INFO L87 Difference]: Start difference. First operand 21426 states and 32665 transitions. Second operand 6 states. [2020-10-13 14:19:27,992 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-13 14:19:29,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:19:29,622 INFO L93 Difference]: Finished difference Result 40374 states and 61467 transitions. [2020-10-13 14:19:29,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:19:29,623 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-13 14:19:29,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:19:29,680 INFO L225 Difference]: With dead ends: 40374 [2020-10-13 14:19:29,680 INFO L226 Difference]: Without dead ends: 30836 [2020-10-13 14:19:29,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:19:29,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30836 states. [2020-10-13 14:19:30,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30836 to 19010. [2020-10-13 14:19:30,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19010 states. [2020-10-13 14:19:30,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19010 states to 19010 states and 28744 transitions. [2020-10-13 14:19:30,972 INFO L78 Accepts]: Start accepts. Automaton has 19010 states and 28744 transitions. Word has length 68 [2020-10-13 14:19:30,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:19:30,973 INFO L479 AbstractCegarLoop]: Abstraction has 19010 states and 28744 transitions. [2020-10-13 14:19:30,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:19:30,973 INFO L276 IsEmpty]: Start isEmpty. Operand 19010 states and 28744 transitions. [2020-10-13 14:19:30,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 14:19:30,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:19:30,973 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] [2020-10-13 14:19:30,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:19:30,974 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:19:30,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:19:30,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1481920305, now seen corresponding path program 1 times [2020-10-13 14:19:30,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:19:30,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527457172] [2020-10-13 14:19:30,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:19:30,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:19:31,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:31,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:31,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:31,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:32,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:19:32,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 14:19:32,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:19:32,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1333 [2020-10-13 14:19:32,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:19:32,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:19:32,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 14:19:32,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 14:19:32,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:19:32,481 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:19:32,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:19:32,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:19:32,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:32,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:19:32,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:19:32,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:19:32,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:19:32,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:19:32,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:19:32,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:19:32,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:19:32,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:19:32,507 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 14:19:32,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527457172] [2020-10-13 14:19:32,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:19:32,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:19:32,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371846348] [2020-10-13 14:19:32,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:19:32,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:19:32,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:19:32,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:19:32,509 INFO L87 Difference]: Start difference. First operand 19010 states and 28744 transitions. Second operand 7 states. [2020-10-13 14:19:32,662 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-13 14:19:37,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:19:37,125 INFO L93 Difference]: Finished difference Result 87378 states and 132176 transitions. [2020-10-13 14:19:37,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:19:37,126 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-13 14:19:37,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:19:37,222 INFO L225 Difference]: With dead ends: 87378 [2020-10-13 14:19:37,223 INFO L226 Difference]: Without dead ends: 68432 [2020-10-13 14:19:37,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:19:37,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68432 states. [2020-10-13 14:19:38,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68432 to 19005. [2020-10-13 14:19:38,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19005 states. [2020-10-13 14:19:38,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19005 states to 19005 states and 28738 transitions. [2020-10-13 14:19:38,985 INFO L78 Accepts]: Start accepts. Automaton has 19005 states and 28738 transitions. Word has length 68 [2020-10-13 14:19:38,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:19:38,985 INFO L479 AbstractCegarLoop]: Abstraction has 19005 states and 28738 transitions. [2020-10-13 14:19:38,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:19:38,985 INFO L276 IsEmpty]: Start isEmpty. Operand 19005 states and 28738 transitions. [2020-10-13 14:19:38,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 14:19:38,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:19:38,986 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] [2020-10-13 14:19:38,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:19:38,986 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:19:38,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:19:38,987 INFO L82 PathProgramCache]: Analyzing trace with hash -302851547, now seen corresponding path program 1 times [2020-10-13 14:19:38,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:19:38,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673432716] [2020-10-13 14:19:38,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:19:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:19:39,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:39,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:39,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:39,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:40,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:19:40,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 14:19:40,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:19:40,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1181 [2020-10-13 14:19:40,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:19:40,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:19:40,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 14:19:40,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 14:19:40,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:19:40,332 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:19:40,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:19:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:19:40,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:40,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:19:40,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:19:40,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:19:40,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:19:40,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:19:40,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:19:40,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:19:40,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:19:40,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:19:40,355 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 14:19:40,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673432716] [2020-10-13 14:19:40,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:19:40,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:19:40,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79132104] [2020-10-13 14:19:40,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:19:40,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:19:40,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:19:40,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:19:40,358 INFO L87 Difference]: Start difference. First operand 19005 states and 28738 transitions. Second operand 7 states. [2020-10-13 14:19:40,514 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-13 14:19:45,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:19:45,474 INFO L93 Difference]: Finished difference Result 86837 states and 131396 transitions. [2020-10-13 14:19:45,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:19:45,475 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-13 14:19:45,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:19:45,557 INFO L225 Difference]: With dead ends: 86837 [2020-10-13 14:19:45,558 INFO L226 Difference]: Without dead ends: 67891 [2020-10-13 14:19:45,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:19:45,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67891 states. [2020-10-13 14:19:46,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67891 to 19005. [2020-10-13 14:19:46,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19005 states. [2020-10-13 14:19:47,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19005 states to 19005 states and 28738 transitions. [2020-10-13 14:19:47,024 INFO L78 Accepts]: Start accepts. Automaton has 19005 states and 28738 transitions. Word has length 68 [2020-10-13 14:19:47,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:19:47,024 INFO L479 AbstractCegarLoop]: Abstraction has 19005 states and 28738 transitions. [2020-10-13 14:19:47,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:19:47,024 INFO L276 IsEmpty]: Start isEmpty. Operand 19005 states and 28738 transitions. [2020-10-13 14:19:47,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 14:19:47,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:19:47,025 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] [2020-10-13 14:19:47,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:19:47,026 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:19:47,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:19:47,026 INFO L82 PathProgramCache]: Analyzing trace with hash 971016458, now seen corresponding path program 1 times [2020-10-13 14:19:47,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:19:47,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350635739] [2020-10-13 14:19:47,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:19:47,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:19:47,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:47,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:47,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:19:47,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 14:19:47,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:19:47,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 313 [2020-10-13 14:19:47,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:19:47,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:19:47,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:19:47,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 14:19:47,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:19:47,513 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:19:47,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:19:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:19:47,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:47,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:19:47,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:19:47,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:19:47,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:19:47,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:19:47,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:19:47,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:19:47,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:19:47,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:19:47,543 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 14:19:47,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350635739] [2020-10-13 14:19:47,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:19:47,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:19:47,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312323042] [2020-10-13 14:19:47,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:19:47,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:19:47,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:19:47,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:19:47,546 INFO L87 Difference]: Start difference. First operand 19005 states and 28738 transitions. Second operand 6 states. [2020-10-13 14:19:47,701 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-13 14:19:49,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:19:49,362 INFO L93 Difference]: Finished difference Result 37953 states and 57412 transitions. [2020-10-13 14:19:49,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:19:49,363 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-13 14:19:49,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:19:49,389 INFO L225 Difference]: With dead ends: 37953 [2020-10-13 14:19:49,389 INFO L226 Difference]: Without dead ends: 19007 [2020-10-13 14:19:49,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:19:49,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19007 states. [2020-10-13 14:19:51,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19007 to 19005. [2020-10-13 14:19:51,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19005 states. [2020-10-13 14:19:51,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19005 states to 19005 states and 28737 transitions. [2020-10-13 14:19:51,480 INFO L78 Accepts]: Start accepts. Automaton has 19005 states and 28737 transitions. Word has length 68 [2020-10-13 14:19:51,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:19:51,481 INFO L479 AbstractCegarLoop]: Abstraction has 19005 states and 28737 transitions. [2020-10-13 14:19:51,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:19:51,481 INFO L276 IsEmpty]: Start isEmpty. Operand 19005 states and 28737 transitions. [2020-10-13 14:19:51,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 14:19:51,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:19:51,481 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] [2020-10-13 14:19:51,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:19:51,482 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:19:51,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:19:51,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1366017396, now seen corresponding path program 1 times [2020-10-13 14:19:51,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:19:51,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653369788] [2020-10-13 14:19:51,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:19:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:19:51,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:51,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:51,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:19:51,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 14:19:51,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:19:51,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-13 14:19:51,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:19:51,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 14:19:51,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 14:19:51,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 14:19:51,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:19:51,982 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:19:51,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:19:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:19:51,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:51,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:19:51,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:19:51,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:19:51,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:19:51,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:19:51,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:19:51,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:19:51,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:19:51,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:19:52,001 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 14:19:52,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653369788] [2020-10-13 14:19:52,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:19:52,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 14:19:52,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832090191] [2020-10-13 14:19:52,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 14:19:52,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:19:52,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 14:19:52,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:19:52,003 INFO L87 Difference]: Start difference. First operand 19005 states and 28737 transitions. Second operand 8 states. [2020-10-13 14:19:52,181 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-13 14:20:06,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:20:06,445 INFO L93 Difference]: Finished difference Result 208465 states and 315467 transitions. [2020-10-13 14:20:06,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:20:06,446 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2020-10-13 14:20:06,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:20:06,674 INFO L225 Difference]: With dead ends: 208465 [2020-10-13 14:20:06,675 INFO L226 Difference]: Without dead ends: 189519 [2020-10-13 14:20:06,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-13 14:20:06,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189519 states. [2020-10-13 14:20:10,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189519 to 37949. [2020-10-13 14:20:10,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37949 states. [2020-10-13 14:20:10,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37949 states to 37949 states and 56385 transitions. [2020-10-13 14:20:10,591 INFO L78 Accepts]: Start accepts. Automaton has 37949 states and 56385 transitions. Word has length 68 [2020-10-13 14:20:10,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:20:10,591 INFO L479 AbstractCegarLoop]: Abstraction has 37949 states and 56385 transitions. [2020-10-13 14:20:10,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 14:20:10,591 INFO L276 IsEmpty]: Start isEmpty. Operand 37949 states and 56385 transitions. [2020-10-13 14:20:10,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 14:20:10,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:20:10,592 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] [2020-10-13 14:20:10,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:20:10,592 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:20:10,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:20:10,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1884500687, now seen corresponding path program 1 times [2020-10-13 14:20:10,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:20:10,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884583250] [2020-10-13 14:20:10,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:20:10,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:20:10,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:10,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:10,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:10,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:11,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:20:11,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 14:20:11,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:20:11,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 529 [2020-10-13 14:20:11,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:20:11,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:20:11,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-13 14:20:11,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:20:11,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:20:11,335 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:20:11,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:20:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:20:11,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:11,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:20:11,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:20:11,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:20:11,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:20:11,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:20:11,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:20:11,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:20:11,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:20:11,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:20:11,364 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 14:20:11,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884583250] [2020-10-13 14:20:11,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:20:11,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:20:11,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359148785] [2020-10-13 14:20:11,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:20:11,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:20:11,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:20:11,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:20:11,367 INFO L87 Difference]: Start difference. First operand 37949 states and 56385 transitions. Second operand 4 states. [2020-10-13 14:20:16,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:20:16,724 INFO L93 Difference]: Finished difference Result 95809 states and 141635 transitions. [2020-10-13 14:20:16,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:20:16,724 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-13 14:20:16,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:20:16,777 INFO L225 Difference]: With dead ends: 95809 [2020-10-13 14:20:16,778 INFO L226 Difference]: Without dead ends: 57919 [2020-10-13 14:20:16,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:20:16,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57919 states. [2020-10-13 14:20:22,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57919 to 57917. [2020-10-13 14:20:22,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57917 states. [2020-10-13 14:20:22,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57917 states to 57917 states and 83777 transitions. [2020-10-13 14:20:22,883 INFO L78 Accepts]: Start accepts. Automaton has 57917 states and 83777 transitions. Word has length 70 [2020-10-13 14:20:22,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:20:22,883 INFO L479 AbstractCegarLoop]: Abstraction has 57917 states and 83777 transitions. [2020-10-13 14:20:22,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:20:22,883 INFO L276 IsEmpty]: Start isEmpty. Operand 57917 states and 83777 transitions. [2020-10-13 14:20:22,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 14:20:22,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:20:22,884 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] [2020-10-13 14:20:22,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 14:20:22,884 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:20:22,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:20:22,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1904550030, now seen corresponding path program 1 times [2020-10-13 14:20:22,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:20:22,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710612293] [2020-10-13 14:20:22,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:20:22,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:20:22,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:22,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:23,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:20:23,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 14:20:23,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:20:23,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 649 [2020-10-13 14:20:23,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:20:23,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:20:23,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:20:23,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 14:20:23,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:20:23,711 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:20:23,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:20:23,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:20:23,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:23,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:20:23,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:20:23,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:20:23,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:20:23,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:20:23,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:20:23,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:20:23,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:20:23,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:20:23,738 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 14:20:23,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710612293] [2020-10-13 14:20:23,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:20:23,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:20:23,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063966688] [2020-10-13 14:20:23,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:20:23,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:20:23,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:20:23,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:20:23,740 INFO L87 Difference]: Start difference. First operand 57917 states and 83777 transitions. Second operand 6 states. [2020-10-13 14:20:23,895 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:20:28,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:20:28,358 INFO L93 Difference]: Finished difference Result 100831 states and 145506 transitions. [2020-10-13 14:20:28,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:20:28,359 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-13 14:20:28,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:20:28,398 INFO L225 Difference]: With dead ends: 100831 [2020-10-13 14:20:28,398 INFO L226 Difference]: Without dead ends: 42973 [2020-10-13 14:20:28,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:20:28,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42973 states. [2020-10-13 14:20:31,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42973 to 29160. [2020-10-13 14:20:31,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29160 states. [2020-10-13 14:20:31,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29160 states to 29160 states and 42087 transitions. [2020-10-13 14:20:31,749 INFO L78 Accepts]: Start accepts. Automaton has 29160 states and 42087 transitions. Word has length 70 [2020-10-13 14:20:31,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:20:31,749 INFO L479 AbstractCegarLoop]: Abstraction has 29160 states and 42087 transitions. [2020-10-13 14:20:31,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:20:31,749 INFO L276 IsEmpty]: Start isEmpty. Operand 29160 states and 42087 transitions. [2020-10-13 14:20:31,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 14:20:31,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:20:31,750 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] [2020-10-13 14:20:31,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 14:20:31,750 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:20:31,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:20:31,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1118260324, now seen corresponding path program 1 times [2020-10-13 14:20:31,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:20:31,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911397615] [2020-10-13 14:20:31,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:20:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:20:31,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:31,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:32,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:20:32,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 14:20:32,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:20:32,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 535 [2020-10-13 14:20:32,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:20:32,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 14:20:32,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 14:20:32,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 14:20:32,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:20:32,497 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:20:32,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:20:32,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:20:32,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:32,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:20:32,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:20:32,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:20:32,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:20:32,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:20:32,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:20:32,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:20:32,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:20:32,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:20:32,527 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 14:20:32,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911397615] [2020-10-13 14:20:32,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:20:32,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 14:20:32,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998056597] [2020-10-13 14:20:32,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 14:20:32,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:20:32,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 14:20:32,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:20:32,529 INFO L87 Difference]: Start difference. First operand 29160 states and 42087 transitions. Second operand 8 states. [2020-10-13 14:20:32,736 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-13 14:20:49,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:20:49,674 INFO L93 Difference]: Finished difference Result 174780 states and 252337 transitions. [2020-10-13 14:20:49,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:20:49,675 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-13 14:20:49,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:20:49,839 INFO L225 Difference]: With dead ends: 174780 [2020-10-13 14:20:49,839 INFO L226 Difference]: Without dead ends: 145658 [2020-10-13 14:20:49,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-13 14:20:49,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145658 states. [2020-10-13 14:20:54,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145658 to 29160. [2020-10-13 14:20:54,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29160 states. [2020-10-13 14:20:54,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29160 states to 29160 states and 41831 transitions. [2020-10-13 14:20:54,487 INFO L78 Accepts]: Start accepts. Automaton has 29160 states and 41831 transitions. Word has length 70 [2020-10-13 14:20:54,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:20:54,488 INFO L479 AbstractCegarLoop]: Abstraction has 29160 states and 41831 transitions. [2020-10-13 14:20:54,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 14:20:54,488 INFO L276 IsEmpty]: Start isEmpty. Operand 29160 states and 41831 transitions. [2020-10-13 14:20:54,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 14:20:54,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:20:54,488 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] [2020-10-13 14:20:54,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 14:20:54,489 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:20:54,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:20:54,489 INFO L82 PathProgramCache]: Analyzing trace with hash -305578189, now seen corresponding path program 1 times [2020-10-13 14:20:54,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:20:54,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920353017] [2020-10-13 14:20:54,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:20:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:20:54,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:54,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:54,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:54,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:20:54,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 14:20:54,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:20:54,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-10-13 14:20:54,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:20:54,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:20:54,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 14:20:54,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 14:20:54,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:20:54,887 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:20:54,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:20:54,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:20:54,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:54,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:20:54,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:20:54,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:20:54,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:20:54,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:20:54,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:20:54,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:20:54,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:20:54,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:20:54,917 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 14:20:54,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920353017] [2020-10-13 14:20:54,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:20:54,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:20:54,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120744727] [2020-10-13 14:20:54,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:20:54,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:20:54,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:20:54,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:20:54,919 INFO L87 Difference]: Start difference. First operand 29160 states and 41831 transitions. Second operand 4 states. [2020-10-13 14:20:55,051 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-13 14:21:00,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:21:00,152 INFO L93 Difference]: Finished difference Result 67438 states and 97003 transitions. [2020-10-13 14:21:00,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:21:00,153 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-13 14:21:00,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:21:00,191 INFO L225 Difference]: With dead ends: 67438 [2020-10-13 14:21:00,191 INFO L226 Difference]: Without dead ends: 38316 [2020-10-13 14:21:00,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:21:00,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38316 states. [2020-10-13 14:21:06,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38316 to 38314. [2020-10-13 14:21:06,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38314 states. [2020-10-13 14:21:06,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38314 states to 38314 states and 54825 transitions. [2020-10-13 14:21:06,169 INFO L78 Accepts]: Start accepts. Automaton has 38314 states and 54825 transitions. Word has length 71 [2020-10-13 14:21:06,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:21:06,170 INFO L479 AbstractCegarLoop]: Abstraction has 38314 states and 54825 transitions. [2020-10-13 14:21:06,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:21:06,170 INFO L276 IsEmpty]: Start isEmpty. Operand 38314 states and 54825 transitions. [2020-10-13 14:21:06,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 14:21:06,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:21:06,171 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] [2020-10-13 14:21:06,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 14:21:06,171 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:21:06,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:21:06,172 INFO L82 PathProgramCache]: Analyzing trace with hash 304422327, now seen corresponding path program 1 times [2020-10-13 14:21:06,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:21:06,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657745924] [2020-10-13 14:21:06,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:21:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:21:06,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:06,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:06,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:21:06,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 14:21:06,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:21:06,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-13 14:21:06,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:21:06,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:21:06,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-13 14:21:06,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:21:06,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:21:06,551 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:21:06,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:21:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:21:06,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:06,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:21:06,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:21:06,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:21:06,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:21:06,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:21:06,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:21:06,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:21:06,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:21:06,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:21:06,571 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 14:21:06,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657745924] [2020-10-13 14:21:06,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:21:06,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:21:06,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030611387] [2020-10-13 14:21:06,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:21:06,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:21:06,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:21:06,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:21:06,575 INFO L87 Difference]: Start difference. First operand 38314 states and 54825 transitions. Second operand 5 states. [2020-10-13 14:21:14,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:21:14,522 INFO L93 Difference]: Finished difference Result 58554 states and 83431 transitions. [2020-10-13 14:21:14,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:21:14,522 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-13 14:21:14,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:21:14,578 INFO L225 Difference]: With dead ends: 58554 [2020-10-13 14:21:14,578 INFO L226 Difference]: Without dead ends: 58552 [2020-10-13 14:21:14,589 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 14:21:14,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58552 states. [2020-10-13 14:21:19,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58552 to 38826. [2020-10-13 14:21:19,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38826 states. [2020-10-13 14:21:19,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38826 states to 38826 states and 54953 transitions. [2020-10-13 14:21:19,859 INFO L78 Accepts]: Start accepts. Automaton has 38826 states and 54953 transitions. Word has length 71 [2020-10-13 14:21:19,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:21:19,859 INFO L479 AbstractCegarLoop]: Abstraction has 38826 states and 54953 transitions. [2020-10-13 14:21:19,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:21:19,859 INFO L276 IsEmpty]: Start isEmpty. Operand 38826 states and 54953 transitions. [2020-10-13 14:21:19,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 14:21:19,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:21:19,870 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:21:19,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 14:21:19,870 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:21:19,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:21:19,871 INFO L82 PathProgramCache]: Analyzing trace with hash 822032438, now seen corresponding path program 1 times [2020-10-13 14:21:19,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:21:19,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773478526] [2020-10-13 14:21:19,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:21:19,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:21:19,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:19,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:19,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:20,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:20,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:20,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:20,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:20,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:21,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:21,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:21,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:21,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:22,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:22,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:22,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:22,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:22,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:23,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:23,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:23,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:23,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:24,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:24,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:24,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:24,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:21:24,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 14:21:24,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-13 14:21:24,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:21:24,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:21:24,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 14:21:24,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 14:21:24,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 14:21:24,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:21:25,119 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 15 [2020-10-13 14:21:25,297 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:21:25,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:21:25,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:21:25,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:25,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:21:25,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:21:25,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:21:25,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:21:25,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:21:25,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:21:25,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:21:25,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:21:25,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:21:25,325 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:21:25,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773478526] [2020-10-13 14:21:25,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:21:25,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 14:21:25,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288416202] [2020-10-13 14:21:25,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 14:21:25,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:21:25,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 14:21:25,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-13 14:21:25,327 INFO L87 Difference]: Start difference. First operand 38826 states and 54953 transitions. Second operand 11 states. [2020-10-13 14:21:25,520 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:21:37,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:21:37,874 INFO L93 Difference]: Finished difference Result 104706 states and 146333 transitions. [2020-10-13 14:21:37,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 14:21:37,874 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 97 [2020-10-13 14:21:37,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:21:37,938 INFO L225 Difference]: With dead ends: 104706 [2020-10-13 14:21:37,938 INFO L226 Difference]: Without dead ends: 65920 [2020-10-13 14:21:37,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=338, Invalid=1302, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 14:21:38,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65920 states. [2020-10-13 14:21:43,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65920 to 38954. [2020-10-13 14:21:43,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38954 states. [2020-10-13 14:21:43,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38954 states to 38954 states and 54921 transitions. [2020-10-13 14:21:43,990 INFO L78 Accepts]: Start accepts. Automaton has 38954 states and 54921 transitions. Word has length 97 [2020-10-13 14:21:43,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:21:43,990 INFO L479 AbstractCegarLoop]: Abstraction has 38954 states and 54921 transitions. [2020-10-13 14:21:43,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 14:21:43,990 INFO L276 IsEmpty]: Start isEmpty. Operand 38954 states and 54921 transitions. [2020-10-13 14:21:44,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 14:21:44,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:21:44,000 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:21:44,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 14:21:44,001 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:21:44,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:21:44,001 INFO L82 PathProgramCache]: Analyzing trace with hash 524047950, now seen corresponding path program 1 times [2020-10-13 14:21:44,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:21:44,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448345995] [2020-10-13 14:21:44,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:21:44,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:21:44,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:44,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:44,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:44,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:44,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:44,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:44,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:44,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:44,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:45,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:49,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:21:49,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 14:21:49,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:21:49,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 14:21:49,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:21:49,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:21:49,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:21:49,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 14:21:49,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:21:49,172 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:21:49,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:21:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:21:49,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:49,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:21:49,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:21:49,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:21:49,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 14:21:49,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:21:49,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:21:49,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:21:49,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:21:49,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:21:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 14:21:49,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448345995] [2020-10-13 14:21:49,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:21:49,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:21:49,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725605850] [2020-10-13 14:21:49,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:21:49,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:21:49,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:21:49,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:21:49,206 INFO L87 Difference]: Start difference. First operand 38954 states and 54921 transitions. Second operand 6 states. [2020-10-13 14:21:49,353 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-13 14:21:56,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:21:56,184 INFO L93 Difference]: Finished difference Result 77895 states and 109834 transitions. [2020-10-13 14:21:56,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:21:56,185 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2020-10-13 14:21:56,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:21:56,222 INFO L225 Difference]: With dead ends: 77895 [2020-10-13 14:21:56,222 INFO L226 Difference]: Without dead ends: 38981 [2020-10-13 14:21:56,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:21:56,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38981 states. [2020-10-13 14:22:01,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38981 to 38954. [2020-10-13 14:22:01,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38954 states. [2020-10-13 14:22:01,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38954 states to 38954 states and 54921 transitions. [2020-10-13 14:22:01,829 INFO L78 Accepts]: Start accepts. Automaton has 38954 states and 54921 transitions. Word has length 97 [2020-10-13 14:22:01,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:22:01,830 INFO L479 AbstractCegarLoop]: Abstraction has 38954 states and 54921 transitions. [2020-10-13 14:22:01,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:22:01,830 INFO L276 IsEmpty]: Start isEmpty. Operand 38954 states and 54921 transitions. [2020-10-13 14:22:01,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 14:22:01,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:22:01,836 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:22:01,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 14:22:01,836 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:22:01,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:22:01,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1622290575, now seen corresponding path program 1 times [2020-10-13 14:22:01,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:22:01,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978546014] [2020-10-13 14:22:01,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:22:01,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:22:01,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:01,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:01,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:02,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:02,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:02,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:02,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:02,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:03,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:04,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:04,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:05,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:05,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:06,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:22:06,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 14:22:06,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 14:22:06,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:22:06,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:22:06,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:22:06,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 14:22:06,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 14:22:06,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:22:07,081 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2020-10-13 14:22:07,315 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:22:07,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:22:07,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:22:07,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:07,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:22:07,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:22:07,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:22:07,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:22:07,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:22:07,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:22:07,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:22:07,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:22:07,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:22:07,340 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:22:07,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978546014] [2020-10-13 14:22:07,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:22:07,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 14:22:07,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154961630] [2020-10-13 14:22:07,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:22:07,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:22:07,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:22:07,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:22:07,342 INFO L87 Difference]: Start difference. First operand 38954 states and 54921 transitions. Second operand 12 states. [2020-10-13 14:22:07,604 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-13 14:22:08,570 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-10-13 14:22:15,454 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59