/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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 19:56:06,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 19:56:06,651 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 19:56:06,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 19:56:06,674 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 19:56:06,675 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 19:56:06,677 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 19:56:06,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 19:56:06,680 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 19:56:06,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 19:56:06,682 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 19:56:06,683 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 19:56:06,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 19:56:06,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 19:56:06,687 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 19:56:06,688 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 19:56:06,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 19:56:06,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 19:56:06,694 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 19:56:06,697 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 19:56:06,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 19:56:06,704 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 19:56:06,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 19:56:06,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 19:56:06,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 19:56:06,710 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 19:56:06,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 19:56:06,711 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 19:56:06,712 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 19:56:06,714 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 19:56:06,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 19:56:06,715 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 19:56:06,716 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 19:56:06,718 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 19:56:06,719 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 19:56:06,719 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 19:56:06,720 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 19:56:06,720 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 19:56:06,720 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 19:56:06,730 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 19:56:06,731 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 19:56:06,732 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 [2020-10-12 19:56:06,780 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 19:56:06,780 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 19:56:06,783 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 19:56:06,783 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 19:56:06,784 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 19:56:06,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 19:56:06,784 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 19:56:06,784 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 19:56:06,784 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 19:56:06,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 19:56:06,785 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 19:56:06,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 19:56:06,786 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 19:56:06,786 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 19:56:06,787 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 19:56:06,787 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 19:56:06,787 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 19:56:06,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 19:56:06,787 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 19:56:06,788 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 19:56:06,788 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 19:56:06,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:56:06,789 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 19:56:06,789 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 19:56:06,789 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 19:56:06,790 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 19:56:06,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 19:56:06,790 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 19:56:06,790 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 19:56:06,791 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 19:56:07,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 19:56:07,122 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 19:56:07,126 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 19:56:07,127 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 19:56:07,128 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 19:56:07,128 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-12 19:56:07,205 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0695f9bdc/a7e316080b464fcba39b258bad57df49/FLAG1ac33a399 [2020-10-12 19:56:07,729 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 19:56:07,730 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-12 19:56:07,753 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0695f9bdc/a7e316080b464fcba39b258bad57df49/FLAG1ac33a399 [2020-10-12 19:56:08,086 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0695f9bdc/a7e316080b464fcba39b258bad57df49 [2020-10-12 19:56:08,094 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 19:56:08,096 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 19:56:08,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 19:56:08,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 19:56:08,100 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 19:56:08,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:56:08" (1/1) ... [2020-10-12 19:56:08,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39c1a6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:56:08, skipping insertion in model container [2020-10-12 19:56:08,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:56:08" (1/1) ... [2020-10-12 19:56:08,112 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 19:56:08,156 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 19:56:08,586 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:56:08,596 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 19:56:08,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:56:08,701 INFO L208 MainTranslator]: Completed translation [2020-10-12 19:56:08,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:56:08 WrapperNode [2020-10-12 19:56:08,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 19:56:08,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 19:56:08,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 19:56:08,703 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 19:56:08,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:56:08" (1/1) ... [2020-10-12 19:56:08,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:56:08" (1/1) ... [2020-10-12 19:56:08,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:56:08" (1/1) ... [2020-10-12 19:56:08,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:56:08" (1/1) ... [2020-10-12 19:56:08,743 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:56:08" (1/1) ... [2020-10-12 19:56:08,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:56:08" (1/1) ... [2020-10-12 19:56:08,761 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:56:08" (1/1) ... [2020-10-12 19:56:08,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 19:56:08,767 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 19:56:08,767 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 19:56:08,767 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 19:56:08,768 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:56:08" (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 [2020-10-12 19:56:08,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 19:56:08,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 19:56:08,833 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 19:56:08,833 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 19:56:08,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 19:56:08,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 19:56:08,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 19:56:08,835 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 19:56:08,835 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 19:56:08,835 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 19:56:08,835 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 19:56:08,835 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 19:56:08,836 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 19:56:08,836 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 19:56:08,836 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 19:56:08,837 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 19:56:08,837 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 19:56:08,837 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 19:56:08,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 19:56:08,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 19:56:09,594 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 19:56:09,594 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 19:56:09,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:56:09 BoogieIcfgContainer [2020-10-12 19:56:09,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 19:56:09,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 19:56:09,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 19:56:09,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 19:56:09,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:56:08" (1/3) ... [2020-10-12 19:56:09,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf64c94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:56:09, skipping insertion in model container [2020-10-12 19:56:09,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:56:08" (2/3) ... [2020-10-12 19:56:09,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf64c94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:56:09, skipping insertion in model container [2020-10-12 19:56:09,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:56:09" (3/3) ... [2020-10-12 19:56:09,610 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-12 19:56:09,621 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 19:56:09,630 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 19:56:09,646 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 19:56:09,674 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 19:56:09,674 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 19:56:09,674 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 19:56:09,674 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 19:56:09,675 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 19:56:09,675 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 19:56:09,675 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 19:56:09,676 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 19:56:09,700 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states. [2020-10-12 19:56:09,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 19:56:09,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:56:09,711 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] [2020-10-12 19:56:09,712 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:56:09,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:56:09,719 INFO L82 PathProgramCache]: Analyzing trace with hash -2097319933, now seen corresponding path program 1 times [2020-10-12 19:56:09,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:56:09,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476952891] [2020-10-12 19:56:09,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:56:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:10,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:10,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:10,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:11,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:11,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 19:56:11,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:56:11,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1586 [2020-10-12 19:56:11,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:11,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:56:11,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:56:11,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 19:56:11,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 29 [2020-10-12 19:56:11,946 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-12 19:56:11,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:56:11,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:11,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:11,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:11,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:56:11,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:56:11,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:56:11,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:11,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:56:11,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:56:11,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:56:11,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:56:12,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476952891] [2020-10-12 19:56:12,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:56:12,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:56:12,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504546418] [2020-10-12 19:56:12,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:56:12,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:56:12,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:56:12,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:56:12,027 INFO L87 Difference]: Start difference. First operand 167 states. Second operand 6 states. [2020-10-12 19:56:12,233 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 19:56:13,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:56:13,268 INFO L93 Difference]: Finished difference Result 526 states and 845 transitions. [2020-10-12 19:56:13,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:56:13,270 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-12 19:56:13,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:56:13,303 INFO L225 Difference]: With dead ends: 526 [2020-10-12 19:56:13,303 INFO L226 Difference]: Without dead ends: 442 [2020-10-12 19:56:13,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:56:13,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2020-10-12 19:56:13,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 260. [2020-10-12 19:56:13,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-12 19:56:13,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 386 transitions. [2020-10-12 19:56:13,442 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 386 transitions. Word has length 54 [2020-10-12 19:56:13,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:56:13,444 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 386 transitions. [2020-10-12 19:56:13,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:56:13,445 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 386 transitions. [2020-10-12 19:56:13,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:56:13,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:56:13,449 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] [2020-10-12 19:56:13,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 19:56:13,450 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:56:13,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:56:13,450 INFO L82 PathProgramCache]: Analyzing trace with hash -926705827, now seen corresponding path program 1 times [2020-10-12 19:56:13,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:56:13,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578319664] [2020-10-12 19:56:13,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:56:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:13,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:13,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:13,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:13,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:14,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:18,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:18,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:56:18,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:56:18,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 19:56:18,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:18,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:56:18,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:56:18,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 19:56:18,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:56:18,753 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-12 19:56:18,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:56:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:18,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:18,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:18,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:56:18,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:56:18,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-12 19:56:18,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:18,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:56:18,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:56:18,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:56:18,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-12 19:56:18,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:56:18,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578319664] [2020-10-12 19:56:18,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:56:18,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:56:18,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789672628] [2020-10-12 19:56:18,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:56:18,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:56:18,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:56:18,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:56:18,824 INFO L87 Difference]: Start difference. First operand 260 states and 386 transitions. Second operand 8 states. [2020-10-12 19:56:18,983 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-12 19:56:20,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:56:20,061 INFO L93 Difference]: Finished difference Result 1202 states and 1838 transitions. [2020-10-12 19:56:20,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:56:20,061 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-12 19:56:20,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:56:20,068 INFO L225 Difference]: With dead ends: 1202 [2020-10-12 19:56:20,068 INFO L226 Difference]: Without dead ends: 1012 [2020-10-12 19:56:20,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:56:20,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2020-10-12 19:56:20,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 296. [2020-10-12 19:56:20,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-10-12 19:56:20,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 426 transitions. [2020-10-12 19:56:20,129 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 426 transitions. Word has length 57 [2020-10-12 19:56:20,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:56:20,129 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 426 transitions. [2020-10-12 19:56:20,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:56:20,129 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 426 transitions. [2020-10-12 19:56:20,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:56:20,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:56:20,139 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] [2020-10-12 19:56:20,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 19:56:20,140 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:56:20,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:56:20,140 INFO L82 PathProgramCache]: Analyzing trace with hash -559847393, now seen corresponding path program 1 times [2020-10-12 19:56:20,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:56:20,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839635910] [2020-10-12 19:56:20,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:56:20,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:20,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:20,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:20,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:20,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:20,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:22,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:22,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:56:22,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:56:22,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2807 [2020-10-12 19:56:22,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:22,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:56:22,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:56:22,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 19:56:22,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:56:23,275 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-12 19:56:23,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:56:23,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:23,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:23,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:23,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:56:23,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:56:23,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 19:56:23,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:23,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:56:23,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:56:23,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:56:23,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:56:23,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839635910] [2020-10-12 19:56:23,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:56:23,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:56:23,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128303539] [2020-10-12 19:56:23,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:56:23,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:56:23,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:56:23,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:56:23,321 INFO L87 Difference]: Start difference. First operand 296 states and 426 transitions. Second operand 8 states. [2020-10-12 19:56:24,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:56:24,354 INFO L93 Difference]: Finished difference Result 1082 states and 1606 transitions. [2020-10-12 19:56:24,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:56:24,354 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-12 19:56:24,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:56:24,360 INFO L225 Difference]: With dead ends: 1082 [2020-10-12 19:56:24,360 INFO L226 Difference]: Without dead ends: 904 [2020-10-12 19:56:24,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:56:24,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2020-10-12 19:56:24,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 360. [2020-10-12 19:56:24,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-10-12 19:56:24,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 510 transitions. [2020-10-12 19:56:24,396 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 510 transitions. Word has length 57 [2020-10-12 19:56:24,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:56:24,397 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 510 transitions. [2020-10-12 19:56:24,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:56:24,397 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 510 transitions. [2020-10-12 19:56:24,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:56:24,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:56:24,399 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] [2020-10-12 19:56:24,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 19:56:24,399 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:56:24,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:56:24,400 INFO L82 PathProgramCache]: Analyzing trace with hash 980837471, now seen corresponding path program 1 times [2020-10-12 19:56:24,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:56:24,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208833476] [2020-10-12 19:56:24,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:56:24,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:24,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:24,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:24,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:24,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:25,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:27,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:27,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:56:27,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:56:27,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2924 [2020-10-12 19:56:27,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:27,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:56:27,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:56:27,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 19:56:27,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:27,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:56:27,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:27,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:27,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:27,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:56:27,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:56:27,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 19:56:27,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:27,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:56:27,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:56:27,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:56:27,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:56:27,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208833476] [2020-10-12 19:56:27,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:56:27,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:56:27,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887946299] [2020-10-12 19:56:27,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:56:27,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:56:27,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:56:27,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:56:27,542 INFO L87 Difference]: Start difference. First operand 360 states and 510 transitions. Second operand 8 states. [2020-10-12 19:56:29,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:56:29,093 INFO L93 Difference]: Finished difference Result 1082 states and 1562 transitions. [2020-10-12 19:56:29,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:56:29,094 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-12 19:56:29,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:56:29,101 INFO L225 Difference]: With dead ends: 1082 [2020-10-12 19:56:29,102 INFO L226 Difference]: Without dead ends: 856 [2020-10-12 19:56:29,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:56:29,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2020-10-12 19:56:29,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 400. [2020-10-12 19:56:29,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-10-12 19:56:29,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 554 transitions. [2020-10-12 19:56:29,173 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 554 transitions. Word has length 57 [2020-10-12 19:56:29,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:56:29,176 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 554 transitions. [2020-10-12 19:56:29,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:56:29,176 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 554 transitions. [2020-10-12 19:56:29,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 19:56:29,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:56:29,180 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] [2020-10-12 19:56:29,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 19:56:29,181 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:56:29,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:56:29,182 INFO L82 PathProgramCache]: Analyzing trace with hash 393077064, now seen corresponding path program 1 times [2020-10-12 19:56:29,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:56:29,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554585279] [2020-10-12 19:56:29,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:56:29,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:29,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:29,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:29,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:29,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:29,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:29,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:30,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:32,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:34,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:34,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 19:56:34,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:56:34,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:56:34,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:34,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:56:34,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:56:34,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 19:56:34,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:34,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:56:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:34,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:34,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:34,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:56:34,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:56:34,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:56:34,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:34,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:56:34,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:56:34,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:56:34,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:34,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:56:34,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554585279] [2020-10-12 19:56:34,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:56:34,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-12 19:56:34,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745089799] [2020-10-12 19:56:34,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:56:34,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:56:34,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:56:34,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:56:34,697 INFO L87 Difference]: Start difference. First operand 400 states and 554 transitions. Second operand 11 states. [2020-10-12 19:56:34,859 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-12 19:56:38,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:56:38,210 INFO L93 Difference]: Finished difference Result 2908 states and 4173 transitions. [2020-10-12 19:56:38,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 19:56:38,210 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2020-10-12 19:56:38,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:56:38,225 INFO L225 Difference]: With dead ends: 2908 [2020-10-12 19:56:38,225 INFO L226 Difference]: Without dead ends: 2794 [2020-10-12 19:56:38,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=310, Invalid=1022, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 19:56:38,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2794 states. [2020-10-12 19:56:38,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2794 to 436. [2020-10-12 19:56:38,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2020-10-12 19:56:38,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 602 transitions. [2020-10-12 19:56:38,307 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 602 transitions. Word has length 58 [2020-10-12 19:56:38,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:56:38,307 INFO L479 AbstractCegarLoop]: Abstraction has 436 states and 602 transitions. [2020-10-12 19:56:38,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:56:38,308 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 602 transitions. [2020-10-12 19:56:38,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 19:56:38,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:56:38,309 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] [2020-10-12 19:56:38,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 19:56:38,309 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:56:38,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:56:38,310 INFO L82 PathProgramCache]: Analyzing trace with hash -342208713, now seen corresponding path program 1 times [2020-10-12 19:56:38,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:56:38,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71323340] [2020-10-12 19:56:38,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:56:38,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:38,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:38,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:38,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:38,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:39,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:39,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:39,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:40,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:43,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:43,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 19:56:43,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:56:43,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4936 [2020-10-12 19:56:43,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:43,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:56:43,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:56:43,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 19:56:43,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:43,483 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 25 [2020-10-12 19:56:43,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:56:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:43,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:43,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:43,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:56:43,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:56:43,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:56:43,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:43,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:56:43,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:56:43,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:56:43,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:56:43,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71323340] [2020-10-12 19:56:43,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:56:43,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-12 19:56:43,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521909810] [2020-10-12 19:56:43,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:56:43,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:56:43,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:56:43,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:56:43,657 INFO L87 Difference]: Start difference. First operand 436 states and 602 transitions. Second operand 11 states. [2020-10-12 19:56:46,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:56:46,459 INFO L93 Difference]: Finished difference Result 1672 states and 2387 transitions. [2020-10-12 19:56:46,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:56:46,459 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2020-10-12 19:56:46,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:56:46,466 INFO L225 Difference]: With dead ends: 1672 [2020-10-12 19:56:46,466 INFO L226 Difference]: Without dead ends: 1386 [2020-10-12 19:56:46,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2020-10-12 19:56:46,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2020-10-12 19:56:46,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 610. [2020-10-12 19:56:46,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 610 states. [2020-10-12 19:56:46,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 851 transitions. [2020-10-12 19:56:46,563 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 851 transitions. Word has length 58 [2020-10-12 19:56:46,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:56:46,564 INFO L479 AbstractCegarLoop]: Abstraction has 610 states and 851 transitions. [2020-10-12 19:56:46,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:56:46,564 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 851 transitions. [2020-10-12 19:56:46,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 19:56:46,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:56:46,565 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] [2020-10-12 19:56:46,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 19:56:46,566 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:56:46,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:56:46,566 INFO L82 PathProgramCache]: Analyzing trace with hash 78124196, now seen corresponding path program 1 times [2020-10-12 19:56:46,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:56:46,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343004398] [2020-10-12 19:56:46,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:56:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:46,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:46,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:46,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:46,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:46,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:47,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:47,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:48,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:51,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:51,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 19:56:51,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:56:51,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4689 [2020-10-12 19:56:51,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:51,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:56:51,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:56:51,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 19:56:51,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:51,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:56:51,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:51,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:51,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:51,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:56:51,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:56:51,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-12 19:56:51,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:51,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:56:51,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:56:51,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:56:51,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:56:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:56:51,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343004398] [2020-10-12 19:56:51,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:56:51,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:56:51,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801355304] [2020-10-12 19:56:51,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:56:51,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:56:51,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:56:51,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:56:51,639 INFO L87 Difference]: Start difference. First operand 610 states and 851 transitions. Second operand 11 states. [2020-10-12 19:56:51,828 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-12 19:56:55,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:56:55,947 INFO L93 Difference]: Finished difference Result 6081 states and 8779 transitions. [2020-10-12 19:56:55,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 19:56:55,948 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2020-10-12 19:56:55,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:56:55,971 INFO L225 Difference]: With dead ends: 6081 [2020-10-12 19:56:55,971 INFO L226 Difference]: Without dead ends: 5599 [2020-10-12 19:56:55,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=439, Invalid=1367, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 19:56:55,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5599 states. [2020-10-12 19:56:56,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5599 to 1053. [2020-10-12 19:56:56,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1053 states. [2020-10-12 19:56:56,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 1483 transitions. [2020-10-12 19:56:56,200 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 1483 transitions. Word has length 58 [2020-10-12 19:56:56,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:56:56,201 INFO L479 AbstractCegarLoop]: Abstraction has 1053 states and 1483 transitions. [2020-10-12 19:56:56,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:56:56,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 1483 transitions. [2020-10-12 19:56:56,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 19:56:56,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:56:56,203 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] [2020-10-12 19:56:56,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 19:56:56,203 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:56:56,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:56:56,204 INFO L82 PathProgramCache]: Analyzing trace with hash 672079247, now seen corresponding path program 1 times [2020-10-12 19:56:56,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:56:56,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780540119] [2020-10-12 19:56:56,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:56:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:56,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:56,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:56,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:56,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:56,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:56,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:56,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:56,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:56,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:59,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:01,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:57:01,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 19:57:01,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:57:01,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:57:01,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:57:01,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:57:01,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:57:01,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 19:57:01,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:57:01,481 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-12 19:57:01,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:57:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:57:01,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:01,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:57:01,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:57:01,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:57:01,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 19:57:01,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:57:01,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:57:01,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:57:01,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:57:01,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:57:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:57:01,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780540119] [2020-10-12 19:57:01,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:57:01,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:57:01,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711235771] [2020-10-12 19:57:01,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:57:01,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:57:01,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:57:01,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:57:01,555 INFO L87 Difference]: Start difference. First operand 1053 states and 1483 transitions. Second operand 11 states. [2020-10-12 19:57:03,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:57:03,882 INFO L93 Difference]: Finished difference Result 4523 states and 6551 transitions. [2020-10-12 19:57:03,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 19:57:03,882 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-10-12 19:57:03,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:57:03,894 INFO L225 Difference]: With dead ends: 4523 [2020-10-12 19:57:03,895 INFO L226 Difference]: Without dead ends: 3679 [2020-10-12 19:57:03,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2020-10-12 19:57:03,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3679 states. [2020-10-12 19:57:04,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3679 to 1481. [2020-10-12 19:57:04,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1481 states. [2020-10-12 19:57:04,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 2108 transitions. [2020-10-12 19:57:04,242 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 2108 transitions. Word has length 59 [2020-10-12 19:57:04,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:57:04,242 INFO L479 AbstractCegarLoop]: Abstraction has 1481 states and 2108 transitions. [2020-10-12 19:57:04,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:57:04,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 2108 transitions. [2020-10-12 19:57:04,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 19:57:04,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:57:04,244 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] [2020-10-12 19:57:04,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 19:57:04,244 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:57:04,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:57:04,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1020330920, now seen corresponding path program 1 times [2020-10-12 19:57:04,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:57:04,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941122733] [2020-10-12 19:57:04,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:57:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:57:04,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:04,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:04,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:04,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:57:04,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 19:57:04,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:57:04,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 689 [2020-10-12 19:57:04,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:57:04,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:57:04,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:57:04,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 19:57:04,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:57:05,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:57:05,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:57:05,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:05,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:57:05,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:57:05,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:57:05,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:57:05,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:57:05,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:57:05,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:57:05,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:57:05,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:57:05,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:57:05,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941122733] [2020-10-12 19:57:05,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:57:05,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:57:05,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970483881] [2020-10-12 19:57:05,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:57:05,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:57:05,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:57:05,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:57:05,315 INFO L87 Difference]: Start difference. First operand 1481 states and 2108 transitions. Second operand 10 states. [2020-10-12 19:57:05,461 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-12 19:57:08,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:57:08,501 INFO L93 Difference]: Finished difference Result 5501 states and 7986 transitions. [2020-10-12 19:57:08,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 19:57:08,502 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-10-12 19:57:08,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:57:08,518 INFO L225 Difference]: With dead ends: 5501 [2020-10-12 19:57:08,518 INFO L226 Difference]: Without dead ends: 4949 [2020-10-12 19:57:08,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-12 19:57:08,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4949 states. [2020-10-12 19:57:08,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4949 to 1303. [2020-10-12 19:57:08,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1303 states. [2020-10-12 19:57:08,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 1856 transitions. [2020-10-12 19:57:08,816 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 1856 transitions. Word has length 59 [2020-10-12 19:57:08,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:57:08,817 INFO L479 AbstractCegarLoop]: Abstraction has 1303 states and 1856 transitions. [2020-10-12 19:57:08,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:57:08,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 1856 transitions. [2020-10-12 19:57:08,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 19:57:08,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:57:08,820 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:57:08,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 19:57:08,821 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:57:08,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:57:08,821 INFO L82 PathProgramCache]: Analyzing trace with hash -2099063966, now seen corresponding path program 1 times [2020-10-12 19:57:08,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:57:08,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888329953] [2020-10-12 19:57:08,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:57:08,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:57:08,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:08,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:08,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:08,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:09,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:10,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:57:10,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 19:57:10,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:57:10,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2047 [2020-10-12 19:57:10,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:57:10,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:57:10,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-12 19:57:10,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 19:57:10,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:57:11,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:57:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:57:11,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:11,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:57:11,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:57:11,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:57:11,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:57:11,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:57:11,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:57:11,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:57:11,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:57:11,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:57:11,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:57:11,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888329953] [2020-10-12 19:57:11,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:57:11,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:57:11,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455264022] [2020-10-12 19:57:11,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:57:11,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:57:11,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:57:11,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:57:11,100 INFO L87 Difference]: Start difference. First operand 1303 states and 1856 transitions. Second operand 6 states. [2020-10-12 19:57:12,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:57:12,377 INFO L93 Difference]: Finished difference Result 2873 states and 4145 transitions. [2020-10-12 19:57:12,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:57:12,378 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-12 19:57:12,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:57:12,387 INFO L225 Difference]: With dead ends: 2873 [2020-10-12 19:57:12,387 INFO L226 Difference]: Without dead ends: 2871 [2020-10-12 19:57:12,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:57:12,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2020-10-12 19:57:12,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 1351. [2020-10-12 19:57:12,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1351 states. [2020-10-12 19:57:12,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 1904 transitions. [2020-10-12 19:57:12,672 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 1904 transitions. Word has length 73 [2020-10-12 19:57:12,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:57:12,672 INFO L479 AbstractCegarLoop]: Abstraction has 1351 states and 1904 transitions. [2020-10-12 19:57:12,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:57:12,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 1904 transitions. [2020-10-12 19:57:12,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 19:57:12,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:57:12,676 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:57:12,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 19:57:12,676 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:57:12,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:57:12,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1868211929, now seen corresponding path program 1 times [2020-10-12 19:57:12,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:57:12,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689981022] [2020-10-12 19:57:12,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:57:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:57:12,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:12,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:12,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:12,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:13,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:13,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:57:13,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 19:57:13,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:57:13,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1014 [2020-10-12 19:57:13,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:57:13,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:57:13,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 19:57:13,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 19:57:13,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:57:13,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:57:13,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:57:13,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:13,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:57:13,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:57:13,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:57:13,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:57:13,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:57:13,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:57:13,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:57:13,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:57:13,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:57:13,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:57:13,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689981022] [2020-10-12 19:57:13,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:57:13,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:57:13,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651529261] [2020-10-12 19:57:13,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:57:13,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:57:13,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:57:13,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:57:13,866 INFO L87 Difference]: Start difference. First operand 1351 states and 1904 transitions. Second operand 6 states. [2020-10-12 19:57:15,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:57:15,157 INFO L93 Difference]: Finished difference Result 4203 states and 6003 transitions. [2020-10-12 19:57:15,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:57:15,157 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-10-12 19:57:15,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:57:15,171 INFO L225 Difference]: With dead ends: 4203 [2020-10-12 19:57:15,171 INFO L226 Difference]: Without dead ends: 3096 [2020-10-12 19:57:15,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:57:15,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3096 states. [2020-10-12 19:57:15,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3096 to 2536. [2020-10-12 19:57:15,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2536 states. [2020-10-12 19:57:15,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2536 states to 2536 states and 3580 transitions. [2020-10-12 19:57:15,720 INFO L78 Accepts]: Start accepts. Automaton has 2536 states and 3580 transitions. Word has length 74 [2020-10-12 19:57:15,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:57:15,721 INFO L479 AbstractCegarLoop]: Abstraction has 2536 states and 3580 transitions. [2020-10-12 19:57:15,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:57:15,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2536 states and 3580 transitions. [2020-10-12 19:57:15,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 19:57:15,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:57:15,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:57:15,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 19:57:15,726 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:57:15,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:57:15,726 INFO L82 PathProgramCache]: Analyzing trace with hash -778995440, now seen corresponding path program 1 times [2020-10-12 19:57:15,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:57:15,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662113612] [2020-10-12 19:57:15,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:57:15,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:57:15,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:15,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:15,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:15,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:16,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:16,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:57:16,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 19:57:16,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:57:16,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1073 [2020-10-12 19:57:16,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:57:16,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:57:16,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:57:16,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 19:57:16,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:57:16,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:57:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:57:16,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:16,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:57:16,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:57:16,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:57:16,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:57:16,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:57:16,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:57:16,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:57:16,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:57:16,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:57:16,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:57:16,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662113612] [2020-10-12 19:57:16,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:57:16,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:57:16,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186720894] [2020-10-12 19:57:16,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:57:16,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:57:16,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:57:16,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:57:16,976 INFO L87 Difference]: Start difference. First operand 2536 states and 3580 transitions. Second operand 6 states. [2020-10-12 19:57:17,104 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-12 19:57:18,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:57:18,504 INFO L93 Difference]: Finished difference Result 5960 states and 8514 transitions. [2020-10-12 19:57:18,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:57:18,504 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-12 19:57:18,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:57:18,513 INFO L225 Difference]: With dead ends: 5960 [2020-10-12 19:57:18,514 INFO L226 Difference]: Without dead ends: 3814 [2020-10-12 19:57:18,519 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 [2020-10-12 19:57:18,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3814 states. [2020-10-12 19:57:19,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3814 to 3812. [2020-10-12 19:57:19,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3812 states. [2020-10-12 19:57:19,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3812 states to 3812 states and 5412 transitions. [2020-10-12 19:57:19,382 INFO L78 Accepts]: Start accepts. Automaton has 3812 states and 5412 transitions. Word has length 75 [2020-10-12 19:57:19,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:57:19,383 INFO L479 AbstractCegarLoop]: Abstraction has 3812 states and 5412 transitions. [2020-10-12 19:57:19,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:57:19,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3812 states and 5412 transitions. [2020-10-12 19:57:19,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 19:57:19,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:57:19,389 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:57:19,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 19:57:19,389 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:57:19,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:57:19,389 INFO L82 PathProgramCache]: Analyzing trace with hash 35246785, now seen corresponding path program 1 times [2020-10-12 19:57:19,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:57:19,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941331226] [2020-10-12 19:57:19,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:57:19,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:57:19,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:19,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:19,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:19,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:19,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:20,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:57:20,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 19:57:20,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:57:20,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1140 [2020-10-12 19:57:20,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:57:20,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:57:20,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:57:20,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 19:57:20,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:57:20,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:57:20,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:57:20,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:20,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:57:20,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:57:20,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:57:20,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:57:20,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:57:20,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:57:20,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:57:20,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:57:20,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:57:20,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:57:20,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941331226] [2020-10-12 19:57:20,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:57:20,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:57:20,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898244874] [2020-10-12 19:57:20,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:57:20,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:57:20,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:57:20,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:57:20,709 INFO L87 Difference]: Start difference. First operand 3812 states and 5412 transitions. Second operand 6 states. [2020-10-12 19:57:20,844 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-12 19:57:22,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:57:22,632 INFO L93 Difference]: Finished difference Result 8436 states and 12086 transitions. [2020-10-12 19:57:22,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:57:22,633 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-12 19:57:22,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:57:22,645 INFO L225 Difference]: With dead ends: 8436 [2020-10-12 19:57:22,645 INFO L226 Difference]: Without dead ends: 5314 [2020-10-12 19:57:22,653 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 [2020-10-12 19:57:22,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5314 states. [2020-10-12 19:57:23,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5314 to 5312. [2020-10-12 19:57:23,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5312 states. [2020-10-12 19:57:23,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5312 states to 5312 states and 7566 transitions. [2020-10-12 19:57:23,974 INFO L78 Accepts]: Start accepts. Automaton has 5312 states and 7566 transitions. Word has length 75 [2020-10-12 19:57:23,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:57:23,974 INFO L479 AbstractCegarLoop]: Abstraction has 5312 states and 7566 transitions. [2020-10-12 19:57:23,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:57:23,974 INFO L276 IsEmpty]: Start isEmpty. Operand 5312 states and 7566 transitions. [2020-10-12 19:57:23,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 19:57:23,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:57:23,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:57:23,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 19:57:23,981 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:57:23,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:57:23,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1210744718, now seen corresponding path program 1 times [2020-10-12 19:57:23,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:57:23,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85644144] [2020-10-12 19:57:23,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:57:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:57:24,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:24,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:24,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:24,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:24,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:25,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:57:25,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 19:57:25,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:57:25,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1218 [2020-10-12 19:57:25,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:57:25,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:57:25,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:57:25,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 19:57:25,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:57:25,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:57:25,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:57:25,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:25,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:57:25,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:57:25,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:57:25,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:57:25,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:57:25,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:57:25,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:57:25,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:57:25,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:57:25,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:57:25,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85644144] [2020-10-12 19:57:25,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:57:25,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:57:25,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756097105] [2020-10-12 19:57:25,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:57:25,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:57:25,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:57:25,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:57:25,389 INFO L87 Difference]: Start difference. First operand 5312 states and 7566 transitions. Second operand 6 states. [2020-10-12 19:57:27,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:57:27,740 INFO L93 Difference]: Finished difference Result 12716 states and 18265 transitions. [2020-10-12 19:57:27,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:57:27,741 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-12 19:57:27,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:57:27,758 INFO L225 Difference]: With dead ends: 12716 [2020-10-12 19:57:27,758 INFO L226 Difference]: Without dead ends: 7502 [2020-10-12 19:57:27,770 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 [2020-10-12 19:57:27,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7502 states. [2020-10-12 19:57:29,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7502 to 7500. [2020-10-12 19:57:29,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7500 states. [2020-10-12 19:57:29,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7500 states to 7500 states and 10671 transitions. [2020-10-12 19:57:29,657 INFO L78 Accepts]: Start accepts. Automaton has 7500 states and 10671 transitions. Word has length 75 [2020-10-12 19:57:29,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:57:29,657 INFO L479 AbstractCegarLoop]: Abstraction has 7500 states and 10671 transitions. [2020-10-12 19:57:29,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:57:29,657 INFO L276 IsEmpty]: Start isEmpty. Operand 7500 states and 10671 transitions. [2020-10-12 19:57:29,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 19:57:29,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:57:29,663 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:57:29,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 19:57:29,663 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:57:29,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:57:29,664 INFO L82 PathProgramCache]: Analyzing trace with hash -415968594, now seen corresponding path program 1 times [2020-10-12 19:57:29,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:57:29,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326366974] [2020-10-12 19:57:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:57:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:57:29,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:29,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:29,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:29,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:30,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:30,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:32,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:57:32,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 19:57:32,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:57:32,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2767 [2020-10-12 19:57:32,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:57:32,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:57:32,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:57:32,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 19:57:32,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:57:32,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:57:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:57:32,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:32,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:57:32,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:57:32,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:57:32,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:57:32,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:57:32,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:57:32,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:57:32,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:57:32,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:57:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:57:32,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326366974] [2020-10-12 19:57:32,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:57:32,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:57:32,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359813753] [2020-10-12 19:57:32,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:57:32,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:57:32,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:57:32,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:57:32,726 INFO L87 Difference]: Start difference. First operand 7500 states and 10671 transitions. Second operand 11 states. [2020-10-12 19:57:32,903 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-12 19:57:39,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:57:39,434 INFO L93 Difference]: Finished difference Result 21648 states and 30800 transitions. [2020-10-12 19:57:39,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 19:57:39,434 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 76 [2020-10-12 19:57:39,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:57:39,474 INFO L225 Difference]: With dead ends: 21648 [2020-10-12 19:57:39,474 INFO L226 Difference]: Without dead ends: 19614 [2020-10-12 19:57:39,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2020-10-12 19:57:39,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19614 states. [2020-10-12 19:57:41,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19614 to 7500. [2020-10-12 19:57:41,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7500 states. [2020-10-12 19:57:41,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7500 states to 7500 states and 10667 transitions. [2020-10-12 19:57:41,417 INFO L78 Accepts]: Start accepts. Automaton has 7500 states and 10667 transitions. Word has length 76 [2020-10-12 19:57:41,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:57:41,417 INFO L479 AbstractCegarLoop]: Abstraction has 7500 states and 10667 transitions. [2020-10-12 19:57:41,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:57:41,417 INFO L276 IsEmpty]: Start isEmpty. Operand 7500 states and 10667 transitions. [2020-10-12 19:57:41,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 19:57:41,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:57:41,429 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:57:41,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 19:57:41,429 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:57:41,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:57:41,430 INFO L82 PathProgramCache]: Analyzing trace with hash -81099186, now seen corresponding path program 1 times [2020-10-12 19:57:41,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:57:41,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103778964] [2020-10-12 19:57:41,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:57:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:57:41,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:41,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:41,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:41,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:41,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:42,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:44,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:57:44,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 19:57:44,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:57:44,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3397 [2020-10-12 19:57:44,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:57:44,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:57:44,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:57:44,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 19:57:44,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:57:45,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:57:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:57:45,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:45,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:57:45,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:57:45,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:57:45,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:57:45,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:57:45,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:57:45,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:57:45,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:57:45,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:57:45,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:57:45,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103778964] [2020-10-12 19:57:45,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:57:45,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:57:45,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360419735] [2020-10-12 19:57:45,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:57:45,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:57:45,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:57:45,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:57:45,113 INFO L87 Difference]: Start difference. First operand 7500 states and 10667 transitions. Second operand 11 states. [2020-10-12 19:57:45,272 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-12 19:57:55,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:57:55,327 INFO L93 Difference]: Finished difference Result 36136 states and 51956 transitions. [2020-10-12 19:57:55,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 19:57:55,328 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 76 [2020-10-12 19:57:55,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:57:55,364 INFO L225 Difference]: With dead ends: 36136 [2020-10-12 19:57:55,364 INFO L226 Difference]: Without dead ends: 31456 [2020-10-12 19:57:55,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-12 19:57:55,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31456 states. [2020-10-12 19:57:57,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31456 to 7500. [2020-10-12 19:57:57,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7500 states. [2020-10-12 19:57:57,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7500 states to 7500 states and 10659 transitions. [2020-10-12 19:57:57,518 INFO L78 Accepts]: Start accepts. Automaton has 7500 states and 10659 transitions. Word has length 76 [2020-10-12 19:57:57,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:57:57,518 INFO L479 AbstractCegarLoop]: Abstraction has 7500 states and 10659 transitions. [2020-10-12 19:57:57,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:57:57,519 INFO L276 IsEmpty]: Start isEmpty. Operand 7500 states and 10659 transitions. [2020-10-12 19:57:57,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 19:57:57,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:57:57,523 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:57:57,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 19:57:57,523 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:57:57,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:57:57,523 INFO L82 PathProgramCache]: Analyzing trace with hash 420477422, now seen corresponding path program 1 times [2020-10-12 19:57:57,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:57:57,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710885249] [2020-10-12 19:57:57,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:57:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:57:57,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:57,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:57,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:57,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:58,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:58,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:00,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:58:00,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 19:58:00,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:58:00,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3194 [2020-10-12 19:58:00,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:58:00,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:58:00,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:58:00,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 19:58:00,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:58:00,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:58:00,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:58:00,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:00,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:58:00,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:58:00,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:58:00,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:58:00,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:58:00,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:58:00,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:58:00,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:58:00,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:58:01,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:58:01,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710885249] [2020-10-12 19:58:01,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:58:01,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:58:01,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002202366] [2020-10-12 19:58:01,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:58:01,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:58:01,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:58:01,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:58:01,004 INFO L87 Difference]: Start difference. First operand 7500 states and 10659 transitions. Second operand 11 states. [2020-10-12 19:58:01,202 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-12 19:58:06,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:58:06,030 INFO L93 Difference]: Finished difference Result 18425 states and 26289 transitions. [2020-10-12 19:58:06,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 19:58:06,030 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 76 [2020-10-12 19:58:06,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:58:06,043 INFO L225 Difference]: With dead ends: 18425 [2020-10-12 19:58:06,043 INFO L226 Difference]: Without dead ends: 11405 [2020-10-12 19:58:06,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-10-12 19:58:06,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11405 states. [2020-10-12 19:58:07,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11405 to 6744. [2020-10-12 19:58:07,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6744 states. [2020-10-12 19:58:08,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6744 states to 6744 states and 9565 transitions. [2020-10-12 19:58:08,003 INFO L78 Accepts]: Start accepts. Automaton has 6744 states and 9565 transitions. Word has length 76 [2020-10-12 19:58:08,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:58:08,004 INFO L479 AbstractCegarLoop]: Abstraction has 6744 states and 9565 transitions. [2020-10-12 19:58:08,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:58:08,004 INFO L276 IsEmpty]: Start isEmpty. Operand 6744 states and 9565 transitions. [2020-10-12 19:58:08,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-12 19:58:08,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:58:08,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:58:08,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 19:58:08,008 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:58:08,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:58:08,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1727976573, now seen corresponding path program 1 times [2020-10-12 19:58:08,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:58:08,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542163613] [2020-10-12 19:58:08,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:58:08,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:58:08,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:08,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:08,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:08,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:08,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:58:08,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 19:58:08,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:58:08,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 353 [2020-10-12 19:58:08,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:58:08,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:58:08,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:58:08,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 19:58:08,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:58:08,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:58:08,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:58:08,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:08,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:58:08,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:58:08,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:58:08,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:58:08,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:58:08,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:58:08,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:58:08,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:58:08,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:58:08,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:58:08,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542163613] [2020-10-12 19:58:08,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:58:08,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:58:08,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998399404] [2020-10-12 19:58:08,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:58:08,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:58:08,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:58:08,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:58:08,551 INFO L87 Difference]: Start difference. First operand 6744 states and 9565 transitions. Second operand 6 states. [2020-10-12 19:58:13,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:58:13,811 INFO L93 Difference]: Finished difference Result 22248 states and 31703 transitions. [2020-10-12 19:58:13,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:58:13,812 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-10-12 19:58:13,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:58:13,830 INFO L225 Difference]: With dead ends: 22248 [2020-10-12 19:58:13,830 INFO L226 Difference]: Without dead ends: 16192 [2020-10-12 19:58:13,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:58:13,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16192 states. [2020-10-12 19:58:18,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16192 to 16188. [2020-10-12 19:58:18,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16188 states. [2020-10-12 19:58:18,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16188 states to 16188 states and 22772 transitions. [2020-10-12 19:58:18,191 INFO L78 Accepts]: Start accepts. Automaton has 16188 states and 22772 transitions. Word has length 77 [2020-10-12 19:58:18,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:58:18,191 INFO L479 AbstractCegarLoop]: Abstraction has 16188 states and 22772 transitions. [2020-10-12 19:58:18,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:58:18,191 INFO L276 IsEmpty]: Start isEmpty. Operand 16188 states and 22772 transitions. [2020-10-12 19:58:18,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 19:58:18,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:58:18,197 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:58:18,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 19:58:18,197 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:58:18,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:58:18,197 INFO L82 PathProgramCache]: Analyzing trace with hash 116579321, now seen corresponding path program 1 times [2020-10-12 19:58:18,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:58:18,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425807697] [2020-10-12 19:58:18,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:58:18,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:58:18,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:18,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:18,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:18,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:18,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:18,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:18,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:20,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:58:20,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 19:58:20,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:58:20,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2091 [2020-10-12 19:58:20,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:58:20,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:58:20,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:58:20,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-12 19:58:20,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:58:20,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:58:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:58:20,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:20,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:58:20,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:58:20,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:58:20,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:58:20,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:58:20,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:58:20,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:58:20,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:58:20,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:58:20,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:58:20,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425807697] [2020-10-12 19:58:20,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:58:20,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:58:20,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5633754] [2020-10-12 19:58:20,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:58:20,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:58:20,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:58:20,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:58:20,571 INFO L87 Difference]: Start difference. First operand 16188 states and 22772 transitions. Second operand 8 states. [2020-10-12 19:58:20,710 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-12 19:58:39,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:58:39,672 INFO L93 Difference]: Finished difference Result 75775 states and 105089 transitions. [2020-10-12 19:58:39,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:58:39,672 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2020-10-12 19:58:39,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:58:39,744 INFO L225 Difference]: With dead ends: 75775 [2020-10-12 19:58:39,744 INFO L226 Difference]: Without dead ends: 60292 [2020-10-12 19:58:39,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:58:39,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60292 states. [2020-10-12 19:58:49,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60292 to 30319. [2020-10-12 19:58:49,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30319 states. [2020-10-12 19:58:49,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30319 states to 30319 states and 42312 transitions. [2020-10-12 19:58:49,382 INFO L78 Accepts]: Start accepts. Automaton has 30319 states and 42312 transitions. Word has length 78 [2020-10-12 19:58:49,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:58:49,382 INFO L479 AbstractCegarLoop]: Abstraction has 30319 states and 42312 transitions. [2020-10-12 19:58:49,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:58:49,383 INFO L276 IsEmpty]: Start isEmpty. Operand 30319 states and 42312 transitions. [2020-10-12 19:58:49,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 19:58:49,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:58:49,388 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:58:49,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 19:58:49,388 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:58:49,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:58:49,388 INFO L82 PathProgramCache]: Analyzing trace with hash 625794886, now seen corresponding path program 1 times [2020-10-12 19:58:49,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:58:49,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710133527] [2020-10-12 19:58:49,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:58:49,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:58:49,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:49,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:49,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:49,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:49,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:58:49,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 19:58:49,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:58:49,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 480 [2020-10-12 19:58:49,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:58:49,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:58:49,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:58:49,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-12 19:58:49,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:58:50,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:58:50,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:58:50,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:50,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:58:50,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:58:50,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:58:50,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:58:50,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:58:50,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:58:50,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:58:50,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:58:50,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:58:50,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:58:50,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710133527] [2020-10-12 19:58:50,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:58:50,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:58:50,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695993235] [2020-10-12 19:58:50,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:58:50,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:58:50,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:58:50,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:58:50,033 INFO L87 Difference]: Start difference. First operand 30319 states and 42312 transitions. Second operand 6 states. [2020-10-12 19:58:50,173 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-12 19:59:08,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:59:08,491 INFO L93 Difference]: Finished difference Result 79017 states and 111185 transitions. [2020-10-12 19:59:08,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:59:08,492 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-10-12 19:59:08,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:59:08,570 INFO L225 Difference]: With dead ends: 79017 [2020-10-12 19:59:08,570 INFO L226 Difference]: Without dead ends: 64162 [2020-10-12 19:59:08,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:59:08,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64162 states. [2020-10-12 19:59:23,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64162 to 47786. [2020-10-12 19:59:23,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47786 states. [2020-10-12 19:59:23,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47786 states to 47786 states and 66771 transitions. [2020-10-12 19:59:23,326 INFO L78 Accepts]: Start accepts. Automaton has 47786 states and 66771 transitions. Word has length 78 [2020-10-12 19:59:23,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:59:23,326 INFO L479 AbstractCegarLoop]: Abstraction has 47786 states and 66771 transitions. [2020-10-12 19:59:23,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:59:23,326 INFO L276 IsEmpty]: Start isEmpty. Operand 47786 states and 66771 transitions. [2020-10-12 19:59:23,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 19:59:23,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:59:23,331 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:59:23,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 19:59:23,332 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:59:23,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:59:23,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1796221980, now seen corresponding path program 1 times [2020-10-12 19:59:23,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:59:23,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027499814] [2020-10-12 19:59:23,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:59:23,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:23,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:23,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:23,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:23,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:23,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:23,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:23,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:24,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:26,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:26,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 19:59:26,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:59:26,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2903 [2020-10-12 19:59:26,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:26,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:59:26,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:59:26,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 19:59:26,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:59:26,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:59:26,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:59:26,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:59:26,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:59:26,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:59:26,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:59:26,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:59:26,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:59:26,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:59:26,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:59:26,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:59:26,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:59:26,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:59:26,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027499814] [2020-10-12 19:59:26,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:59:26,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:59:26,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828609258] [2020-10-12 19:59:26,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:59:26,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:59:26,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:59:26,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:59:26,440 INFO L87 Difference]: Start difference. First operand 47786 states and 66771 transitions. Second operand 8 states. [2020-10-12 19:59:26,584 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 19:59:52,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:59:52,944 INFO L93 Difference]: Finished difference Result 98980 states and 136780 transitions. [2020-10-12 19:59:52,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:59:52,945 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2020-10-12 19:59:52,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:59:53,045 INFO L225 Difference]: With dead ends: 98980 [2020-10-12 19:59:53,045 INFO L226 Difference]: Without dead ends: 78919 [2020-10-12 19:59:53,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-12 19:59:53,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78919 states.