/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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/loops-crafted-1/in-de51.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:24:51,677 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:24:51,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:24:51,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:24:51,726 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:24:51,735 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:24:51,737 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:24:51,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:24:51,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:24:51,748 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:24:51,749 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:24:51,750 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:24:51,750 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:24:51,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:24:51,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:24:51,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:24:51,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:24:51,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:24:51,764 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:24:51,771 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:24:51,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:24:51,775 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:24:51,776 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:24:51,777 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:24:51,780 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:24:51,781 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:24:51,781 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:24:51,782 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:24:51,782 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:24:51,783 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:24:51,783 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:24:51,784 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:24:51,785 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:24:51,785 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:24:51,786 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:24:51,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:24:51,787 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:24:51,788 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:24:51,788 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:24:51,789 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:24:51,789 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:24:51,790 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 [2020-10-14 05:24:51,817 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:24:51,817 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:24:51,820 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:24:51,821 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:24:51,821 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:24:51,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:24:51,821 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:24:51,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:24:51,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:24:51,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:24:51,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:24:51,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:24:51,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:24:51,823 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:24:51,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:24:51,825 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:24:51,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:24:51,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:24:51,826 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:24:51,826 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:24:51,826 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:24:51,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:24:51,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:24:51,827 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:24:51,827 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:24:51,827 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:24:51,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:24:51,828 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:24:51,830 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:24:51,830 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:24:52,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:24:52,157 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:24:52,160 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:24:52,162 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:24:52,162 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:24:52,163 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de51.c [2020-10-14 05:24:52,228 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1bf23c0ca/2de3854fde77483a8a01f562ca2f9704/FLAG807f42d6e [2020-10-14 05:24:52,695 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:24:52,695 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de51.c [2020-10-14 05:24:52,701 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1bf23c0ca/2de3854fde77483a8a01f562ca2f9704/FLAG807f42d6e [2020-10-14 05:24:53,081 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1bf23c0ca/2de3854fde77483a8a01f562ca2f9704 [2020-10-14 05:24:53,092 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:24:53,094 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:24:53,095 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:24:53,095 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:24:53,099 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:24:53,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:24:53" (1/1) ... [2020-10-14 05:24:53,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@703d1064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:53, skipping insertion in model container [2020-10-14 05:24:53,103 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:24:53" (1/1) ... [2020-10-14 05:24:53,111 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:24:53,129 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:24:53,341 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:24:53,345 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:24:53,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:24:53,374 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:24:53,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:53 WrapperNode [2020-10-14 05:24:53,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:24:53,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:24:53,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:24:53,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:24:53,385 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:53" (1/1) ... [2020-10-14 05:24:53,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:53" (1/1) ... [2020-10-14 05:24:53,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:53" (1/1) ... [2020-10-14 05:24:53,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:53" (1/1) ... [2020-10-14 05:24:53,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:53" (1/1) ... [2020-10-14 05:24:53,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:53" (1/1) ... [2020-10-14 05:24:53,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:53" (1/1) ... [2020-10-14 05:24:53,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:24:53,501 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:24:53,501 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:24:53,501 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:24:53,502 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:53" (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 [2020-10-14 05:24:53,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:24:53,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:24:53,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:24:53,559 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:24:53,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:24:53,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-14 05:24:53,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:24:53,559 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:24:53,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:24:53,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:24:53,785 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:24:53,785 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-14 05:24:53,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:24:53 BoogieIcfgContainer [2020-10-14 05:24:53,790 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:24:53,791 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:24:53,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:24:53,795 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:24:53,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:24:53" (1/3) ... [2020-10-14 05:24:53,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@231f7e95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:24:53, skipping insertion in model container [2020-10-14 05:24:53,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:53" (2/3) ... [2020-10-14 05:24:53,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@231f7e95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:24:53, skipping insertion in model container [2020-10-14 05:24:53,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:24:53" (3/3) ... [2020-10-14 05:24:53,798 INFO L109 eAbstractionObserver]: Analyzing ICFG in-de51.c [2020-10-14 05:24:53,809 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:24:53,817 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:24:53,837 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:24:53,871 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:24:53,872 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:24:53,872 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:24:53,872 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:24:53,872 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:24:53,873 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:24:53,873 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:24:53,873 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:24:53,898 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-14 05:24:53,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 05:24:53,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:53,907 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:53,907 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:53,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:53,915 INFO L82 PathProgramCache]: Analyzing trace with hash -255424134, now seen corresponding path program 1 times [2020-10-14 05:24:53,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:53,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818013316] [2020-10-14 05:24:53,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:54,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:54,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:54,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:54,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 05:24:54,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:54,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-10-14 05:24:54,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:54,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:54,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:54,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 05:24:54,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:54,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-14 05:24:54,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:54,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:54,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:54,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:54,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:54,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:54,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 05:24:54,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:54,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:54,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:54,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:54,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:54,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:24:54,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:24:54,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818013316] [2020-10-14 05:24:54,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:24:54,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-14 05:24:54,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693790917] [2020-10-14 05:24:54,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-14 05:24:54,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:54,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-14 05:24:54,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 05:24:54,393 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-10-14 05:24:54,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:54,428 INFO L93 Difference]: Finished difference Result 40 states and 59 transitions. [2020-10-14 05:24:54,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-14 05:24:54,430 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-10-14 05:24:54,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:54,442 INFO L225 Difference]: With dead ends: 40 [2020-10-14 05:24:54,442 INFO L226 Difference]: Without dead ends: 16 [2020-10-14 05:24:54,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 05:24:54,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-14 05:24:54,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-14 05:24:54,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-14 05:24:54,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2020-10-14 05:24:54,492 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 15 [2020-10-14 05:24:54,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:54,493 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2020-10-14 05:24:54,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-14 05:24:54,493 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2020-10-14 05:24:54,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 05:24:54,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:54,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:54,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:24:54,495 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:54,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:54,496 INFO L82 PathProgramCache]: Analyzing trace with hash -369940738, now seen corresponding path program 1 times [2020-10-14 05:24:54,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:54,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736459187] [2020-10-14 05:24:54,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:54,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:54,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:54,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:54,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 05:24:54,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:54,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-14 05:24:54,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:54,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:54,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:24:54,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:54,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:24:54,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:54,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:54,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:54,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:54,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:54,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:54,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:24:54,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:54,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:54,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:54,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:54,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:54,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:24:54,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736459187] [2020-10-14 05:24:54,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:24:54,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 05:24:54,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767379385] [2020-10-14 05:24:54,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:24:54,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:54,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:24:54,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:24:54,762 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 5 states. [2020-10-14 05:24:54,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:54,866 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2020-10-14 05:24:54,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:24:54,868 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-14 05:24:54,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:54,870 INFO L225 Difference]: With dead ends: 27 [2020-10-14 05:24:54,870 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 05:24:54,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:24:54,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 05:24:54,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-14 05:24:54,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 05:24:54,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2020-10-14 05:24:54,887 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 15 [2020-10-14 05:24:54,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:54,888 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2020-10-14 05:24:54,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:24:54,888 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2020-10-14 05:24:54,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:24:54,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:54,889 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:54,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:24:54,890 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:54,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:54,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1439862098, now seen corresponding path program 1 times [2020-10-14 05:24:54,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:54,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659609314] [2020-10-14 05:24:54,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:54,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:54,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:55,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:55,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:24:55,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:55,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-14 05:24:55,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:55,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:55,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:24:55,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:24:55,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 05:24:55,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:55,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:55,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:55,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:55,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:55,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:55,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:55,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:24:55,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:55,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:55,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:55,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:55,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:55,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:55,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:24:55,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659609314] [2020-10-14 05:24:55,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:24:55,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:24:55,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565506374] [2020-10-14 05:24:55,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:24:55,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:55,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:24:55,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:24:55,053 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand 3 states. [2020-10-14 05:24:55,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:55,092 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2020-10-14 05:24:55,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:24:55,094 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-14 05:24:55,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:55,097 INFO L225 Difference]: With dead ends: 34 [2020-10-14 05:24:55,097 INFO L226 Difference]: Without dead ends: 27 [2020-10-14 05:24:55,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:24:55,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-14 05:24:55,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-14 05:24:55,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 05:24:55,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2020-10-14 05:24:55,131 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 16 [2020-10-14 05:24:55,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:55,132 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2020-10-14 05:24:55,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:24:55,132 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2020-10-14 05:24:55,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:24:55,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:55,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:55,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:24:55,135 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:55,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:55,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1452276799, now seen corresponding path program 1 times [2020-10-14 05:24:55,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:55,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385809261] [2020-10-14 05:24:55,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:55,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:55,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:55,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:55,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:55,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:24:55,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:24:55,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-14 05:24:55,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:55,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:55,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:24:55,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:24:55,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 05:24:55,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:55,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:55,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:55,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:55,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:55,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:55,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:55,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:24:55,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:55,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:55,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:55,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:55,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:55,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:24:55,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385809261] [2020-10-14 05:24:55,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:24:55,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:24:55,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566888694] [2020-10-14 05:24:55,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:24:55,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:55,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:24:55,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:24:55,356 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 3 states. [2020-10-14 05:24:55,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:55,383 INFO L93 Difference]: Finished difference Result 39 states and 53 transitions. [2020-10-14 05:24:55,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:24:55,383 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-14 05:24:55,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:55,385 INFO L225 Difference]: With dead ends: 39 [2020-10-14 05:24:55,386 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 05:24:55,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:24:55,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 05:24:55,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-14 05:24:55,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 05:24:55,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2020-10-14 05:24:55,394 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 16 [2020-10-14 05:24:55,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:55,394 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2020-10-14 05:24:55,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:24:55,395 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2020-10-14 05:24:55,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:24:55,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:55,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:55,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:24:55,396 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:55,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:55,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1403494194, now seen corresponding path program 1 times [2020-10-14 05:24:55,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:55,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067164479] [2020-10-14 05:24:55,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:55,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:55,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:55,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:55,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:55,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:55,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:55,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:24:55,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:24:55,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-14 05:24:55,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:55,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:55,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:24:55,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:24:55,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:24:55,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:55,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:55,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:55,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:55,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:55,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:55,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:55,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:24:55,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:55,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:55,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:55,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:55,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:55,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:55,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:24:55,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067164479] [2020-10-14 05:24:55,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:55,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:24:55,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870478807] [2020-10-14 05:24:55,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:24:55,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:55,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:24:55,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:24:55,671 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 4 states. [2020-10-14 05:24:55,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:55,713 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2020-10-14 05:24:55,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:24:55,714 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-14 05:24:55,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:55,715 INFO L225 Difference]: With dead ends: 47 [2020-10-14 05:24:55,715 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 05:24:55,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:24:55,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 05:24:55,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-10-14 05:24:55,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 05:24:55,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 51 transitions. [2020-10-14 05:24:55,724 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 51 transitions. Word has length 16 [2020-10-14 05:24:55,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:55,724 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 51 transitions. [2020-10-14 05:24:55,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:24:55,725 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 51 transitions. [2020-10-14 05:24:55,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:24:55,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:55,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:55,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:24:55,726 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:55,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:55,727 INFO L82 PathProgramCache]: Analyzing trace with hash -436127603, now seen corresponding path program 1 times [2020-10-14 05:24:55,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:55,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719630306] [2020-10-14 05:24:55,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:55,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:55,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:55,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:55,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:55,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:24:55,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:24:55,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-14 05:24:55,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:55,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:55,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:24:55,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:55,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:24:55,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:55,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:55,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:55,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:55,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:55,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:55,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:55,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:55,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:55,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:55,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:55,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:55,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:55,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:24:55,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719630306] [2020-10-14 05:24:55,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:55,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:24:55,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160109632] [2020-10-14 05:24:55,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:24:55,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:55,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:24:55,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:24:55,906 INFO L87 Difference]: Start difference. First operand 36 states and 51 transitions. Second operand 5 states. [2020-10-14 05:24:55,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:55,996 INFO L93 Difference]: Finished difference Result 78 states and 117 transitions. [2020-10-14 05:24:55,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:24:55,997 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-14 05:24:55,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:55,998 INFO L225 Difference]: With dead ends: 78 [2020-10-14 05:24:55,998 INFO L226 Difference]: Without dead ends: 57 [2020-10-14 05:24:55,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:24:56,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-14 05:24:56,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-10-14 05:24:56,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-14 05:24:56,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 63 transitions. [2020-10-14 05:24:56,014 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 63 transitions. Word has length 16 [2020-10-14 05:24:56,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:56,015 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 63 transitions. [2020-10-14 05:24:56,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:24:56,015 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 63 transitions. [2020-10-14 05:24:56,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 05:24:56,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:56,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:56,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:24:56,019 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:56,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:56,019 INFO L82 PathProgramCache]: Analyzing trace with hash 879719134, now seen corresponding path program 1 times [2020-10-14 05:24:56,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:56,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274282563] [2020-10-14 05:24:56,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:56,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:56,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:56,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:56,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:56,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:56,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:56,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 05:24:56,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:24:56,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-10-14 05:24:56,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:56,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:56,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:24:56,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:56,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 05:24:56,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:56,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:56,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:56,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:56,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:56,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:56,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:56,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:56,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:56,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:56,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:56,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:56,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:56,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:56,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:24:56,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274282563] [2020-10-14 05:24:56,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:24:56,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 05:24:56,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237878055] [2020-10-14 05:24:56,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:24:56,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:56,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:24:56,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:24:56,358 INFO L87 Difference]: Start difference. First operand 45 states and 63 transitions. Second operand 4 states. [2020-10-14 05:24:56,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:56,410 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2020-10-14 05:24:56,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:24:56,411 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-14 05:24:56,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:56,412 INFO L225 Difference]: With dead ends: 53 [2020-10-14 05:24:56,412 INFO L226 Difference]: Without dead ends: 39 [2020-10-14 05:24:56,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:24:56,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-14 05:24:56,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-14 05:24:56,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 05:24:56,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 54 transitions. [2020-10-14 05:24:56,430 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 54 transitions. Word has length 17 [2020-10-14 05:24:56,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:56,430 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 54 transitions. [2020-10-14 05:24:56,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:24:56,431 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 54 transitions. [2020-10-14 05:24:56,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 05:24:56,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:56,432 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:56,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:24:56,432 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:56,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:56,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1807046878, now seen corresponding path program 2 times [2020-10-14 05:24:56,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:56,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249955339] [2020-10-14 05:24:56,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:56,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:56,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:56,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:56,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:56,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:56,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 05:24:56,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:24:56,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-14 05:24:56,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:56,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:56,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:24:56,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:56,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:24:56,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:56,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:56,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:56,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:56,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:56,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:56,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:56,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:24:56,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:56,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:56,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:56,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:56,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:56,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:56,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:24:56,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249955339] [2020-10-14 05:24:56,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:56,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:24:56,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550865855] [2020-10-14 05:24:56,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:24:56,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:56,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:24:56,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:24:56,753 INFO L87 Difference]: Start difference. First operand 39 states and 54 transitions. Second operand 6 states. [2020-10-14 05:24:56,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:56,904 INFO L93 Difference]: Finished difference Result 77 states and 114 transitions. [2020-10-14 05:24:56,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:24:56,905 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-14 05:24:56,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:56,906 INFO L225 Difference]: With dead ends: 77 [2020-10-14 05:24:56,907 INFO L226 Difference]: Without dead ends: 60 [2020-10-14 05:24:56,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:24:56,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-14 05:24:56,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2020-10-14 05:24:56,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 05:24:56,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 64 transitions. [2020-10-14 05:24:56,926 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 64 transitions. Word has length 17 [2020-10-14 05:24:56,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:56,927 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 64 transitions. [2020-10-14 05:24:56,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:24:56,927 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 64 transitions. [2020-10-14 05:24:56,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:24:56,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:56,929 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:56,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:24:56,929 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:56,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:56,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1668988243, now seen corresponding path program 3 times [2020-10-14 05:24:56,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:56,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909065027] [2020-10-14 05:24:56,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:56,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:56,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:56,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:56,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:57,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:57,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 05:24:57,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:24:57,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-14 05:24:57,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:57,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:57,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:24:57,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:57,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:24:57,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:57,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:57,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:57,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:57,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:57,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:57,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:57,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:57,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:57,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:57,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:57,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:57,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:57,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:24:57,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909065027] [2020-10-14 05:24:57,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:57,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:24:57,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672419719] [2020-10-14 05:24:57,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:24:57,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:57,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:24:57,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:24:57,183 INFO L87 Difference]: Start difference. First operand 46 states and 64 transitions. Second operand 7 states. [2020-10-14 05:24:57,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:57,321 INFO L93 Difference]: Finished difference Result 89 states and 133 transitions. [2020-10-14 05:24:57,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:24:57,322 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-14 05:24:57,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:57,323 INFO L225 Difference]: With dead ends: 89 [2020-10-14 05:24:57,323 INFO L226 Difference]: Without dead ends: 72 [2020-10-14 05:24:57,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:24:57,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-14 05:24:57,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-10-14 05:24:57,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 05:24:57,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 74 transitions. [2020-10-14 05:24:57,332 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 74 transitions. Word has length 18 [2020-10-14 05:24:57,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:57,332 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 74 transitions. [2020-10-14 05:24:57,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:24:57,332 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 74 transitions. [2020-10-14 05:24:57,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 05:24:57,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:57,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:57,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:24:57,334 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:57,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:57,334 INFO L82 PathProgramCache]: Analyzing trace with hash 2055309710, now seen corresponding path program 1 times [2020-10-14 05:24:57,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:57,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485621043] [2020-10-14 05:24:57,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:57,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:57,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:57,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:57,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:57,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 05:24:57,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:57,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-14 05:24:57,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:57,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:57,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:24:57,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 05:24:57,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:24:57,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:57,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:57,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:57,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:57,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:57,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:57,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:57,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:57,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:57,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:57,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:57,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:57,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:57,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:57,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:24:57,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485621043] [2020-10-14 05:24:57,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:57,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:24:57,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043005194] [2020-10-14 05:24:57,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:24:57,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:57,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:24:57,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:24:57,478 INFO L87 Difference]: Start difference. First operand 53 states and 74 transitions. Second operand 4 states. [2020-10-14 05:24:57,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:57,528 INFO L93 Difference]: Finished difference Result 74 states and 100 transitions. [2020-10-14 05:24:57,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:24:57,528 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-14 05:24:57,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:57,530 INFO L225 Difference]: With dead ends: 74 [2020-10-14 05:24:57,530 INFO L226 Difference]: Without dead ends: 69 [2020-10-14 05:24:57,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:24:57,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-14 05:24:57,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2020-10-14 05:24:57,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-14 05:24:57,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 89 transitions. [2020-10-14 05:24:57,538 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 89 transitions. Word has length 19 [2020-10-14 05:24:57,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:57,539 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 89 transitions. [2020-10-14 05:24:57,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:24:57,539 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 89 transitions. [2020-10-14 05:24:57,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 05:24:57,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:57,540 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:57,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 05:24:57,541 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:57,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:57,541 INFO L82 PathProgramCache]: Analyzing trace with hash -2051894594, now seen corresponding path program 4 times [2020-10-14 05:24:57,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:57,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176976090] [2020-10-14 05:24:57,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:57,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:57,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:57,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:57,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:57,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:57,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 05:24:57,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:24:57,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 350 [2020-10-14 05:24:57,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:57,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:57,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:24:57,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:57,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:24:57,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:58,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:58,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:58,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:58,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:58,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:58,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:24:58,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:58,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:58,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:58,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:58,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:58,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:58,010 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:24:58,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176976090] [2020-10-14 05:24:58,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:58,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:24:58,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624171665] [2020-10-14 05:24:58,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:24:58,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:58,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:24:58,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:24:58,012 INFO L87 Difference]: Start difference. First operand 64 states and 89 transitions. Second operand 8 states. [2020-10-14 05:24:58,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:58,193 INFO L93 Difference]: Finished difference Result 128 states and 190 transitions. [2020-10-14 05:24:58,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:24:58,194 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-14 05:24:58,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:58,195 INFO L225 Difference]: With dead ends: 128 [2020-10-14 05:24:58,195 INFO L226 Difference]: Without dead ends: 106 [2020-10-14 05:24:58,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:24:58,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-14 05:24:58,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 71. [2020-10-14 05:24:58,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-14 05:24:58,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 99 transitions. [2020-10-14 05:24:58,204 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 99 transitions. Word has length 19 [2020-10-14 05:24:58,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:58,204 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 99 transitions. [2020-10-14 05:24:58,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:24:58,205 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 99 transitions. [2020-10-14 05:24:58,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:24:58,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:58,206 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] [2020-10-14 05:24:58,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 05:24:58,206 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:58,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:58,206 INFO L82 PathProgramCache]: Analyzing trace with hash -674370641, now seen corresponding path program 1 times [2020-10-14 05:24:58,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:58,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827126802] [2020-10-14 05:24:58,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:58,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:58,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:58,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:58,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:58,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:24:58,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:58,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-10-14 05:24:58,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:58,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:58,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:24:58,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:58,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:24:58,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:58,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:58,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:58,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:58,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:58,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:58,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:58,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:58,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:58,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:58,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:58,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:58,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:24:58,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827126802] [2020-10-14 05:24:58,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:58,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:24:58,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633634906] [2020-10-14 05:24:58,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:24:58,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:58,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:24:58,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:24:58,793 INFO L87 Difference]: Start difference. First operand 71 states and 99 transitions. Second operand 9 states. [2020-10-14 05:24:59,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:59,104 INFO L93 Difference]: Finished difference Result 92 states and 126 transitions. [2020-10-14 05:24:59,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:24:59,104 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-14 05:24:59,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:59,105 INFO L225 Difference]: With dead ends: 92 [2020-10-14 05:24:59,105 INFO L226 Difference]: Without dead ends: 80 [2020-10-14 05:24:59,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:24:59,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-14 05:24:59,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2020-10-14 05:24:59,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-14 05:24:59,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 104 transitions. [2020-10-14 05:24:59,114 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 104 transitions. Word has length 20 [2020-10-14 05:24:59,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:59,114 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 104 transitions. [2020-10-14 05:24:59,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:24:59,115 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 104 transitions. [2020-10-14 05:24:59,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:24:59,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:59,116 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:59,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 05:24:59,116 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:59,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:59,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1037089587, now seen corresponding path program 5 times [2020-10-14 05:24:59,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:59,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788942679] [2020-10-14 05:24:59,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:59,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:59,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:59,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:59,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:59,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:59,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:24:59,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:24:59,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 402 [2020-10-14 05:24:59,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:59,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:59,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:24:59,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:59,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:24:59,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:59,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:59,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:59,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:59,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:59,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:59,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:59,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:59,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:59,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:59,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:59,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:59,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:59,632 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:24:59,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788942679] [2020-10-14 05:24:59,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:59,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:24:59,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274212820] [2020-10-14 05:24:59,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:24:59,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:59,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:24:59,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:24:59,635 INFO L87 Difference]: Start difference. First operand 75 states and 104 transitions. Second operand 9 states. [2020-10-14 05:24:59,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:59,857 INFO L93 Difference]: Finished difference Result 151 states and 222 transitions. [2020-10-14 05:24:59,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:24:59,858 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-14 05:24:59,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:59,859 INFO L225 Difference]: With dead ends: 151 [2020-10-14 05:24:59,860 INFO L226 Difference]: Without dead ends: 129 [2020-10-14 05:24:59,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:24:59,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-14 05:24:59,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 82. [2020-10-14 05:24:59,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-14 05:24:59,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 114 transitions. [2020-10-14 05:24:59,868 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 114 transitions. Word has length 20 [2020-10-14 05:24:59,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:59,869 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 114 transitions. [2020-10-14 05:24:59,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:24:59,869 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 114 transitions. [2020-10-14 05:24:59,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 05:24:59,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:59,870 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:59,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 05:24:59,870 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:59,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:59,871 INFO L82 PathProgramCache]: Analyzing trace with hash 604884398, now seen corresponding path program 2 times [2020-10-14 05:24:59,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:59,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868610384] [2020-10-14 05:24:59,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:59,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:59,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:59,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:00,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:00,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 05:25:00,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:00,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 268 [2020-10-14 05:25:00,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:00,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:00,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:25:00,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 05:25:00,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:25:00,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:00,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:00,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:00,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:00,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:00,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:00,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:00,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:00,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:00,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:00,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:00,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:00,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:00,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:00,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:25:00,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868610384] [2020-10-14 05:25:00,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:00,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:25:00,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305010906] [2020-10-14 05:25:00,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:25:00,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:00,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:25:00,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:25:00,193 INFO L87 Difference]: Start difference. First operand 82 states and 114 transitions. Second operand 4 states. [2020-10-14 05:25:00,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:00,232 INFO L93 Difference]: Finished difference Result 102 states and 135 transitions. [2020-10-14 05:25:00,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:25:00,233 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-14 05:25:00,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:00,234 INFO L225 Difference]: With dead ends: 102 [2020-10-14 05:25:00,234 INFO L226 Difference]: Without dead ends: 83 [2020-10-14 05:25:00,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:25:00,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-14 05:25:00,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 70. [2020-10-14 05:25:00,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 05:25:00,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 98 transitions. [2020-10-14 05:25:00,242 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 98 transitions. Word has length 21 [2020-10-14 05:25:00,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:00,242 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 98 transitions. [2020-10-14 05:25:00,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:25:00,243 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 98 transitions. [2020-10-14 05:25:00,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 05:25:00,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:00,244 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:00,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 05:25:00,244 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:00,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:00,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1621002398, now seen corresponding path program 2 times [2020-10-14 05:25:00,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:00,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150837841] [2020-10-14 05:25:00,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:00,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:00,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:00,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:00,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:00,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:00,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:00,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 05:25:00,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:25:00,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 564 [2020-10-14 05:25:00,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:00,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:00,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:25:00,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:25:00,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:25:00,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:00,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:00,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:00,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:00,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:00,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:00,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:00,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:00,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:00,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:00,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:00,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:00,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:00,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-14 05:25:00,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150837841] [2020-10-14 05:25:00,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:00,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:25:00,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486560399] [2020-10-14 05:25:00,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:25:00,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:00,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:25:00,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:25:00,871 INFO L87 Difference]: Start difference. First operand 70 states and 98 transitions. Second operand 5 states. [2020-10-14 05:25:00,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:00,918 INFO L93 Difference]: Finished difference Result 100 states and 132 transitions. [2020-10-14 05:25:00,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:25:00,918 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-14 05:25:00,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:00,919 INFO L225 Difference]: With dead ends: 100 [2020-10-14 05:25:00,920 INFO L226 Difference]: Without dead ends: 95 [2020-10-14 05:25:00,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:25:00,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-14 05:25:00,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 83. [2020-10-14 05:25:00,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-14 05:25:00,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 115 transitions. [2020-10-14 05:25:00,926 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 115 transitions. Word has length 21 [2020-10-14 05:25:00,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:00,926 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 115 transitions. [2020-10-14 05:25:00,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:25:00,927 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 115 transitions. [2020-10-14 05:25:00,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 05:25:00,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:00,928 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:00,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 05:25:00,928 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:00,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:00,928 INFO L82 PathProgramCache]: Analyzing trace with hash 357094558, now seen corresponding path program 6 times [2020-10-14 05:25:00,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:00,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830806827] [2020-10-14 05:25:00,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:00,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:01,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:01,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:01,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:01,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 05:25:01,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:01,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 456 [2020-10-14 05:25:01,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:01,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:01,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:25:01,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:01,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:25:01,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:01,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:01,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:01,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:01,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:01,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:01,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:01,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:01,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:01,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:01,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:01,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:01,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:01,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:01,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830806827] [2020-10-14 05:25:01,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:01,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:25:01,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622886489] [2020-10-14 05:25:01,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:25:01,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:01,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:25:01,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:25:01,523 INFO L87 Difference]: Start difference. First operand 83 states and 115 transitions. Second operand 10 states. [2020-10-14 05:25:01,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:01,791 INFO L93 Difference]: Finished difference Result 166 states and 247 transitions. [2020-10-14 05:25:01,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:25:01,792 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-14 05:25:01,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:01,793 INFO L225 Difference]: With dead ends: 166 [2020-10-14 05:25:01,793 INFO L226 Difference]: Without dead ends: 139 [2020-10-14 05:25:01,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:25:01,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-14 05:25:01,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 90. [2020-10-14 05:25:01,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-14 05:25:01,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 125 transitions. [2020-10-14 05:25:01,807 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 125 transitions. Word has length 21 [2020-10-14 05:25:01,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:01,808 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 125 transitions. [2020-10-14 05:25:01,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:25:01,808 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 125 transitions. [2020-10-14 05:25:01,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:25:01,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:01,811 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:01,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 05:25:01,812 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:01,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:01,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1252995425, now seen corresponding path program 3 times [2020-10-14 05:25:01,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:01,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140070426] [2020-10-14 05:25:01,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:01,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:01,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:01,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:01,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:02,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:02,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:02,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:25:02,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:25:02,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 578 [2020-10-14 05:25:02,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:02,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:02,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:25:02,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 05:25:02,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:25:02,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:02,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:02,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:02,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:02,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:02,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:02,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:02,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:02,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:02,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:02,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:02,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:02,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:02,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:25:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 05:25:02,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140070426] [2020-10-14 05:25:02,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:02,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:25:02,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355283393] [2020-10-14 05:25:02,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:25:02,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:02,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:25:02,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:25:02,492 INFO L87 Difference]: Start difference. First operand 90 states and 125 transitions. Second operand 5 states. [2020-10-14 05:25:02,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:02,613 INFO L93 Difference]: Finished difference Result 116 states and 152 transitions. [2020-10-14 05:25:02,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:25:02,614 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-14 05:25:02,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:02,616 INFO L225 Difference]: With dead ends: 116 [2020-10-14 05:25:02,616 INFO L226 Difference]: Without dead ends: 111 [2020-10-14 05:25:02,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:02,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-14 05:25:02,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 91. [2020-10-14 05:25:02,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-14 05:25:02,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 126 transitions. [2020-10-14 05:25:02,624 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 126 transitions. Word has length 22 [2020-10-14 05:25:02,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:02,625 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 126 transitions. [2020-10-14 05:25:02,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:25:02,626 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 126 transitions. [2020-10-14 05:25:02,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:25:02,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:02,627 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:02,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 05:25:02,627 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:02,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:02,628 INFO L82 PathProgramCache]: Analyzing trace with hash 627130093, now seen corresponding path program 7 times [2020-10-14 05:25:02,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:02,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974163477] [2020-10-14 05:25:02,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:02,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:02,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:02,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:02,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:02,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:02,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:25:02,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:02,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 341 [2020-10-14 05:25:02,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:02,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:02,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:25:02,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:02,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 05:25:02,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:03,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:03,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:03,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:03,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:03,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:03,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:03,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:03,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:03,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:03,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:03,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:03,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:03,121 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:03,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974163477] [2020-10-14 05:25:03,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:03,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:25:03,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168419462] [2020-10-14 05:25:03,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:25:03,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:03,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:25:03,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:25:03,127 INFO L87 Difference]: Start difference. First operand 91 states and 126 transitions. Second operand 11 states. [2020-10-14 05:25:03,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:03,544 INFO L93 Difference]: Finished difference Result 190 states and 279 transitions. [2020-10-14 05:25:03,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:25:03,545 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-14 05:25:03,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:03,547 INFO L225 Difference]: With dead ends: 190 [2020-10-14 05:25:03,549 INFO L226 Difference]: Without dead ends: 162 [2020-10-14 05:25:03,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:25:03,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-14 05:25:03,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 98. [2020-10-14 05:25:03,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-14 05:25:03,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 136 transitions. [2020-10-14 05:25:03,565 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 136 transitions. Word has length 22 [2020-10-14 05:25:03,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:03,565 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 136 transitions. [2020-10-14 05:25:03,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:25:03,566 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 136 transitions. [2020-10-14 05:25:03,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 05:25:03,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:03,570 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:03,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 05:25:03,571 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:03,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:03,571 INFO L82 PathProgramCache]: Analyzing trace with hash -152614722, now seen corresponding path program 4 times [2020-10-14 05:25:03,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:03,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126414237] [2020-10-14 05:25:03,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:03,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:03,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:03,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:03,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:04,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:04,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:05,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:05,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 05:25:05,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:25:05,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1552 [2020-10-14 05:25:05,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:05,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:05,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:25:05,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 05:25:05,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:25:05,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:05,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:05,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:05,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:05,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:05,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:05,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:05,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:05,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:05,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:05,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:05,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:05,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:05,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:05,268 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 05:25:05,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126414237] [2020-10-14 05:25:05,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:05,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:25:05,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818752173] [2020-10-14 05:25:05,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:25:05,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:05,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:25:05,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:05,271 INFO L87 Difference]: Start difference. First operand 98 states and 136 transitions. Second operand 8 states. [2020-10-14 05:25:07,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:07,585 INFO L93 Difference]: Finished difference Result 132 states and 173 transitions. [2020-10-14 05:25:07,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:25:07,585 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-14 05:25:07,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:07,587 INFO L225 Difference]: With dead ends: 132 [2020-10-14 05:25:07,587 INFO L226 Difference]: Without dead ends: 121 [2020-10-14 05:25:07,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:25:07,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-14 05:25:07,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 98. [2020-10-14 05:25:07,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-14 05:25:07,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 135 transitions. [2020-10-14 05:25:07,596 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 135 transitions. Word has length 23 [2020-10-14 05:25:07,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:07,596 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 135 transitions. [2020-10-14 05:25:07,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:25:07,596 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 135 transitions. [2020-10-14 05:25:07,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 05:25:07,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:07,597 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:07,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 05:25:07,597 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:07,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:07,598 INFO L82 PathProgramCache]: Analyzing trace with hash -788451554, now seen corresponding path program 1 times [2020-10-14 05:25:07,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:07,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180451334] [2020-10-14 05:25:07,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:07,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:07,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:07,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:07,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:07,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:07,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 05:25:07,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:07,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 307 [2020-10-14 05:25:07,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:07,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:07,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:25:07,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:25:07,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:25:07,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:07,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:07,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:07,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:07,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:07,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:07,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:07,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:07,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:07,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:07,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:07,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:07,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:07,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:07,980 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 05:25:07,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180451334] [2020-10-14 05:25:07,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:07,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:25:07,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803384480] [2020-10-14 05:25:07,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:25:07,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:07,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:25:07,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:25:07,983 INFO L87 Difference]: Start difference. First operand 98 states and 135 transitions. Second operand 5 states. [2020-10-14 05:25:08,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:08,157 INFO L93 Difference]: Finished difference Result 151 states and 214 transitions. [2020-10-14 05:25:08,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:25:08,159 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-14 05:25:08,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:08,160 INFO L225 Difference]: With dead ends: 151 [2020-10-14 05:25:08,160 INFO L226 Difference]: Without dead ends: 141 [2020-10-14 05:25:08,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:08,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-14 05:25:08,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2020-10-14 05:25:08,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-14 05:25:08,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 160 transitions. [2020-10-14 05:25:08,174 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 160 transitions. Word has length 23 [2020-10-14 05:25:08,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:08,174 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 160 transitions. [2020-10-14 05:25:08,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:25:08,175 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 160 transitions. [2020-10-14 05:25:08,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 05:25:08,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:08,177 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:08,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 05:25:08,177 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:08,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:08,178 INFO L82 PathProgramCache]: Analyzing trace with hash -570639538, now seen corresponding path program 3 times [2020-10-14 05:25:08,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:08,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324469218] [2020-10-14 05:25:08,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:08,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:08,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:08,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:08,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:08,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:08,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:08,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 05:25:08,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:25:08,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 742 [2020-10-14 05:25:08,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:08,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:08,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:25:08,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 05:25:08,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:25:08,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:09,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:09,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:09,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:09,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:09,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:09,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:09,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:09,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:09,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:09,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:09,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:09,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:09,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 05:25:09,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324469218] [2020-10-14 05:25:09,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:09,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:25:09,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725851187] [2020-10-14 05:25:09,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:25:09,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:09,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:25:09,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:09,056 INFO L87 Difference]: Start difference. First operand 113 states and 160 transitions. Second operand 8 states. [2020-10-14 05:25:09,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:09,314 INFO L93 Difference]: Finished difference Result 151 states and 202 transitions. [2020-10-14 05:25:09,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:25:09,314 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-14 05:25:09,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:09,316 INFO L225 Difference]: With dead ends: 151 [2020-10-14 05:25:09,316 INFO L226 Difference]: Without dead ends: 146 [2020-10-14 05:25:09,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:25:09,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-14 05:25:09,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-10-14 05:25:09,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-14 05:25:09,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 169 transitions. [2020-10-14 05:25:09,328 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 169 transitions. Word has length 23 [2020-10-14 05:25:09,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:09,328 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 169 transitions. [2020-10-14 05:25:09,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:25:09,328 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 169 transitions. [2020-10-14 05:25:09,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 05:25:09,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:09,329 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:09,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 05:25:09,329 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:09,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:09,330 INFO L82 PathProgramCache]: Analyzing trace with hash 408297086, now seen corresponding path program 8 times [2020-10-14 05:25:09,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:09,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980065354] [2020-10-14 05:25:09,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:09,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:09,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:09,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:09,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:09,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:09,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 05:25:09,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:09,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 423 [2020-10-14 05:25:09,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:09,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:09,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:25:09,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:09,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:25:09,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:09,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:09,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:09,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:09,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:09,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:09,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:09,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:09,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:09,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:09,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:09,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:09,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:09,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980065354] [2020-10-14 05:25:09,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:09,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:25:09,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476468035] [2020-10-14 05:25:09,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:25:09,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:09,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:25:09,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:25:09,937 INFO L87 Difference]: Start difference. First operand 120 states and 169 transitions. Second operand 12 states. [2020-10-14 05:25:10,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:10,391 INFO L93 Difference]: Finished difference Result 262 states and 391 transitions. [2020-10-14 05:25:10,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:25:10,392 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-10-14 05:25:10,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:10,393 INFO L225 Difference]: With dead ends: 262 [2020-10-14 05:25:10,394 INFO L226 Difference]: Without dead ends: 230 [2020-10-14 05:25:10,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:25:10,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-14 05:25:10,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 128. [2020-10-14 05:25:10,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-14 05:25:10,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 181 transitions. [2020-10-14 05:25:10,407 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 181 transitions. Word has length 23 [2020-10-14 05:25:10,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:10,407 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 181 transitions. [2020-10-14 05:25:10,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:25:10,407 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 181 transitions. [2020-10-14 05:25:10,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:25:10,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:10,408 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:10,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 05:25:10,408 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:10,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:10,409 INFO L82 PathProgramCache]: Analyzing trace with hash -400551297, now seen corresponding path program 5 times [2020-10-14 05:25:10,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:10,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870934887] [2020-10-14 05:25:10,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:10,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:10,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:10,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:10,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:11,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:25:11,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:11,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 591 [2020-10-14 05:25:11,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:11,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:11,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:25:11,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:25:11,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:25:11,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:11,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:11,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:11,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:11,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:11,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:11,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:11,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:11,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:11,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:11,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:11,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:11,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:11,061 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-14 05:25:11,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870934887] [2020-10-14 05:25:11,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:11,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:25:11,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794435144] [2020-10-14 05:25:11,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:25:11,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:11,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:25:11,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:25:11,067 INFO L87 Difference]: Start difference. First operand 128 states and 181 transitions. Second operand 5 states. [2020-10-14 05:25:11,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:11,117 INFO L93 Difference]: Finished difference Result 168 states and 222 transitions. [2020-10-14 05:25:11,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:25:11,117 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-14 05:25:11,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:11,119 INFO L225 Difference]: With dead ends: 168 [2020-10-14 05:25:11,119 INFO L226 Difference]: Without dead ends: 154 [2020-10-14 05:25:11,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:25:11,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-14 05:25:11,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 122. [2020-10-14 05:25:11,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-14 05:25:11,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 172 transitions. [2020-10-14 05:25:11,130 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 172 transitions. Word has length 24 [2020-10-14 05:25:11,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:11,131 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 172 transitions. [2020-10-14 05:25:11,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:25:11,131 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 172 transitions. [2020-10-14 05:25:11,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:25:11,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:11,132 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:11,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 05:25:11,132 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:11,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:11,132 INFO L82 PathProgramCache]: Analyzing trace with hash 861703886, now seen corresponding path program 6 times [2020-10-14 05:25:11,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:11,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080486658] [2020-10-14 05:25:11,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:11,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:11,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:25:11,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:11,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 397 [2020-10-14 05:25:11,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:11,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:11,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:25:11,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:25:11,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:25:11,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:11,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:11,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:11,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:11,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:11,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:11,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:11,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:11,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:11,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:11,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:11,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:11,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 05:25:11,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080486658] [2020-10-14 05:25:11,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:11,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:25:11,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159738192] [2020-10-14 05:25:11,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:25:11,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:11,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:25:11,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:25:11,603 INFO L87 Difference]: Start difference. First operand 122 states and 172 transitions. Second operand 5 states. [2020-10-14 05:25:11,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:11,713 INFO L93 Difference]: Finished difference Result 160 states and 222 transitions. [2020-10-14 05:25:11,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:25:11,714 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-14 05:25:11,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:11,716 INFO L225 Difference]: With dead ends: 160 [2020-10-14 05:25:11,716 INFO L226 Difference]: Without dead ends: 151 [2020-10-14 05:25:11,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:11,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-14 05:25:11,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 136. [2020-10-14 05:25:11,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-14 05:25:11,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 187 transitions. [2020-10-14 05:25:11,743 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 187 transitions. Word has length 24 [2020-10-14 05:25:11,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:11,744 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 187 transitions. [2020-10-14 05:25:11,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:25:11,744 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 187 transitions. [2020-10-14 05:25:11,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:25:11,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:11,745 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:11,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 05:25:11,746 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:11,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:11,746 INFO L82 PathProgramCache]: Analyzing trace with hash 225867054, now seen corresponding path program 2 times [2020-10-14 05:25:11,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:11,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795867995] [2020-10-14 05:25:11,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:11,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:12,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:12,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:12,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:25:12,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:25:12,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 912 [2020-10-14 05:25:12,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:12,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:12,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:25:12,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:25:12,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:25:12,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:12,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:12,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:12,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:12,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:12,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:12,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:12,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:12,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:12,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:12,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:12,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:12,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:12,730 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 05:25:12,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795867995] [2020-10-14 05:25:12,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:12,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:25:12,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39026805] [2020-10-14 05:25:12,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:25:12,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:12,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:25:12,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:25:12,732 INFO L87 Difference]: Start difference. First operand 136 states and 187 transitions. Second operand 6 states. [2020-10-14 05:25:12,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:12,847 INFO L93 Difference]: Finished difference Result 194 states and 274 transitions. [2020-10-14 05:25:12,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:25:12,848 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-14 05:25:12,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:12,849 INFO L225 Difference]: With dead ends: 194 [2020-10-14 05:25:12,849 INFO L226 Difference]: Without dead ends: 179 [2020-10-14 05:25:12,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:25:12,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-14 05:25:12,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 165. [2020-10-14 05:25:12,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-14 05:25:12,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 227 transitions. [2020-10-14 05:25:12,865 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 227 transitions. Word has length 24 [2020-10-14 05:25:12,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:12,866 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 227 transitions. [2020-10-14 05:25:12,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:25:12,866 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 227 transitions. [2020-10-14 05:25:12,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:25:12,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:12,867 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:12,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 05:25:12,867 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:12,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:12,867 INFO L82 PathProgramCache]: Analyzing trace with hash -474418705, now seen corresponding path program 7 times [2020-10-14 05:25:12,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:12,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025862220] [2020-10-14 05:25:12,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:12,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:12,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:12,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:13,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:13,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:13,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:13,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:25:13,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:25:13,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 696 [2020-10-14 05:25:13,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:13,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:13,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:25:13,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 05:25:13,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:25:13,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:13,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:13,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:13,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:13,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:13,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:13,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:13,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:13,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:13,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:13,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:13,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:13,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:13,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:13,703 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-14 05:25:13,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025862220] [2020-10-14 05:25:13,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:13,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:25:13,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937392377] [2020-10-14 05:25:13,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:25:13,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:13,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:25:13,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:13,708 INFO L87 Difference]: Start difference. First operand 165 states and 227 transitions. Second operand 7 states. [2020-10-14 05:25:13,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:13,814 INFO L93 Difference]: Finished difference Result 287 states and 365 transitions. [2020-10-14 05:25:13,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:25:13,815 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-14 05:25:13,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:13,817 INFO L225 Difference]: With dead ends: 287 [2020-10-14 05:25:13,817 INFO L226 Difference]: Without dead ends: 281 [2020-10-14 05:25:13,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:13,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-14 05:25:13,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 215. [2020-10-14 05:25:13,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-14 05:25:13,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 288 transitions. [2020-10-14 05:25:13,836 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 288 transitions. Word has length 24 [2020-10-14 05:25:13,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:13,839 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 288 transitions. [2020-10-14 05:25:13,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:25:13,839 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 288 transitions. [2020-10-14 05:25:13,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:25:13,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:13,840 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:13,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 05:25:13,841 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:13,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:13,842 INFO L82 PathProgramCache]: Analyzing trace with hash -2080558835, now seen corresponding path program 9 times [2020-10-14 05:25:13,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:13,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916805464] [2020-10-14 05:25:13,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:13,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:13,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:13,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:13,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:14,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:14,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:25:14,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:14,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 613 [2020-10-14 05:25:14,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:14,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:14,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:25:14,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:14,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:25:14,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:14,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:14,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:14,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:14,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:14,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:14,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:14,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:14,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:14,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:14,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:14,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:14,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:14,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 05:25:14,651 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:14,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916805464] [2020-10-14 05:25:14,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:14,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:25:14,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129675113] [2020-10-14 05:25:14,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:25:14,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:14,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:25:14,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:25:14,653 INFO L87 Difference]: Start difference. First operand 215 states and 288 transitions. Second operand 13 states. [2020-10-14 05:25:15,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:15,148 INFO L93 Difference]: Finished difference Result 445 states and 627 transitions. [2020-10-14 05:25:15,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:25:15,149 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-10-14 05:25:15,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:15,151 INFO L225 Difference]: With dead ends: 445 [2020-10-14 05:25:15,151 INFO L226 Difference]: Without dead ends: 394 [2020-10-14 05:25:15,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:25:15,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-10-14 05:25:15,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 226. [2020-10-14 05:25:15,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-14 05:25:15,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 304 transitions. [2020-10-14 05:25:15,173 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 304 transitions. Word has length 24 [2020-10-14 05:25:15,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:15,173 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 304 transitions. [2020-10-14 05:25:15,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:25:15,173 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 304 transitions. [2020-10-14 05:25:15,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 05:25:15,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:15,174 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:15,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 05:25:15,175 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:15,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:15,175 INFO L82 PathProgramCache]: Analyzing trace with hash 476914974, now seen corresponding path program 8 times [2020-10-14 05:25:15,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:15,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717449774] [2020-10-14 05:25:15,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:15,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:15,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:15,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:15,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:15,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 05:25:15,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:15,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 384 [2020-10-14 05:25:15,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:15,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:15,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:25:15,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:15,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 05:25:15,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:18,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:18,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:18,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:18,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:18,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:18,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:18,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:25:18,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:18,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:18,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:18,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:18,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:18,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:18,331 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:25:18,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717449774] [2020-10-14 05:25:18,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:18,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:25:18,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982065105] [2020-10-14 05:25:18,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:25:18,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:18,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:25:18,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=107, Unknown=1, NotChecked=0, Total=132 [2020-10-14 05:25:18,333 INFO L87 Difference]: Start difference. First operand 226 states and 304 transitions. Second operand 12 states. [2020-10-14 05:25:23,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:23,278 INFO L93 Difference]: Finished difference Result 247 states and 325 transitions. [2020-10-14 05:25:23,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:25:23,279 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-10-14 05:25:23,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:23,281 INFO L225 Difference]: With dead ends: 247 [2020-10-14 05:25:23,281 INFO L226 Difference]: Without dead ends: 233 [2020-10-14 05:25:23,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=38, Invalid=171, Unknown=1, NotChecked=0, Total=210 [2020-10-14 05:25:23,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-14 05:25:23,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 223. [2020-10-14 05:25:23,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-14 05:25:23,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 300 transitions. [2020-10-14 05:25:23,299 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 300 transitions. Word has length 25 [2020-10-14 05:25:23,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:23,300 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 300 transitions. [2020-10-14 05:25:23,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:25:23,300 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 300 transitions. [2020-10-14 05:25:23,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 05:25:23,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:23,301 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:23,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 05:25:23,301 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:23,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:23,302 INFO L82 PathProgramCache]: Analyzing trace with hash -2054157634, now seen corresponding path program 9 times [2020-10-14 05:25:23,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:23,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033026423] [2020-10-14 05:25:23,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:23,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:23,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:23,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:23,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:23,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:26,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:26,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 05:25:26,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:25:26,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3003 [2020-10-14 05:25:26,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:26,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:26,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:25:26,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:25:26,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:25:26,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:26,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:26,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:26,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:26,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:26,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:26,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:26,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:26,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:26,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:26,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:26,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:26,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 05:25:26,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033026423] [2020-10-14 05:25:26,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:26,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:25:26,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286113295] [2020-10-14 05:25:26,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:25:26,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:26,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:25:26,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:26,410 INFO L87 Difference]: Start difference. First operand 223 states and 300 transitions. Second operand 7 states. [2020-10-14 05:25:26,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:26,716 INFO L93 Difference]: Finished difference Result 277 states and 382 transitions. [2020-10-14 05:25:26,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:25:26,717 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-14 05:25:26,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:26,719 INFO L225 Difference]: With dead ends: 277 [2020-10-14 05:25:26,719 INFO L226 Difference]: Without dead ends: 266 [2020-10-14 05:25:26,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:25:26,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-14 05:25:26,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 235. [2020-10-14 05:25:26,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-14 05:25:26,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 312 transitions. [2020-10-14 05:25:26,742 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 312 transitions. Word has length 25 [2020-10-14 05:25:26,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:26,742 INFO L479 AbstractCegarLoop]: Abstraction has 235 states and 312 transitions. [2020-10-14 05:25:26,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:25:26,742 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 312 transitions. [2020-10-14 05:25:26,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 05:25:26,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:26,743 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:26,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 05:25:26,743 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:26,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:26,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1604972830, now seen corresponding path program 3 times [2020-10-14 05:25:26,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:26,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592895254] [2020-10-14 05:25:26,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:26,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:26,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:26,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:26,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:29,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:29,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 05:25:29,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:25:29,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2489 [2020-10-14 05:25:29,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:29,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:29,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:25:29,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:25:29,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:25:29,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:29,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:29,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:29,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:29,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:29,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:29,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:29,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:29,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:29,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:29,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:29,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:29,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:29,356 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 05:25:29,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592895254] [2020-10-14 05:25:29,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:29,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:25:29,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791639261] [2020-10-14 05:25:29,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:25:29,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:29,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:25:29,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:29,359 INFO L87 Difference]: Start difference. First operand 235 states and 312 transitions. Second operand 7 states. [2020-10-14 05:25:29,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:29,539 INFO L93 Difference]: Finished difference Result 317 states and 432 transitions. [2020-10-14 05:25:29,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:25:29,540 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-14 05:25:29,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:29,542 INFO L225 Difference]: With dead ends: 317 [2020-10-14 05:25:29,542 INFO L226 Difference]: Without dead ends: 300 [2020-10-14 05:25:29,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:29,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-10-14 05:25:29,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 266. [2020-10-14 05:25:29,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-14 05:25:29,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 358 transitions. [2020-10-14 05:25:29,565 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 358 transitions. Word has length 25 [2020-10-14 05:25:29,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:29,565 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 358 transitions. [2020-10-14 05:25:29,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:25:29,566 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 358 transitions. [2020-10-14 05:25:29,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 05:25:29,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:29,567 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:29,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 05:25:29,567 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:29,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:29,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1925681058, now seen corresponding path program 10 times [2020-10-14 05:25:29,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:29,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089056479] [2020-10-14 05:25:29,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:29,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:29,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:29,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:30,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:30,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 05:25:30,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:30,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 810 [2020-10-14 05:25:30,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:30,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:30,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:25:30,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:30,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:25:30,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:30,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:30,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:30,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:30,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:30,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:30,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:30,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:30,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:30,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:30,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:30,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:30,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:30,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:30,582 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:30,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089056479] [2020-10-14 05:25:30,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:30,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:25:30,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233275903] [2020-10-14 05:25:30,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:25:30,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:30,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:25:30,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:25:30,583 INFO L87 Difference]: Start difference. First operand 266 states and 358 transitions. Second operand 14 states. [2020-10-14 05:25:31,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:31,226 INFO L93 Difference]: Finished difference Result 543 states and 766 transitions. [2020-10-14 05:25:31,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:25:31,227 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2020-10-14 05:25:31,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:31,230 INFO L225 Difference]: With dead ends: 543 [2020-10-14 05:25:31,230 INFO L226 Difference]: Without dead ends: 485 [2020-10-14 05:25:31,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:25:31,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2020-10-14 05:25:31,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 279. [2020-10-14 05:25:31,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-10-14 05:25:31,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 377 transitions. [2020-10-14 05:25:31,256 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 377 transitions. Word has length 25 [2020-10-14 05:25:31,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:31,256 INFO L479 AbstractCegarLoop]: Abstraction has 279 states and 377 transitions. [2020-10-14 05:25:31,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:25:31,256 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 377 transitions. [2020-10-14 05:25:31,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:25:31,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:31,257 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:31,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 05:25:31,258 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:31,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:31,259 INFO L82 PathProgramCache]: Analyzing trace with hash 2043415758, now seen corresponding path program 10 times [2020-10-14 05:25:31,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:31,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179072265] [2020-10-14 05:25:31,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:31,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:31,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:31,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:32,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:33,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:33,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:25:33,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:25:33,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1760 [2020-10-14 05:25:33,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:33,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:33,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:25:33,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:25:33,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:25:33,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:33,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:33,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:33,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:33,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:33,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:33,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:33,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:33,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:33,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:33,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:33,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:33,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:33,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:33,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 05:25:33,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179072265] [2020-10-14 05:25:33,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:33,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:25:33,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712860701] [2020-10-14 05:25:33,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:25:33,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:33,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:25:33,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:33,171 INFO L87 Difference]: Start difference. First operand 279 states and 377 transitions. Second operand 8 states. [2020-10-14 05:25:33,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:33,384 INFO L93 Difference]: Finished difference Result 383 states and 539 transitions. [2020-10-14 05:25:33,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:25:33,385 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-14 05:25:33,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:33,387 INFO L225 Difference]: With dead ends: 383 [2020-10-14 05:25:33,387 INFO L226 Difference]: Without dead ends: 366 [2020-10-14 05:25:33,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:33,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-10-14 05:25:33,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 324. [2020-10-14 05:25:33,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-10-14 05:25:33,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 438 transitions. [2020-10-14 05:25:33,411 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 438 transitions. Word has length 26 [2020-10-14 05:25:33,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:33,411 INFO L479 AbstractCegarLoop]: Abstraction has 324 states and 438 transitions. [2020-10-14 05:25:33,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:25:33,412 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 438 transitions. [2020-10-14 05:25:33,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:25:33,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:33,413 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:33,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 05:25:33,413 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:33,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:33,413 INFO L82 PathProgramCache]: Analyzing trace with hash 487367119, now seen corresponding path program 11 times [2020-10-14 05:25:33,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:33,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987660576] [2020-10-14 05:25:33,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:33,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:33,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:33,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:33,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:33,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:33,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:34,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:34,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:25:34,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:25:34,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1080 [2020-10-14 05:25:34,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:34,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:34,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:25:34,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:34,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:25:34,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:34,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:34,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:34,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:34,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:34,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:34,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:34,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:34,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:34,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:34,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:34,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:34,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:34,599 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-14 05:25:34,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987660576] [2020-10-14 05:25:34,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:34,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:25:34,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788083937] [2020-10-14 05:25:34,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:25:34,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:34,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:25:34,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:34,601 INFO L87 Difference]: Start difference. First operand 324 states and 438 transitions. Second operand 8 states. [2020-10-14 05:25:34,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:34,784 INFO L93 Difference]: Finished difference Result 384 states and 505 transitions. [2020-10-14 05:25:34,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:25:34,785 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-14 05:25:34,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:34,787 INFO L225 Difference]: With dead ends: 384 [2020-10-14 05:25:34,787 INFO L226 Difference]: Without dead ends: 369 [2020-10-14 05:25:34,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:25:34,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-14 05:25:34,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 320. [2020-10-14 05:25:34,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-10-14 05:25:34,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 433 transitions. [2020-10-14 05:25:34,808 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 433 transitions. Word has length 26 [2020-10-14 05:25:34,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:34,808 INFO L479 AbstractCegarLoop]: Abstraction has 320 states and 433 transitions. [2020-10-14 05:25:34,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:25:34,809 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 433 transitions. [2020-10-14 05:25:34,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:25:34,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:34,810 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:34,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 05:25:34,810 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:34,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:34,810 INFO L82 PathProgramCache]: Analyzing trace with hash 886755551, now seen corresponding path program 12 times [2020-10-14 05:25:34,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:34,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045298346] [2020-10-14 05:25:34,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:34,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:34,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:34,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:34,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:34,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:35,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:35,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:35,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:25:35,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:25:35,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 628 [2020-10-14 05:25:35,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:35,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:35,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:25:35,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 05:25:35,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:25:35,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:35,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:35,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:35,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:35,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:35,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:35,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:35,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:35,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:35,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:35,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:35,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:35,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:35,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 05:25:35,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045298346] [2020-10-14 05:25:35,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:35,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:25:35,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425718403] [2020-10-14 05:25:35,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:25:35,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:35,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:25:35,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:35,553 INFO L87 Difference]: Start difference. First operand 320 states and 433 transitions. Second operand 8 states. [2020-10-14 05:25:35,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:35,724 INFO L93 Difference]: Finished difference Result 525 states and 651 transitions. [2020-10-14 05:25:35,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:25:35,727 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-14 05:25:35,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:35,729 INFO L225 Difference]: With dead ends: 525 [2020-10-14 05:25:35,729 INFO L226 Difference]: Without dead ends: 519 [2020-10-14 05:25:35,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:35,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2020-10-14 05:25:35,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 371. [2020-10-14 05:25:35,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2020-10-14 05:25:35,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 492 transitions. [2020-10-14 05:25:35,752 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 492 transitions. Word has length 26 [2020-10-14 05:25:35,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:35,752 INFO L479 AbstractCegarLoop]: Abstraction has 371 states and 492 transitions. [2020-10-14 05:25:35,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:25:35,753 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 492 transitions. [2020-10-14 05:25:35,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:25:35,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:35,754 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:35,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 05:25:35,754 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:35,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:35,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1419437267, now seen corresponding path program 11 times [2020-10-14 05:25:35,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:35,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540602781] [2020-10-14 05:25:35,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:35,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:35,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:35,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:35,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:36,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:36,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:25:36,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:36,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 605 [2020-10-14 05:25:36,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:36,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:36,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:25:36,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:36,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:25:36,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:36,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:36,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:36,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:36,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:36,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:36,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:36,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:36,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:36,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:36,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:36,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:36,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:36,603 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:36,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540602781] [2020-10-14 05:25:36,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:36,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:25:36,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677889375] [2020-10-14 05:25:36,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:25:36,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:36,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:25:36,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:25:36,605 INFO L87 Difference]: Start difference. First operand 371 states and 492 transitions. Second operand 15 states. [2020-10-14 05:25:37,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:37,328 INFO L93 Difference]: Finished difference Result 750 states and 1040 transitions. [2020-10-14 05:25:37,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:25:37,331 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-10-14 05:25:37,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:37,335 INFO L225 Difference]: With dead ends: 750 [2020-10-14 05:25:37,336 INFO L226 Difference]: Without dead ends: 676 [2020-10-14 05:25:37,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:25:37,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2020-10-14 05:25:37,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 386. [2020-10-14 05:25:37,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-10-14 05:25:37,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 514 transitions. [2020-10-14 05:25:37,369 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 514 transitions. Word has length 26 [2020-10-14 05:25:37,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:37,369 INFO L479 AbstractCegarLoop]: Abstraction has 386 states and 514 transitions. [2020-10-14 05:25:37,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:25:37,369 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 514 transitions. [2020-10-14 05:25:37,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 05:25:37,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:37,370 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:37,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 05:25:37,371 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:37,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:37,371 INFO L82 PathProgramCache]: Analyzing trace with hash -390883138, now seen corresponding path program 13 times [2020-10-14 05:25:37,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:37,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372928800] [2020-10-14 05:25:37,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:37,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:37,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:37,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:37,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:37,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:38,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:38,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 05:25:38,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:25:38,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 678 [2020-10-14 05:25:38,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:38,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:38,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:25:38,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 05:25:38,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:25:38,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:38,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:38,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:38,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:38,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:38,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:38,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:38,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:38,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:38,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:38,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:38,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:38,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:38,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:38,141 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 05:25:38,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372928800] [2020-10-14 05:25:38,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:38,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:25:38,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125010306] [2020-10-14 05:25:38,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:25:38,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:38,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:25:38,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:25:38,142 INFO L87 Difference]: Start difference. First operand 386 states and 514 transitions. Second operand 8 states. [2020-10-14 05:25:38,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:38,583 INFO L93 Difference]: Finished difference Result 539 states and 676 transitions. [2020-10-14 05:25:38,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:25:38,586 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-14 05:25:38,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:38,589 INFO L225 Difference]: With dead ends: 539 [2020-10-14 05:25:38,589 INFO L226 Difference]: Without dead ends: 490 [2020-10-14 05:25:38,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:25:38,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-10-14 05:25:38,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 351. [2020-10-14 05:25:38,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-14 05:25:38,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 456 transitions. [2020-10-14 05:25:38,618 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 456 transitions. Word has length 27 [2020-10-14 05:25:38,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:38,619 INFO L479 AbstractCegarLoop]: Abstraction has 351 states and 456 transitions. [2020-10-14 05:25:38,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:25:38,619 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 456 transitions. [2020-10-14 05:25:38,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 05:25:38,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:38,620 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:38,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 05:25:38,621 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:38,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:38,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1389218366, now seen corresponding path program 12 times [2020-10-14 05:25:38,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:38,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189639751] [2020-10-14 05:25:38,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:38,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:38,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:38,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:39,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:39,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 05:25:39,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:39,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 645 [2020-10-14 05:25:39,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:39,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:39,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:25:39,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:39,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:25:39,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:39,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:39,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:39,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:39,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:39,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:39,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:39,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:39,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:39,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:39,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:39,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:39,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:39,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:39,526 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:39,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189639751] [2020-10-14 05:25:39,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:39,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:25:39,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432177851] [2020-10-14 05:25:39,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:25:39,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:39,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:25:39,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:25:39,528 INFO L87 Difference]: Start difference. First operand 351 states and 456 transitions. Second operand 16 states. [2020-10-14 05:25:40,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:40,301 INFO L93 Difference]: Finished difference Result 711 states and 966 transitions. [2020-10-14 05:25:40,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:25:40,302 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-10-14 05:25:40,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:40,305 INFO L225 Difference]: With dead ends: 711 [2020-10-14 05:25:40,305 INFO L226 Difference]: Without dead ends: 652 [2020-10-14 05:25:40,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:25:40,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2020-10-14 05:25:40,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 366. [2020-10-14 05:25:40,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2020-10-14 05:25:40,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 478 transitions. [2020-10-14 05:25:40,334 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 478 transitions. Word has length 27 [2020-10-14 05:25:40,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:40,334 INFO L479 AbstractCegarLoop]: Abstraction has 366 states and 478 transitions. [2020-10-14 05:25:40,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:25:40,335 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 478 transitions. [2020-10-14 05:25:40,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:25:40,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:40,336 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:40,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 05:25:40,336 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:40,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:40,337 INFO L82 PathProgramCache]: Analyzing trace with hash 424140461, now seen corresponding path program 14 times [2020-10-14 05:25:40,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:40,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505725554] [2020-10-14 05:25:40,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:40,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:40,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:40,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:40,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:40,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:40,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:41,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:41,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:25:41,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:25:41,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1363 [2020-10-14 05:25:41,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:41,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:41,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:25:41,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:41,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:25:41,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:41,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:41,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:41,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:41,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:41,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:41,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:41,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:41,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:41,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:41,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:41,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:41,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:41,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:41,805 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-14 05:25:41,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505725554] [2020-10-14 05:25:41,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:41,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:25:41,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560802339] [2020-10-14 05:25:41,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:25:41,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:41,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:25:41,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:25:41,807 INFO L87 Difference]: Start difference. First operand 366 states and 478 transitions. Second operand 9 states. [2020-10-14 05:25:42,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:42,027 INFO L93 Difference]: Finished difference Result 411 states and 526 transitions. [2020-10-14 05:25:42,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:25:42,028 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-14 05:25:42,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:42,030 INFO L225 Difference]: With dead ends: 411 [2020-10-14 05:25:42,030 INFO L226 Difference]: Without dead ends: 395 [2020-10-14 05:25:42,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:25:42,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-10-14 05:25:42,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 362. [2020-10-14 05:25:42,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-10-14 05:25:42,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 473 transitions. [2020-10-14 05:25:42,055 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 473 transitions. Word has length 28 [2020-10-14 05:25:42,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:42,056 INFO L479 AbstractCegarLoop]: Abstraction has 362 states and 473 transitions. [2020-10-14 05:25:42,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:25:42,056 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 473 transitions. [2020-10-14 05:25:42,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:25:42,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:42,057 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:42,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 05:25:42,057 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:42,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:42,058 INFO L82 PathProgramCache]: Analyzing trace with hash 796219439, now seen corresponding path program 15 times [2020-10-14 05:25:42,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:42,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077687785] [2020-10-14 05:25:42,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:42,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:42,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:42,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:42,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:42,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:42,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:42,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:25:42,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:25:42,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 817 [2020-10-14 05:25:42,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:42,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:42,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:25:42,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 05:25:42,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 05:25:42,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:42,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:42,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:42,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:42,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:42,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:42,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:42,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:42,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:42,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:42,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:42,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:42,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:42,937 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-14 05:25:42,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077687785] [2020-10-14 05:25:42,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:42,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:25:42,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746510426] [2020-10-14 05:25:42,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:25:42,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:42,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:25:42,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:25:42,939 INFO L87 Difference]: Start difference. First operand 362 states and 473 transitions. Second operand 6 states. [2020-10-14 05:25:43,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:43,053 INFO L93 Difference]: Finished difference Result 436 states and 557 transitions. [2020-10-14 05:25:43,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:25:43,054 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-14 05:25:43,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:43,056 INFO L225 Difference]: With dead ends: 436 [2020-10-14 05:25:43,056 INFO L226 Difference]: Without dead ends: 369 [2020-10-14 05:25:43,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:25:43,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-14 05:25:43,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 327. [2020-10-14 05:25:43,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-10-14 05:25:43,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 419 transitions. [2020-10-14 05:25:43,081 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 419 transitions. Word has length 28 [2020-10-14 05:25:43,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:43,081 INFO L479 AbstractCegarLoop]: Abstraction has 327 states and 419 transitions. [2020-10-14 05:25:43,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:25:43,081 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 419 transitions. [2020-10-14 05:25:43,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:25:43,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:43,082 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:43,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 05:25:43,083 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:43,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:43,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1736770227, now seen corresponding path program 13 times [2020-10-14 05:25:43,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:43,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852708655] [2020-10-14 05:25:43,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:43,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:43,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:43,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:43,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:43,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:43,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:25:43,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:43,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 895 [2020-10-14 05:25:43,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:43,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:43,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:25:43,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:43,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 05:25:43,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:44,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:44,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:44,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:44,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:44,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:44,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:44,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:44,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:44,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:44,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:44,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:44,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:44,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:44,283 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:44,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852708655] [2020-10-14 05:25:44,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:44,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:25:44,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270781103] [2020-10-14 05:25:44,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:25:44,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:44,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:25:44,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:25:44,285 INFO L87 Difference]: Start difference. First operand 327 states and 419 transitions. Second operand 17 states. [2020-10-14 05:25:45,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:45,188 INFO L93 Difference]: Finished difference Result 677 states and 912 transitions. [2020-10-14 05:25:45,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 05:25:45,189 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-10-14 05:25:45,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:45,194 INFO L225 Difference]: With dead ends: 677 [2020-10-14 05:25:45,194 INFO L226 Difference]: Without dead ends: 623 [2020-10-14 05:25:45,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:25:45,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-10-14 05:25:45,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 341. [2020-10-14 05:25:45,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-10-14 05:25:45,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 439 transitions. [2020-10-14 05:25:45,226 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 439 transitions. Word has length 28 [2020-10-14 05:25:45,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:45,226 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 439 transitions. [2020-10-14 05:25:45,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:25:45,226 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 439 transitions. [2020-10-14 05:25:45,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 05:25:45,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:45,227 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:45,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 05:25:45,230 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:45,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:45,230 INFO L82 PathProgramCache]: Analyzing trace with hash 141831198, now seen corresponding path program 14 times [2020-10-14 05:25:45,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:45,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614694557] [2020-10-14 05:25:45,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:45,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:45,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:45,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:45,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:46,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:46,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 05:25:46,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:46,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 863 [2020-10-14 05:25:46,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:46,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:46,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:25:46,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:46,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 05:25:46,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:46,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:46,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:46,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:46,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:46,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:46,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:46,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:46,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:46,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:46,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:46,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:46,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:46,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:46,410 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:46,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614694557] [2020-10-14 05:25:46,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:46,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:25:46,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385622311] [2020-10-14 05:25:46,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:25:46,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:46,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:25:46,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:25:46,412 INFO L87 Difference]: Start difference. First operand 341 states and 439 transitions. Second operand 18 states. [2020-10-14 05:25:47,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:47,372 INFO L93 Difference]: Finished difference Result 708 states and 959 transitions. [2020-10-14 05:25:47,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:25:47,373 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2020-10-14 05:25:47,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:47,375 INFO L225 Difference]: With dead ends: 708 [2020-10-14 05:25:47,375 INFO L226 Difference]: Without dead ends: 654 [2020-10-14 05:25:47,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:25:47,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2020-10-14 05:25:47,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 355. [2020-10-14 05:25:47,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-14 05:25:47,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 459 transitions. [2020-10-14 05:25:47,404 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 459 transitions. Word has length 29 [2020-10-14 05:25:47,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:47,405 INFO L479 AbstractCegarLoop]: Abstraction has 355 states and 459 transitions. [2020-10-14 05:25:47,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:25:47,405 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 459 transitions. [2020-10-14 05:25:47,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:25:47,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:47,406 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:47,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 05:25:47,406 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:47,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:47,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1699936783, now seen corresponding path program 16 times [2020-10-14 05:25:47,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:47,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803121916] [2020-10-14 05:25:47,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:47,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:47,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:47,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:47,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:25:47,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:47,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 475 [2020-10-14 05:25:47,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:47,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:47,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:25:47,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:47,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 05:25:47,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:48,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:48,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:48,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:48,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:48,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:48,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:48,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:48,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:48,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:48,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:48,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:48,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:48,161 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-14 05:25:48,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803121916] [2020-10-14 05:25:48,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:48,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:25:48,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590432628] [2020-10-14 05:25:48,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:25:48,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:48,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:25:48,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:25:48,162 INFO L87 Difference]: Start difference. First operand 355 states and 459 transitions. Second operand 13 states. [2020-10-14 05:25:48,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:48,635 INFO L93 Difference]: Finished difference Result 380 states and 484 transitions. [2020-10-14 05:25:48,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 05:25:48,635 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-14 05:25:48,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:48,638 INFO L225 Difference]: With dead ends: 380 [2020-10-14 05:25:48,638 INFO L226 Difference]: Without dead ends: 331 [2020-10-14 05:25:48,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:25:48,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-14 05:25:48,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2020-10-14 05:25:48,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-10-14 05:25:48,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 430 transitions. [2020-10-14 05:25:48,663 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 430 transitions. Word has length 30 [2020-10-14 05:25:48,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:48,663 INFO L479 AbstractCegarLoop]: Abstraction has 331 states and 430 transitions. [2020-10-14 05:25:48,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:25:48,663 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 430 transitions. [2020-10-14 05:25:48,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:25:48,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:48,664 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:48,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 05:25:48,665 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:48,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:48,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1550681293, now seen corresponding path program 17 times [2020-10-14 05:25:48,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:48,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379904598] [2020-10-14 05:25:48,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:48,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:48,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:48,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:48,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:49,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:49,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:50,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:50,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:25:50,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:25:50,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1660 [2020-10-14 05:25:50,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:50,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:50,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:25:50,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 05:25:50,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:25:50,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:50,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:50,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:50,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:50,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:50,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:50,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:50,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:50,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:50,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:50,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:50,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:50,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:50,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:50,476 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-14 05:25:50,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379904598] [2020-10-14 05:25:50,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:50,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:25:50,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976522969] [2020-10-14 05:25:50,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:25:50,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:50,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:25:50,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:25:50,480 INFO L87 Difference]: Start difference. First operand 331 states and 430 transitions. Second operand 9 states. [2020-10-14 05:25:50,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:50,638 INFO L93 Difference]: Finished difference Result 635 states and 746 transitions. [2020-10-14 05:25:50,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:25:50,639 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-14 05:25:50,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:50,642 INFO L225 Difference]: With dead ends: 635 [2020-10-14 05:25:50,642 INFO L226 Difference]: Without dead ends: 629 [2020-10-14 05:25:50,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:25:50,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2020-10-14 05:25:50,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 379. [2020-10-14 05:25:50,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-10-14 05:25:50,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 484 transitions. [2020-10-14 05:25:50,674 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 484 transitions. Word has length 30 [2020-10-14 05:25:50,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:50,675 INFO L479 AbstractCegarLoop]: Abstraction has 379 states and 484 transitions. [2020-10-14 05:25:50,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:25:50,675 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 484 transitions. [2020-10-14 05:25:50,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:25:50,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:50,676 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:50,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 05:25:50,676 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:50,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:50,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1751066771, now seen corresponding path program 15 times [2020-10-14 05:25:50,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:50,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485427775] [2020-10-14 05:25:50,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:50,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:50,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:50,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:51,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:51,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:25:51,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:51,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 809 [2020-10-14 05:25:51,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:51,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:51,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:25:51,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:51,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 05:25:51,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:51,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:51,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:51,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:51,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:51,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:51,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:51,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:51,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:51,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:51,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:51,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:51,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:51,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:51,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485427775] [2020-10-14 05:25:51,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:51,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:25:51,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495967159] [2020-10-14 05:25:51,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:25:51,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:51,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:25:51,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:25:51,802 INFO L87 Difference]: Start difference. First operand 379 states and 484 transitions. Second operand 19 states. [2020-10-14 05:25:52,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:52,786 INFO L93 Difference]: Finished difference Result 790 states and 1059 transitions. [2020-10-14 05:25:52,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:25:52,787 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 30 [2020-10-14 05:25:52,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:52,791 INFO L225 Difference]: With dead ends: 790 [2020-10-14 05:25:52,791 INFO L226 Difference]: Without dead ends: 728 [2020-10-14 05:25:52,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:25:52,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2020-10-14 05:25:52,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 393. [2020-10-14 05:25:52,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-10-14 05:25:52,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 504 transitions. [2020-10-14 05:25:52,827 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 504 transitions. Word has length 30 [2020-10-14 05:25:52,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:52,828 INFO L479 AbstractCegarLoop]: Abstraction has 393 states and 504 transitions. [2020-10-14 05:25:52,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:25:52,828 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 504 transitions. [2020-10-14 05:25:52,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 05:25:52,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:52,829 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:52,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 05:25:52,830 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:52,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:52,830 INFO L82 PathProgramCache]: Analyzing trace with hash -367068354, now seen corresponding path program 18 times [2020-10-14 05:25:52,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:52,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404141287] [2020-10-14 05:25:52,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:52,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:52,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:52,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:52,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:53,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:53,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:55,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:55,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 05:25:55,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:25:55,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3055 [2020-10-14 05:25:55,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:55,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:55,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:25:55,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:55,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:25:55,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:56,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:56,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:56,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:56,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:56,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:56,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:56,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:56,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:56,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:56,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:56,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:56,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-14 05:25:56,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404141287] [2020-10-14 05:25:56,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:56,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:25:56,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578829413] [2020-10-14 05:25:56,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:25:56,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:56,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:25:56,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:25:56,010 INFO L87 Difference]: Start difference. First operand 393 states and 504 transitions. Second operand 10 states. [2020-10-14 05:25:56,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:56,241 INFO L93 Difference]: Finished difference Result 451 states and 566 transitions. [2020-10-14 05:25:56,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:25:56,242 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-14 05:25:56,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:56,244 INFO L225 Difference]: With dead ends: 451 [2020-10-14 05:25:56,244 INFO L226 Difference]: Without dead ends: 433 [2020-10-14 05:25:56,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:25:56,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2020-10-14 05:25:56,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 388. [2020-10-14 05:25:56,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-10-14 05:25:56,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 498 transitions. [2020-10-14 05:25:56,272 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 498 transitions. Word has length 31 [2020-10-14 05:25:56,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:56,273 INFO L479 AbstractCegarLoop]: Abstraction has 388 states and 498 transitions. [2020-10-14 05:25:56,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:25:56,273 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 498 transitions. [2020-10-14 05:25:56,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 05:25:56,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:56,274 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:56,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 05:25:56,274 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:56,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:56,275 INFO L82 PathProgramCache]: Analyzing trace with hash -301361666, now seen corresponding path program 16 times [2020-10-14 05:25:56,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:56,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811677136] [2020-10-14 05:25:56,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:56,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:56,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:56,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:56,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:56,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:56,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 05:25:56,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:56,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 709 [2020-10-14 05:25:56,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:56,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:56,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:25:56,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:56,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 05:25:56,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:57,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:57,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:57,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:57,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:57,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:57,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:57,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:57,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:57,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:57,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:57,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:57,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:57,352 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:25:57,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811677136] [2020-10-14 05:25:57,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:57,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 05:25:57,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759593291] [2020-10-14 05:25:57,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 05:25:57,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:57,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 05:25:57,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:25:57,353 INFO L87 Difference]: Start difference. First operand 388 states and 498 transitions. Second operand 20 states. [2020-10-14 05:25:58,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:58,501 INFO L93 Difference]: Finished difference Result 814 states and 1098 transitions. [2020-10-14 05:25:58,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:25:58,502 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2020-10-14 05:25:58,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:58,504 INFO L225 Difference]: With dead ends: 814 [2020-10-14 05:25:58,505 INFO L226 Difference]: Without dead ends: 752 [2020-10-14 05:25:58,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:25:58,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2020-10-14 05:25:58,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 402. [2020-10-14 05:25:58,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-10-14 05:25:58,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 518 transitions. [2020-10-14 05:25:58,535 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 518 transitions. Word has length 31 [2020-10-14 05:25:58,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:58,535 INFO L479 AbstractCegarLoop]: Abstraction has 402 states and 518 transitions. [2020-10-14 05:25:58,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 05:25:58,536 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 518 transitions. [2020-10-14 05:25:58,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:25:58,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:58,537 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:58,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 05:25:58,537 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:58,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:58,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1942984129, now seen corresponding path program 19 times [2020-10-14 05:25:58,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:58,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868079527] [2020-10-14 05:25:58,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:58,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:58,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:58,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:59,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:59,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:00,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:00,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 05:26:00,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:26:00,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1668 [2020-10-14 05:26:00,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:00,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:00,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:26:00,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 05:26:00,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:26:00,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:00,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:00,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:00,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:00,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:00,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:00,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:00,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:00,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:00,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:00,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:00,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:00,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:00,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:26:00,380 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-14 05:26:00,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868079527] [2020-10-14 05:26:00,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:00,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:26:00,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320547060] [2020-10-14 05:26:00,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:26:00,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:00,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:26:00,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:26:00,383 INFO L87 Difference]: Start difference. First operand 402 states and 518 transitions. Second operand 10 states. [2020-10-14 05:26:00,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:00,695 INFO L93 Difference]: Finished difference Result 787 states and 916 transitions. [2020-10-14 05:26:00,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:26:00,696 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-14 05:26:00,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:00,700 INFO L225 Difference]: With dead ends: 787 [2020-10-14 05:26:00,701 INFO L226 Difference]: Without dead ends: 781 [2020-10-14 05:26:00,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:26:00,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2020-10-14 05:26:00,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 455. [2020-10-14 05:26:00,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2020-10-14 05:26:00,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 577 transitions. [2020-10-14 05:26:00,737 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 577 transitions. Word has length 32 [2020-10-14 05:26:00,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:00,737 INFO L479 AbstractCegarLoop]: Abstraction has 455 states and 577 transitions. [2020-10-14 05:26:00,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:26:00,738 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 577 transitions. [2020-10-14 05:26:00,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:26:00,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:00,747 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:00,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 05:26:00,747 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:00,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:00,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1689823629, now seen corresponding path program 17 times [2020-10-14 05:26:00,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:00,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240698770] [2020-10-14 05:26:00,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:00,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:00,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:01,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:01,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:01,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:01,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 05:26:01,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:26:01,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1139 [2020-10-14 05:26:01,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:01,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:01,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:26:01,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:01,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 05:26:01,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:02,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:02,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:02,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:02,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:02,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:02,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:02,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:02,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:02,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:02,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:02,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:02,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:02,301 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:02,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240698770] [2020-10-14 05:26:02,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:02,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 05:26:02,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142760843] [2020-10-14 05:26:02,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 05:26:02,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:02,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 05:26:02,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:26:02,303 INFO L87 Difference]: Start difference. First operand 455 states and 577 transitions. Second operand 21 states. [2020-10-14 05:26:03,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:03,486 INFO L93 Difference]: Finished difference Result 956 states and 1281 transitions. [2020-10-14 05:26:03,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 05:26:03,486 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 32 [2020-10-14 05:26:03,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:03,491 INFO L225 Difference]: With dead ends: 956 [2020-10-14 05:26:03,491 INFO L226 Difference]: Without dead ends: 886 [2020-10-14 05:26:03,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:26:03,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2020-10-14 05:26:03,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 469. [2020-10-14 05:26:03,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-10-14 05:26:03,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 597 transitions. [2020-10-14 05:26:03,515 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 597 transitions. Word has length 32 [2020-10-14 05:26:03,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:03,515 INFO L479 AbstractCegarLoop]: Abstraction has 469 states and 597 transitions. [2020-10-14 05:26:03,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 05:26:03,515 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 597 transitions. [2020-10-14 05:26:03,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 05:26:03,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:03,517 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:03,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 05:26:03,517 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:03,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:03,518 INFO L82 PathProgramCache]: Analyzing trace with hash -50676066, now seen corresponding path program 20 times [2020-10-14 05:26:03,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:03,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019883796] [2020-10-14 05:26:03,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:03,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:03,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:03,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:03,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:04,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:04,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:07,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:07,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 05:26:07,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:26:07,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4208 [2020-10-14 05:26:07,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:07,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:07,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:26:07,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:07,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:26:07,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:07,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:07,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:07,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:07,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:07,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:07,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:07,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:07,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:07,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:07,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:07,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:07,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:07,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-14 05:26:07,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019883796] [2020-10-14 05:26:07,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:07,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:26:07,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613884448] [2020-10-14 05:26:07,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:26:07,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:07,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:26:07,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:26:07,867 INFO L87 Difference]: Start difference. First operand 469 states and 597 transitions. Second operand 11 states. [2020-10-14 05:26:08,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:08,147 INFO L93 Difference]: Finished difference Result 524 states and 656 transitions. [2020-10-14 05:26:08,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:26:08,148 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-14 05:26:08,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:08,149 INFO L225 Difference]: With dead ends: 524 [2020-10-14 05:26:08,149 INFO L226 Difference]: Without dead ends: 505 [2020-10-14 05:26:08,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:26:08,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2020-10-14 05:26:08,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 464. [2020-10-14 05:26:08,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2020-10-14 05:26:08,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 591 transitions. [2020-10-14 05:26:08,181 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 591 transitions. Word has length 33 [2020-10-14 05:26:08,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:08,181 INFO L479 AbstractCegarLoop]: Abstraction has 464 states and 591 transitions. [2020-10-14 05:26:08,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:26:08,181 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 591 transitions. [2020-10-14 05:26:08,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 05:26:08,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:08,183 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:08,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 05:26:08,183 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:08,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:08,183 INFO L82 PathProgramCache]: Analyzing trace with hash 763325086, now seen corresponding path program 21 times [2020-10-14 05:26:08,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:08,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680901834] [2020-10-14 05:26:08,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:08,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:08,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:08,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:08,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:09,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:12,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:12,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 05:26:12,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:26:12,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4659 [2020-10-14 05:26:12,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:12,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:12,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:26:12,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:26:12,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:26:12,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:12,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:12,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:12,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:12,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:12,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:12,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:12,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:12,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:12,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:12,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:12,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:12,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:12,954 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-14 05:26:12,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680901834] [2020-10-14 05:26:12,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:12,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:26:12,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77585578] [2020-10-14 05:26:12,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:26:12,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:12,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:26:12,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:26:12,956 INFO L87 Difference]: Start difference. First operand 464 states and 591 transitions. Second operand 8 states. [2020-10-14 05:26:13,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:13,659 INFO L93 Difference]: Finished difference Result 565 states and 728 transitions. [2020-10-14 05:26:13,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:26:13,660 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-14 05:26:13,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:13,662 INFO L225 Difference]: With dead ends: 565 [2020-10-14 05:26:13,662 INFO L226 Difference]: Without dead ends: 551 [2020-10-14 05:26:13,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:26:13,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2020-10-14 05:26:13,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 470. [2020-10-14 05:26:13,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 470 states. [2020-10-14 05:26:13,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 597 transitions. [2020-10-14 05:26:13,697 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 597 transitions. Word has length 33 [2020-10-14 05:26:13,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:13,699 INFO L479 AbstractCegarLoop]: Abstraction has 470 states and 597 transitions. [2020-10-14 05:26:13,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:26:13,699 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 597 transitions. [2020-10-14 05:26:13,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 05:26:13,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:13,703 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:13,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-14 05:26:13,704 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:13,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:13,704 INFO L82 PathProgramCache]: Analyzing trace with hash -634316482, now seen corresponding path program 4 times [2020-10-14 05:26:13,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:13,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114369282] [2020-10-14 05:26:13,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:13,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:13,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:13,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:15,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:18,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:18,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 05:26:18,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:26:18,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4879 [2020-10-14 05:26:18,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:18,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:18,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:26:18,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 05:26:18,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:26:18,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:18,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:18,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:18,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:18,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:18,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:18,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:18,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:18,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:18,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:18,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:18,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:18,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:18,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:18,713 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-14 05:26:18,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114369282] [2020-10-14 05:26:18,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:18,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:26:18,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732444552] [2020-10-14 05:26:18,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:26:18,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:18,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:26:18,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:26:18,714 INFO L87 Difference]: Start difference. First operand 470 states and 597 transitions. Second operand 9 states. [2020-10-14 05:26:19,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:19,746 INFO L93 Difference]: Finished difference Result 623 states and 814 transitions. [2020-10-14 05:26:19,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:26:19,746 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-14 05:26:19,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:19,749 INFO L225 Difference]: With dead ends: 623 [2020-10-14 05:26:19,749 INFO L226 Difference]: Without dead ends: 603 [2020-10-14 05:26:19,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:26:19,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2020-10-14 05:26:19,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 538. [2020-10-14 05:26:19,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 538 states. [2020-10-14 05:26:19,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 686 transitions. [2020-10-14 05:26:19,788 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 686 transitions. Word has length 33 [2020-10-14 05:26:19,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:19,788 INFO L479 AbstractCegarLoop]: Abstraction has 538 states and 686 transitions. [2020-10-14 05:26:19,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:26:19,788 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 686 transitions. [2020-10-14 05:26:19,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 05:26:19,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:19,790 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:19,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-14 05:26:19,790 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:19,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:19,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1007941666, now seen corresponding path program 18 times [2020-10-14 05:26:19,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:19,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278971424] [2020-10-14 05:26:19,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:19,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:19,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:20,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:20,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:21,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:21,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 05:26:21,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:26:21,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1282 [2020-10-14 05:26:21,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:21,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:21,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 05:26:21,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:21,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 05:26:21,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:21,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:21,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:21,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:21,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:21,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:21,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:21,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:21,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:21,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:21,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:21,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:21,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:21,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:21,500 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:21,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278971424] [2020-10-14 05:26:21,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:21,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:26:21,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111001392] [2020-10-14 05:26:21,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:26:21,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:21,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:26:21,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:26:21,502 INFO L87 Difference]: Start difference. First operand 538 states and 686 transitions. Second operand 22 states. [2020-10-14 05:26:22,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:22,739 INFO L93 Difference]: Finished difference Result 1112 states and 1492 transitions. [2020-10-14 05:26:22,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:26:22,740 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 33 [2020-10-14 05:26:22,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:22,744 INFO L225 Difference]: With dead ends: 1112 [2020-10-14 05:26:22,744 INFO L226 Difference]: Without dead ends: 1035 [2020-10-14 05:26:22,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:26:22,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2020-10-14 05:26:22,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 554. [2020-10-14 05:26:22,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2020-10-14 05:26:22,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 709 transitions. [2020-10-14 05:26:22,780 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 709 transitions. Word has length 33 [2020-10-14 05:26:22,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:22,780 INFO L479 AbstractCegarLoop]: Abstraction has 554 states and 709 transitions. [2020-10-14 05:26:22,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:26:22,780 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 709 transitions. [2020-10-14 05:26:22,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:26:22,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:22,782 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:22,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-14 05:26:22,782 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:22,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:22,782 INFO L82 PathProgramCache]: Analyzing trace with hash 807336174, now seen corresponding path program 22 times [2020-10-14 05:26:22,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:22,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300046611] [2020-10-14 05:26:22,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:22,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:22,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:22,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:22,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:26,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:27,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:27,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:26:27,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:26:27,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 05:26:27,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:27,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:27,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:26:27,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 05:26:27,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:26:27,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:27,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:27,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:27,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:27,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:27,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:27,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:27,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:27,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:27,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:27,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:27,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:27,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:27,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:27,929 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-14 05:26:27,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300046611] [2020-10-14 05:26:27,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:27,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:26:27,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575778138] [2020-10-14 05:26:27,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:26:27,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:27,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:26:27,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:26:27,930 INFO L87 Difference]: Start difference. First operand 554 states and 709 transitions. Second operand 10 states. [2020-10-14 05:26:28,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:28,208 INFO L93 Difference]: Finished difference Result 723 states and 956 transitions. [2020-10-14 05:26:28,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:26:28,210 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-14 05:26:28,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:28,213 INFO L225 Difference]: With dead ends: 723 [2020-10-14 05:26:28,213 INFO L226 Difference]: Without dead ends: 703 [2020-10-14 05:26:28,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:26:28,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2020-10-14 05:26:28,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 630. [2020-10-14 05:26:28,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 630 states. [2020-10-14 05:26:28,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 807 transitions. [2020-10-14 05:26:28,248 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 807 transitions. Word has length 34 [2020-10-14 05:26:28,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:28,248 INFO L479 AbstractCegarLoop]: Abstraction has 630 states and 807 transitions. [2020-10-14 05:26:28,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:26:28,249 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 807 transitions. [2020-10-14 05:26:28,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:26:28,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:28,250 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:28,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-14 05:26:28,250 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:28,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:28,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1686621581, now seen corresponding path program 23 times [2020-10-14 05:26:28,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:28,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066609243] [2020-10-14 05:26:28,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:28,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:28,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:28,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:28,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:29,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:29,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:31,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:31,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:26:31,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:26:31,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3649 [2020-10-14 05:26:31,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:31,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:31,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:26:31,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 05:26:31,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:26:31,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:31,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:31,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:31,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:31,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:31,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:31,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:31,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:31,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:31,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:31,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:31,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:31,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:31,981 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 05:26:31,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066609243] [2020-10-14 05:26:31,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:31,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:26:31,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136799180] [2020-10-14 05:26:31,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:26:31,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:31,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:26:31,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:26:31,982 INFO L87 Difference]: Start difference. First operand 630 states and 807 transitions. Second operand 8 states. [2020-10-14 05:26:32,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:32,228 INFO L93 Difference]: Finished difference Result 796 states and 994 transitions. [2020-10-14 05:26:32,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:26:32,229 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-14 05:26:32,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:32,231 INFO L225 Difference]: With dead ends: 796 [2020-10-14 05:26:32,231 INFO L226 Difference]: Without dead ends: 688 [2020-10-14 05:26:32,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:26:32,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2020-10-14 05:26:32,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 584. [2020-10-14 05:26:32,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-10-14 05:26:32,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 740 transitions. [2020-10-14 05:26:32,274 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 740 transitions. Word has length 34 [2020-10-14 05:26:32,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:32,274 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 740 transitions. [2020-10-14 05:26:32,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:26:32,274 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 740 transitions. [2020-10-14 05:26:32,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:26:32,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:32,276 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:32,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-14 05:26:32,276 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:32,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:32,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1260680109, now seen corresponding path program 19 times [2020-10-14 05:26:32,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:32,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5750615] [2020-10-14 05:26:32,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:32,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:32,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:32,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:33,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:33,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:26:33,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:26:33,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1294 [2020-10-14 05:26:33,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:33,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:33,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 05:26:33,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:33,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 05:26:33,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:34,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:34,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:34,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:34,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:34,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:34,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:34,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:34,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:34,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:34,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:34,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:34,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:34,043 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:34,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5750615] [2020-10-14 05:26:34,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:34,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 05:26:34,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674011722] [2020-10-14 05:26:34,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 05:26:34,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:34,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 05:26:34,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:26:34,044 INFO L87 Difference]: Start difference. First operand 584 states and 740 transitions. Second operand 23 states. [2020-10-14 05:26:35,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:35,475 INFO L93 Difference]: Finished difference Result 1212 states and 1612 transitions. [2020-10-14 05:26:35,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 05:26:35,475 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 34 [2020-10-14 05:26:35,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:35,480 INFO L225 Difference]: With dead ends: 1212 [2020-10-14 05:26:35,480 INFO L226 Difference]: Without dead ends: 1126 [2020-10-14 05:26:35,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:26:35,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2020-10-14 05:26:35,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 601. [2020-10-14 05:26:35,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 601 states. [2020-10-14 05:26:35,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 764 transitions. [2020-10-14 05:26:35,524 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 764 transitions. Word has length 34 [2020-10-14 05:26:35,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:35,524 INFO L479 AbstractCegarLoop]: Abstraction has 601 states and 764 transitions. [2020-10-14 05:26:35,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 05:26:35,525 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 764 transitions. [2020-10-14 05:26:35,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 05:26:35,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:35,526 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:35,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-14 05:26:35,526 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:35,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:35,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1210303682, now seen corresponding path program 24 times [2020-10-14 05:26:35,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:35,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111041634] [2020-10-14 05:26:35,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:35,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:35,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:35,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:36,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:36,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 05:26:36,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:36,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 823 [2020-10-14 05:26:36,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:36,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:36,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:26:36,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:36,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 05:26:36,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:36,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:36,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:36,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:36,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:36,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:36,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:36,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:36,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:36,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:36,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:36,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:36,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:36,936 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-14 05:26:36,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111041634] [2020-10-14 05:26:36,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:36,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:26:36,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146801147] [2020-10-14 05:26:36,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:26:36,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:36,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:26:36,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:26:36,937 INFO L87 Difference]: Start difference. First operand 601 states and 764 transitions. Second operand 15 states. [2020-10-14 05:26:37,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:37,539 INFO L93 Difference]: Finished difference Result 631 states and 794 transitions. [2020-10-14 05:26:37,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:26:37,540 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-14 05:26:37,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:37,542 INFO L225 Difference]: With dead ends: 631 [2020-10-14 05:26:37,543 INFO L226 Difference]: Without dead ends: 566 [2020-10-14 05:26:37,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:26:37,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2020-10-14 05:26:37,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 566. [2020-10-14 05:26:37,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2020-10-14 05:26:37,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 723 transitions. [2020-10-14 05:26:37,583 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 723 transitions. Word has length 35 [2020-10-14 05:26:37,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:37,583 INFO L479 AbstractCegarLoop]: Abstraction has 566 states and 723 transitions. [2020-10-14 05:26:37,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:26:37,583 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 723 transitions. [2020-10-14 05:26:37,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 05:26:37,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:37,585 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:37,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-14 05:26:37,585 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:37,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:37,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1426488898, now seen corresponding path program 20 times [2020-10-14 05:26:37,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:37,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566310338] [2020-10-14 05:26:37,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:37,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:37,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:38,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:38,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:38,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 05:26:38,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:26:38,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 934 [2020-10-14 05:26:38,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:38,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:38,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 05:26:38,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:38,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 05:26:38,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:39,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:39,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:39,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:39,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:39,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:39,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:39,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:39,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:39,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:39,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:39,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:39,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:39,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:39,026 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:39,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566310338] [2020-10-14 05:26:39,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:39,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:26:39,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254797774] [2020-10-14 05:26:39,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:26:39,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:39,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:26:39,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:26:39,029 INFO L87 Difference]: Start difference. First operand 566 states and 723 transitions. Second operand 24 states. [2020-10-14 05:26:40,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:40,616 INFO L93 Difference]: Finished difference Result 1175 states and 1567 transitions. [2020-10-14 05:26:40,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 05:26:40,617 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 35 [2020-10-14 05:26:40,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:40,621 INFO L225 Difference]: With dead ends: 1175 [2020-10-14 05:26:40,621 INFO L226 Difference]: Without dead ends: 1089 [2020-10-14 05:26:40,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:26:40,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2020-10-14 05:26:40,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 583. [2020-10-14 05:26:40,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 583 states. [2020-10-14 05:26:40,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 747 transitions. [2020-10-14 05:26:40,666 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 747 transitions. Word has length 35 [2020-10-14 05:26:40,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:40,667 INFO L479 AbstractCegarLoop]: Abstraction has 583 states and 747 transitions. [2020-10-14 05:26:40,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:26:40,667 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 747 transitions. [2020-10-14 05:26:40,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:26:40,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:40,669 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:40,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-14 05:26:40,671 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:40,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:40,671 INFO L82 PathProgramCache]: Analyzing trace with hash 983580719, now seen corresponding path program 25 times [2020-10-14 05:26:40,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:40,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444057397] [2020-10-14 05:26:40,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:40,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:40,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:40,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:40,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:41,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:42,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:45,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:45,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 05:26:45,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:26:45,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:26:45,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:45,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:45,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:26:45,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:45,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:26:45,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:45,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:45,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:45,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:45,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:45,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:45,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:45,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:26:45,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:45,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:45,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:45,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:45,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:45,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 05:26:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 05:26:45,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444057397] [2020-10-14 05:26:45,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:45,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:26:45,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127872873] [2020-10-14 05:26:45,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:26:45,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:45,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:26:45,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:26:45,869 INFO L87 Difference]: Start difference. First operand 583 states and 747 transitions. Second operand 12 states. [2020-10-14 05:26:46,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:46,269 INFO L93 Difference]: Finished difference Result 664 states and 833 transitions. [2020-10-14 05:26:46,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:26:46,269 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-14 05:26:46,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:46,272 INFO L225 Difference]: With dead ends: 664 [2020-10-14 05:26:46,272 INFO L226 Difference]: Without dead ends: 643 [2020-10-14 05:26:46,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:26:46,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2020-10-14 05:26:46,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 577. [2020-10-14 05:26:46,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 577 states. [2020-10-14 05:26:46,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 740 transitions. [2020-10-14 05:26:46,311 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 740 transitions. Word has length 36 [2020-10-14 05:26:46,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:46,312 INFO L479 AbstractCegarLoop]: Abstraction has 577 states and 740 transitions. [2020-10-14 05:26:46,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:26:46,312 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 740 transitions. [2020-10-14 05:26:46,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:26:46,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:46,313 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:46,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-14 05:26:46,314 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:46,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:46,314 INFO L82 PathProgramCache]: Analyzing trace with hash -2114701649, now seen corresponding path program 26 times [2020-10-14 05:26:46,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:46,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837374577] [2020-10-14 05:26:46,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:46,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:46,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:46,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:46,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:46,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:49,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:49,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 05:26:49,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:26:49,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3479 [2020-10-14 05:26:49,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:49,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:49,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:26:49,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-14 05:26:49,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:26:49,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:26:49,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:49,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:49,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:49,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:49,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:49,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:49,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:49,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:49,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:49,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:49,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:49,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:49,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-14 05:26:49,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837374577] [2020-10-14 05:26:49,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:49,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:26:49,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160961402] [2020-10-14 05:26:49,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:26:49,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:49,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:26:49,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:26:49,965 INFO L87 Difference]: Start difference. First operand 577 states and 740 transitions. Second operand 11 states. [2020-10-14 05:26:50,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:50,195 INFO L93 Difference]: Finished difference Result 1254 states and 1432 transitions. [2020-10-14 05:26:50,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:26:50,196 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-10-14 05:26:50,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:50,200 INFO L225 Difference]: With dead ends: 1254 [2020-10-14 05:26:50,201 INFO L226 Difference]: Without dead ends: 1248 [2020-10-14 05:26:50,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:26:50,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2020-10-14 05:26:50,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 647. [2020-10-14 05:26:50,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 647 states. [2020-10-14 05:26:50,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 817 transitions. [2020-10-14 05:26:50,239 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 817 transitions. Word has length 36 [2020-10-14 05:26:50,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:50,239 INFO L479 AbstractCegarLoop]: Abstraction has 647 states and 817 transitions. [2020-10-14 05:26:50,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:26:50,240 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 817 transitions. [2020-10-14 05:26:50,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:26:50,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:50,241 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:50,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-14 05:26:50,242 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:50,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:50,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1170617805, now seen corresponding path program 21 times [2020-10-14 05:26:50,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:50,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606090661] [2020-10-14 05:26:50,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:50,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:50,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:50,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:51,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:52,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:52,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 05:26:52,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:26:52,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2493 [2020-10-14 05:26:52,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:52,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:52,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 05:26:52,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:52,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 05:26:52,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:53,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:53,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:53,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:53,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:53,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:53,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:53,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:26:53,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:53,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:53,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:53,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:53,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:53,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:26:53,521 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:53,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606090661] [2020-10-14 05:26:53,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:53,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 05:26:53,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416189375] [2020-10-14 05:26:53,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 05:26:53,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:53,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 05:26:53,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:26:53,526 INFO L87 Difference]: Start difference. First operand 647 states and 817 transitions. Second operand 25 states. [2020-10-14 05:26:55,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:55,471 INFO L93 Difference]: Finished difference Result 1349 states and 1788 transitions. [2020-10-14 05:26:55,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 05:26:55,471 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 36 [2020-10-14 05:26:55,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:55,476 INFO L225 Difference]: With dead ends: 1349 [2020-10-14 05:26:55,476 INFO L226 Difference]: Without dead ends: 1253 [2020-10-14 05:26:55,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:26:55,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2020-10-14 05:26:55,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 664. [2020-10-14 05:26:55,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664 states. [2020-10-14 05:26:55,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 841 transitions. [2020-10-14 05:26:55,512 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 841 transitions. Word has length 36 [2020-10-14 05:26:55,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:55,512 INFO L479 AbstractCegarLoop]: Abstraction has 664 states and 841 transitions. [2020-10-14 05:26:55,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 05:26:55,512 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 841 transitions. [2020-10-14 05:26:55,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 05:26:55,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:55,514 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:55,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-14 05:26:55,514 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:55,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:55,515 INFO L82 PathProgramCache]: Analyzing trace with hash 76546974, now seen corresponding path program 22 times [2020-10-14 05:26:55,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:55,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508923430] [2020-10-14 05:26:55,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:55,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:55,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:55,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:56,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:57,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:57,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 05:26:57,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:26:57,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2045 [2020-10-14 05:26:57,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:57,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:57,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 05:26:57,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:57,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 05:26:57,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:58,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:58,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:58,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:58,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:58,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:58,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:58,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:58,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:58,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:58,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:58,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:58,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:58,146 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:26:58,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508923430] [2020-10-14 05:26:58,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:58,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 05:26:58,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103393363] [2020-10-14 05:26:58,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 05:26:58,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:58,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 05:26:58,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:26:58,147 INFO L87 Difference]: Start difference. First operand 664 states and 841 transitions. Second operand 26 states. [2020-10-14 05:26:59,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:59,945 INFO L93 Difference]: Finished difference Result 1388 states and 1846 transitions. [2020-10-14 05:26:59,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 05:26:59,945 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 37 [2020-10-14 05:26:59,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:59,951 INFO L225 Difference]: With dead ends: 1388 [2020-10-14 05:26:59,951 INFO L226 Difference]: Without dead ends: 1292 [2020-10-14 05:26:59,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:26:59,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2020-10-14 05:26:59,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 681. [2020-10-14 05:26:59,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 681 states. [2020-10-14 05:26:59,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 865 transitions. [2020-10-14 05:26:59,986 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 865 transitions. Word has length 37 [2020-10-14 05:26:59,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:59,986 INFO L479 AbstractCegarLoop]: Abstraction has 681 states and 865 transitions. [2020-10-14 05:26:59,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 05:26:59,986 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 865 transitions. [2020-10-14 05:26:59,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 05:26:59,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:59,988 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:59,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-14 05:26:59,989 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:59,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:59,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1017409101, now seen corresponding path program 27 times [2020-10-14 05:26:59,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:59,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966590582] [2020-10-14 05:26:59,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:59,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:00,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:00,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:00,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:01,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:01,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:05,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:05,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:27:05,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:27:05,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 05:27:05,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:05,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:05,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:27:05,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:27:05,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:27:05,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:05,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:05,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:05,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:05,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:05,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:05,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:05,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:05,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:05,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:05,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:05,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:05,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:05,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:05,178 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-14 05:27:05,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966590582] [2020-10-14 05:27:05,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:05,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:27:05,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319406498] [2020-10-14 05:27:05,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:27:05,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:05,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:27:05,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:27:05,179 INFO L87 Difference]: Start difference. First operand 681 states and 865 transitions. Second operand 13 states. [2020-10-14 05:27:05,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:05,560 INFO L93 Difference]: Finished difference Result 758 states and 947 transitions. [2020-10-14 05:27:05,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:27:05,560 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-14 05:27:05,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:05,563 INFO L225 Difference]: With dead ends: 758 [2020-10-14 05:27:05,563 INFO L226 Difference]: Without dead ends: 736 [2020-10-14 05:27:05,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:27:05,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2020-10-14 05:27:05,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 675. [2020-10-14 05:27:05,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 675 states. [2020-10-14 05:27:05,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 858 transitions. [2020-10-14 05:27:05,594 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 858 transitions. Word has length 38 [2020-10-14 05:27:05,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:05,594 INFO L479 AbstractCegarLoop]: Abstraction has 675 states and 858 transitions. [2020-10-14 05:27:05,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:27:05,594 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 858 transitions. [2020-10-14 05:27:05,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 05:27:05,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:05,596 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:05,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-14 05:27:05,596 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:05,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:05,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1862882991, now seen corresponding path program 28 times [2020-10-14 05:27:05,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:05,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330244963] [2020-10-14 05:27:05,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:05,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:05,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:05,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:05,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:10,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:10,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:27:10,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:27:10,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 05:27:10,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:10,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:10,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:27:10,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:27:10,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:27:10,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:10,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:10,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:10,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:10,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:10,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:10,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:10,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:10,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:10,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:10,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:10,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:10,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:10,795 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-14 05:27:10,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330244963] [2020-10-14 05:27:10,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:10,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:27:10,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722735036] [2020-10-14 05:27:10,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:27:10,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:10,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:27:10,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:27:10,797 INFO L87 Difference]: Start difference. First operand 675 states and 858 transitions. Second operand 11 states. [2020-10-14 05:27:11,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:11,147 INFO L93 Difference]: Finished difference Result 881 states and 1162 transitions. [2020-10-14 05:27:11,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:27:11,148 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-10-14 05:27:11,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:11,151 INFO L225 Difference]: With dead ends: 881 [2020-10-14 05:27:11,151 INFO L226 Difference]: Without dead ends: 859 [2020-10-14 05:27:11,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:27:11,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2020-10-14 05:27:11,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 764. [2020-10-14 05:27:11,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 764 states. [2020-10-14 05:27:11,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 973 transitions. [2020-10-14 05:27:11,187 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 973 transitions. Word has length 38 [2020-10-14 05:27:11,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:11,188 INFO L479 AbstractCegarLoop]: Abstraction has 764 states and 973 transitions. [2020-10-14 05:27:11,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:27:11,188 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 973 transitions. [2020-10-14 05:27:11,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 05:27:11,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:11,190 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:11,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-14 05:27:11,190 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:11,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:11,190 INFO L82 PathProgramCache]: Analyzing trace with hash 2029542751, now seen corresponding path program 29 times [2020-10-14 05:27:11,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:11,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811342455] [2020-10-14 05:27:11,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:11,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:11,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:11,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:11,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:13,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:16,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:16,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:27:16,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:27:16,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 05:27:16,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:16,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:16,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:27:16,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:27:16,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:27:16,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:16,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:16,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:16,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:16,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:16,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:16,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:16,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:16,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:16,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:16,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:16,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:16,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-14 05:27:16,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811342455] [2020-10-14 05:27:16,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:16,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:27:16,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385634516] [2020-10-14 05:27:16,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:27:16,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:16,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:27:16,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:27:16,420 INFO L87 Difference]: Start difference. First operand 764 states and 973 transitions. Second operand 12 states. [2020-10-14 05:27:16,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:16,718 INFO L93 Difference]: Finished difference Result 1706 states and 1932 transitions. [2020-10-14 05:27:16,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:27:16,718 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-14 05:27:16,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:16,723 INFO L225 Difference]: With dead ends: 1706 [2020-10-14 05:27:16,723 INFO L226 Difference]: Without dead ends: 1700 [2020-10-14 05:27:16,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:27:16,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2020-10-14 05:27:16,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 852. [2020-10-14 05:27:16,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 852 states. [2020-10-14 05:27:16,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1069 transitions. [2020-10-14 05:27:16,767 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1069 transitions. Word has length 38 [2020-10-14 05:27:16,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:16,767 INFO L479 AbstractCegarLoop]: Abstraction has 852 states and 1069 transitions. [2020-10-14 05:27:16,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:27:16,768 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1069 transitions. [2020-10-14 05:27:16,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 05:27:16,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:16,769 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:16,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-14 05:27:16,770 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:16,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:16,770 INFO L82 PathProgramCache]: Analyzing trace with hash 520089581, now seen corresponding path program 23 times [2020-10-14 05:27:16,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:16,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869796803] [2020-10-14 05:27:16,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:16,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:17,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:17,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:19,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:19,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:27:19,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:27:19,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2423 [2020-10-14 05:27:19,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:19,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:19,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:27:19,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:27:19,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 05:27:19,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:19,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:19,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:19,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:19,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:19,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:19,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:19,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:27:19,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:19,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:19,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:19,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:19,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:19,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:27:19,832 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:27:19,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869796803] [2020-10-14 05:27:19,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:19,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 05:27:19,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838823414] [2020-10-14 05:27:19,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 05:27:19,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:19,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 05:27:19,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:27:19,833 INFO L87 Difference]: Start difference. First operand 852 states and 1069 transitions. Second operand 27 states. [2020-10-14 05:27:21,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:21,747 INFO L93 Difference]: Finished difference Result 1756 states and 2314 transitions. [2020-10-14 05:27:21,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 05:27:21,748 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 38 [2020-10-14 05:27:21,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:21,751 INFO L225 Difference]: With dead ends: 1756 [2020-10-14 05:27:21,751 INFO L226 Difference]: Without dead ends: 1641 [2020-10-14 05:27:21,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:27:21,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2020-10-14 05:27:21,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 871. [2020-10-14 05:27:21,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 871 states. [2020-10-14 05:27:21,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1096 transitions. [2020-10-14 05:27:21,792 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1096 transitions. Word has length 38 [2020-10-14 05:27:21,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:21,792 INFO L479 AbstractCegarLoop]: Abstraction has 871 states and 1096 transitions. [2020-10-14 05:27:21,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 05:27:21,793 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1096 transitions. [2020-10-14 05:27:21,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 05:27:21,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:21,794 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:21,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-14 05:27:21,794 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:21,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:21,794 INFO L82 PathProgramCache]: Analyzing trace with hash -122229183, now seen corresponding path program 30 times [2020-10-14 05:27:21,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:21,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565047750] [2020-10-14 05:27:21,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:21,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:21,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:21,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:21,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:26,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:26,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 05:27:26,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:27:26,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 05:27:26,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:26,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:26,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:27:26,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:27:26,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:27:26,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:27,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:27,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:27,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:27,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:27,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:27,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:27,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:27,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:27,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:27,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:27,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:27,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:27,158 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-14 05:27:27,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565047750] [2020-10-14 05:27:27,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:27,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:27:27,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154300859] [2020-10-14 05:27:27,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:27:27,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:27,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:27:27,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:27:27,160 INFO L87 Difference]: Start difference. First operand 871 states and 1096 transitions. Second operand 12 states. [2020-10-14 05:27:27,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:27,747 INFO L93 Difference]: Finished difference Result 1118 states and 1461 transitions. [2020-10-14 05:27:27,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:27:27,747 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-14 05:27:27,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:27,749 INFO L225 Difference]: With dead ends: 1118 [2020-10-14 05:27:27,749 INFO L226 Difference]: Without dead ends: 1094 [2020-10-14 05:27:27,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:27:27,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2020-10-14 05:27:27,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 974. [2020-10-14 05:27:27,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 974 states. [2020-10-14 05:27:27,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1227 transitions. [2020-10-14 05:27:27,790 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1227 transitions. Word has length 39 [2020-10-14 05:27:27,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:27,791 INFO L479 AbstractCegarLoop]: Abstraction has 974 states and 1227 transitions. [2020-10-14 05:27:27,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:27:27,791 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1227 transitions. [2020-10-14 05:27:27,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 05:27:27,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:27,792 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:27,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-14 05:27:27,792 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:27,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:27,792 INFO L82 PathProgramCache]: Analyzing trace with hash 819141758, now seen corresponding path program 31 times [2020-10-14 05:27:27,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:27,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666236265] [2020-10-14 05:27:27,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:27,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:27,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:27,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:28,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:29,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:32,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:32,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 05:27:32,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:27:32,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 05:27:32,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:32,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:32,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:27:32,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:27:32,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:27:32,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:32,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:32,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:32,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:32,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:32,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:32,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:32,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:32,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:32,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:32,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:32,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:32,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:32,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:32,984 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-14 05:27:32,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666236265] [2020-10-14 05:27:32,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:32,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:27:32,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801040117] [2020-10-14 05:27:32,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:27:32,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:32,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:27:32,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:27:32,986 INFO L87 Difference]: Start difference. First operand 974 states and 1227 transitions. Second operand 13 states. [2020-10-14 05:27:33,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:33,419 INFO L93 Difference]: Finished difference Result 1121 states and 1387 transitions. [2020-10-14 05:27:33,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:27:33,419 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-14 05:27:33,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:33,422 INFO L225 Difference]: With dead ends: 1121 [2020-10-14 05:27:33,422 INFO L226 Difference]: Without dead ends: 1098 [2020-10-14 05:27:33,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:27:33,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2020-10-14 05:27:33,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 967. [2020-10-14 05:27:33,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 967 states. [2020-10-14 05:27:33,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 1219 transitions. [2020-10-14 05:27:33,482 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 1219 transitions. Word has length 39 [2020-10-14 05:27:33,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:33,482 INFO L479 AbstractCegarLoop]: Abstraction has 967 states and 1219 transitions. [2020-10-14 05:27:33,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:27:33,483 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 1219 transitions. [2020-10-14 05:27:33,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 05:27:33,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:33,484 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:33,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-14 05:27:33,485 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:33,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:33,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1385008510, now seen corresponding path program 24 times [2020-10-14 05:27:33,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:33,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308514493] [2020-10-14 05:27:33,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:33,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:33,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:33,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:34,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:37,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:37,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 05:27:37,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:27:37,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3744 [2020-10-14 05:27:37,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:37,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:37,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 05:27:37,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:27:37,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 05:27:37,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:37,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:37,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:37,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:37,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:37,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:37,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:37,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:37,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:37,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:37,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:37,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:37,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:37,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:37,919 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:27:37,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308514493] [2020-10-14 05:27:37,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:37,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 05:27:37,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857552566] [2020-10-14 05:27:37,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 05:27:37,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:37,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 05:27:37,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:27:37,921 INFO L87 Difference]: Start difference. First operand 967 states and 1219 transitions. Second operand 28 states. [2020-10-14 05:27:39,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:39,964 INFO L93 Difference]: Finished difference Result 1981 states and 2612 transitions. [2020-10-14 05:27:39,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 05:27:39,964 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 39 [2020-10-14 05:27:39,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:39,970 INFO L225 Difference]: With dead ends: 1981 [2020-10-14 05:27:39,970 INFO L226 Difference]: Without dead ends: 1857 [2020-10-14 05:27:39,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:27:39,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2020-10-14 05:27:40,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 988. [2020-10-14 05:27:40,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 988 states. [2020-10-14 05:27:40,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 1249 transitions. [2020-10-14 05:27:40,041 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 1249 transitions. Word has length 39 [2020-10-14 05:27:40,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:40,041 INFO L479 AbstractCegarLoop]: Abstraction has 988 states and 1249 transitions. [2020-10-14 05:27:40,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 05:27:40,041 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 1249 transitions. [2020-10-14 05:27:40,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 05:27:40,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:40,043 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:40,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-14 05:27:40,044 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:40,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:40,044 INFO L82 PathProgramCache]: Analyzing trace with hash -2049757073, now seen corresponding path program 32 times [2020-10-14 05:27:40,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:40,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155123003] [2020-10-14 05:27:40,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:40,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:40,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:41,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:41,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 05:27:41,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:27:41,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1110 [2020-10-14 05:27:41,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:41,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:41,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:27:41,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:27:41,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 05:27:41,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:41,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:41,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:41,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:41,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:41,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:41,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:41,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:41,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:41,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:41,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:41,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:41,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:41,515 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-14 05:27:41,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155123003] [2020-10-14 05:27:41,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:41,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:27:41,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401165601] [2020-10-14 05:27:41,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:27:41,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:41,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:27:41,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:27:41,516 INFO L87 Difference]: Start difference. First operand 988 states and 1249 transitions. Second operand 17 states. [2020-10-14 05:27:44,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:44,329 INFO L93 Difference]: Finished difference Result 1023 states and 1284 transitions. [2020-10-14 05:27:44,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 05:27:44,329 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-14 05:27:44,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:44,331 INFO L225 Difference]: With dead ends: 1023 [2020-10-14 05:27:44,332 INFO L226 Difference]: Without dead ends: 940 [2020-10-14 05:27:44,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=101, Invalid=768, Unknown=1, NotChecked=0, Total=870 [2020-10-14 05:27:44,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2020-10-14 05:27:44,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 940. [2020-10-14 05:27:44,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 940 states. [2020-10-14 05:27:44,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1194 transitions. [2020-10-14 05:27:44,388 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1194 transitions. Word has length 40 [2020-10-14 05:27:44,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:44,389 INFO L479 AbstractCegarLoop]: Abstraction has 940 states and 1194 transitions. [2020-10-14 05:27:44,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:27:44,389 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1194 transitions. [2020-10-14 05:27:44,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 05:27:44,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:44,391 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:44,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-14 05:27:44,391 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:44,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:44,391 INFO L82 PathProgramCache]: Analyzing trace with hash -2043726609, now seen corresponding path program 33 times [2020-10-14 05:27:44,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:44,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327989795] [2020-10-14 05:27:44,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:44,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:44,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:44,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:45,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:46,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:49,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:49,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 05:27:49,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:27:49,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 05:27:49,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:49,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:49,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:27:49,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 05:27:49,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:27:49,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:49,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:49,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:49,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:49,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:49,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:49,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:49,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:49,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:49,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:49,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:49,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:49,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:49,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:27:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-14 05:27:49,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327989795] [2020-10-14 05:27:49,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:49,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:27:49,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777202784] [2020-10-14 05:27:49,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:27:49,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:49,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:27:49,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:27:49,761 INFO L87 Difference]: Start difference. First operand 940 states and 1194 transitions. Second operand 13 states. [2020-10-14 05:27:50,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:50,391 INFO L93 Difference]: Finished difference Result 2207 states and 2480 transitions. [2020-10-14 05:27:50,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:27:50,392 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-14 05:27:50,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:50,398 INFO L225 Difference]: With dead ends: 2207 [2020-10-14 05:27:50,398 INFO L226 Difference]: Without dead ends: 2201 [2020-10-14 05:27:50,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:27:50,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2201 states. [2020-10-14 05:27:50,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2201 to 1048. [2020-10-14 05:27:50,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1048 states. [2020-10-14 05:27:50,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1311 transitions. [2020-10-14 05:27:50,491 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1311 transitions. Word has length 40 [2020-10-14 05:27:50,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:50,491 INFO L479 AbstractCegarLoop]: Abstraction has 1048 states and 1311 transitions. [2020-10-14 05:27:50,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:27:50,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1311 transitions. [2020-10-14 05:27:50,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 05:27:50,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:50,495 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:50,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-14 05:27:50,495 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:50,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:50,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1867275763, now seen corresponding path program 25 times [2020-10-14 05:27:50,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:50,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715427529] [2020-10-14 05:27:50,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:50,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:50,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:50,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:51,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:53,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:53,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 05:27:53,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:27:53,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3194 [2020-10-14 05:27:53,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:53,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:53,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 05:27:53,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:27:53,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 05:27:53,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:54,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:54,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:54,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:54,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:54,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:54,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:54,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:54,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:54,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:54,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:54,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:54,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:54,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:27:54,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715427529] [2020-10-14 05:27:54,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:54,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 05:27:54,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351123512] [2020-10-14 05:27:54,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 05:27:54,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:54,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 05:27:54,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:27:54,711 INFO L87 Difference]: Start difference. First operand 1048 states and 1311 transitions. Second operand 29 states. [2020-10-14 05:27:56,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:56,948 INFO L93 Difference]: Finished difference Result 2135 states and 2793 transitions. [2020-10-14 05:27:56,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 05:27:56,949 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 40 [2020-10-14 05:27:56,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:56,955 INFO L225 Difference]: With dead ends: 2135 [2020-10-14 05:27:56,955 INFO L226 Difference]: Without dead ends: 1999 [2020-10-14 05:27:56,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:27:56,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1999 states. [2020-10-14 05:27:57,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1999 to 1069. [2020-10-14 05:27:57,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1069 states. [2020-10-14 05:27:57,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1341 transitions. [2020-10-14 05:27:57,019 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1341 transitions. Word has length 40 [2020-10-14 05:27:57,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:57,020 INFO L479 AbstractCegarLoop]: Abstraction has 1069 states and 1341 transitions. [2020-10-14 05:27:57,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 05:27:57,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1341 transitions. [2020-10-14 05:27:57,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 05:27:57,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:57,022 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:57,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-14 05:27:57,022 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:57,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:57,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1495998814, now seen corresponding path program 34 times [2020-10-14 05:27:57,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:57,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446527913] [2020-10-14 05:27:57,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:57,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:57,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:57,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:59,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:00,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:02,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:02,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 05:28:02,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:28:02,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 05:28:02,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:02,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:02,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:28:02,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:28:02,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 05:28:02,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:02,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:28:02,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:02,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:02,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:02,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:28:02,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:02,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:28:02,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:02,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:02,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:02,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:28:02,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:02,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:02,239 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-14 05:28:02,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446527913] [2020-10-14 05:28:02,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:28:02,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:28:02,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416768618] [2020-10-14 05:28:02,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:28:02,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:28:02,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:28:02,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:28:02,241 INFO L87 Difference]: Start difference. First operand 1069 states and 1341 transitions. Second operand 14 states. [2020-10-14 05:28:02,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:28:02,675 INFO L93 Difference]: Finished difference Result 1177 states and 1455 transitions. [2020-10-14 05:28:02,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:28:02,675 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-10-14 05:28:02,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:28:02,677 INFO L225 Difference]: With dead ends: 1177 [2020-10-14 05:28:02,677 INFO L226 Difference]: Without dead ends: 1153 [2020-10-14 05:28:02,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:28:02,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2020-10-14 05:28:02,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1062. [2020-10-14 05:28:02,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1062 states. [2020-10-14 05:28:02,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1333 transitions. [2020-10-14 05:28:02,716 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1333 transitions. Word has length 41 [2020-10-14 05:28:02,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:28:02,716 INFO L479 AbstractCegarLoop]: Abstraction has 1062 states and 1333 transitions. [2020-10-14 05:28:02,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:28:02,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1333 transitions. [2020-10-14 05:28:02,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 05:28:02,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:28:02,718 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:28:02,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-14 05:28:02,718 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:28:02,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:28:02,718 INFO L82 PathProgramCache]: Analyzing trace with hash 391126878, now seen corresponding path program 26 times [2020-10-14 05:28:02,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:28:02,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624336680] [2020-10-14 05:28:02,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:28:02,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:02,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:03,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:03,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:06,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:06,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 05:28:06,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:28:06,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3625 [2020-10-14 05:28:06,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:06,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:06,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 05:28:06,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:28:06,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 05:28:06,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:07,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:28:07,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:07,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:07,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:07,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:28:07,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:07,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:28:07,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:07,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:07,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:07,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:28:07,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:07,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:28:07,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624336680] [2020-10-14 05:28:07,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:28:07,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 05:28:07,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604296202] [2020-10-14 05:28:07,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 05:28:07,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:28:07,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 05:28:07,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:28:07,133 INFO L87 Difference]: Start difference. First operand 1062 states and 1333 transitions. Second operand 30 states. [2020-10-14 05:28:09,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:28:09,469 INFO L93 Difference]: Finished difference Result 2171 states and 2852 transitions. [2020-10-14 05:28:09,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 05:28:09,469 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 41 [2020-10-14 05:28:09,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:28:09,471 INFO L225 Difference]: With dead ends: 2171 [2020-10-14 05:28:09,471 INFO L226 Difference]: Without dead ends: 2035 [2020-10-14 05:28:09,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:28:09,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2020-10-14 05:28:09,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 1083. [2020-10-14 05:28:09,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1083 states. [2020-10-14 05:28:09,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 1363 transitions. [2020-10-14 05:28:09,517 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 1363 transitions. Word has length 41 [2020-10-14 05:28:09,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:28:09,517 INFO L479 AbstractCegarLoop]: Abstraction has 1083 states and 1363 transitions. [2020-10-14 05:28:09,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 05:28:09,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 1363 transitions. [2020-10-14 05:28:09,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 05:28:09,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:28:09,518 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:28:09,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-14 05:28:09,519 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:28:09,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:28:09,519 INFO L82 PathProgramCache]: Analyzing trace with hash -254718385, now seen corresponding path program 35 times [2020-10-14 05:28:09,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:28:09,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124790278] [2020-10-14 05:28:09,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:28:09,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:09,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:09,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:09,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:10,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:11,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:14,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:14,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 05:28:14,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:28:14,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 05:28:14,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:14,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:14,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:28:14,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 05:28:14,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:28:14,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:14,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:28:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:14,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:14,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:14,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:28:14,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:14,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:28:14,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:14,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:14,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:14,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:28:14,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:14,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:14,652 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-10-14 05:28:14,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124790278] [2020-10-14 05:28:14,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:28:14,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:28:14,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035898292] [2020-10-14 05:28:14,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:28:14,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:28:14,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:28:14,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:28:14,654 INFO L87 Difference]: Start difference. First operand 1083 states and 1363 transitions. Second operand 10 states. [2020-10-14 05:28:15,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:28:15,044 INFO L93 Difference]: Finished difference Result 1430 states and 1750 transitions. [2020-10-14 05:28:15,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:28:15,045 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-14 05:28:15,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:28:15,046 INFO L225 Difference]: With dead ends: 1430 [2020-10-14 05:28:15,046 INFO L226 Difference]: Without dead ends: 1248 [2020-10-14 05:28:15,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:28:15,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2020-10-14 05:28:15,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1010. [2020-10-14 05:28:15,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1010 states. [2020-10-14 05:28:15,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1261 transitions. [2020-10-14 05:28:15,094 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1261 transitions. Word has length 42 [2020-10-14 05:28:15,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:28:15,094 INFO L479 AbstractCegarLoop]: Abstraction has 1010 states and 1261 transitions. [2020-10-14 05:28:15,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:28:15,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1261 transitions. [2020-10-14 05:28:15,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 05:28:15,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:28:15,096 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:28:15,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-14 05:28:15,096 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:28:15,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:28:15,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1682132013, now seen corresponding path program 27 times [2020-10-14 05:28:15,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:28:15,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858555858] [2020-10-14 05:28:15,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:28:15,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:15,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:15,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:15,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:18,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:18,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 05:28:18,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:28:18,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3321 [2020-10-14 05:28:18,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:18,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:18,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 05:28:18,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:28:18,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 05:28:18,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:19,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:28:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:19,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:19,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:19,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:28:19,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:19,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:28:19,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:19,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:19,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:19,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:28:19,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:19,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:28:19,250 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:28:19,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858555858] [2020-10-14 05:28:19,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:28:19,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 05:28:19,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941659936] [2020-10-14 05:28:19,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 05:28:19,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:28:19,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 05:28:19,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:28:19,252 INFO L87 Difference]: Start difference. First operand 1010 states and 1261 transitions. Second operand 31 states. [2020-10-14 05:28:21,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:28:21,828 INFO L93 Difference]: Finished difference Result 2101 states and 2751 transitions. [2020-10-14 05:28:21,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 05:28:21,829 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 42 [2020-10-14 05:28:21,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:28:21,832 INFO L225 Difference]: With dead ends: 2101 [2020-10-14 05:28:21,832 INFO L226 Difference]: Without dead ends: 1962 [2020-10-14 05:28:21,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:28:21,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2020-10-14 05:28:21,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1030. [2020-10-14 05:28:21,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1030 states. [2020-10-14 05:28:21,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 1289 transitions. [2020-10-14 05:28:21,886 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 1289 transitions. Word has length 42 [2020-10-14 05:28:21,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:28:21,886 INFO L479 AbstractCegarLoop]: Abstraction has 1030 states and 1289 transitions. [2020-10-14 05:28:21,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 05:28:21,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 1289 transitions. [2020-10-14 05:28:21,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 05:28:21,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:28:21,887 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:28:21,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-14 05:28:21,888 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:28:21,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:28:21,888 INFO L82 PathProgramCache]: Analyzing trace with hash 200318078, now seen corresponding path program 36 times [2020-10-14 05:28:21,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:28:21,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000927860] [2020-10-14 05:28:21,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:28:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:21,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:21,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:22,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:24,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:24,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:26,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:26,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 05:28:26,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:28:26,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 05:28:26,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:26,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:26,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:28:26,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:28:26,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 05:28:26,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:29,513 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 31 DAG size of output: 19 [2020-10-14 05:28:30,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:28:30,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:30,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:30,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:30,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:28:30,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:30,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:28:30,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:30,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:30,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:30,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:28:30,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:30,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:28:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-14 05:28:30,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000927860] [2020-10-14 05:28:30,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:28:30,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:28:30,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80436923] [2020-10-14 05:28:30,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:28:30,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:28:30,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:28:30,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:28:30,213 INFO L87 Difference]: Start difference. First operand 1030 states and 1289 transitions. Second operand 19 states. [2020-10-14 05:28:44,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:28:44,761 INFO L93 Difference]: Finished difference Result 1068 states and 1327 transitions. [2020-10-14 05:28:44,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 05:28:44,762 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-10-14 05:28:44,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:28:44,763 INFO L225 Difference]: With dead ends: 1068 [2020-10-14 05:28:44,763 INFO L226 Difference]: Without dead ends: 976 [2020-10-14 05:28:44,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=109, Invalid=1012, Unknown=1, NotChecked=0, Total=1122 [2020-10-14 05:28:44,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2020-10-14 05:28:44,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 976. [2020-10-14 05:28:44,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 976 states. [2020-10-14 05:28:44,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1228 transitions. [2020-10-14 05:28:44,830 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1228 transitions. Word has length 43 [2020-10-14 05:28:44,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:28:44,831 INFO L479 AbstractCegarLoop]: Abstraction has 976 states and 1228 transitions. [2020-10-14 05:28:44,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:28:44,831 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1228 transitions. [2020-10-14 05:28:44,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 05:28:44,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:28:44,833 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:28:44,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-14 05:28:44,833 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:28:44,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:28:44,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1246381762, now seen corresponding path program 28 times [2020-10-14 05:28:44,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:28:44,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467124058] [2020-10-14 05:28:44,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:28:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:44,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:45,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:46,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking...