/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-tiling/rew.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:26:40,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:26:40,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:26:40,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:26:40,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:26:40,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:26:40,789 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:26:40,791 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:26:40,793 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:26:40,794 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:26:40,795 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:26:40,796 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:26:40,796 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:26:40,798 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:26:40,799 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:26:40,800 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:26:40,801 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:26:40,802 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:26:40,804 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:26:40,806 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:26:40,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:26:40,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:26:40,814 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:26:40,815 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:26:40,820 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:26:40,821 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:26:40,821 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:26:40,822 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:26:40,824 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:26:40,826 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:26:40,826 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:26:40,828 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:26:40,829 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:26:40,830 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:26:40,831 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:26:40,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:26:40,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:26:40,833 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:26:40,834 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:26:40,835 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:26:40,837 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:26:40,838 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 05:26:40,882 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:26:40,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:26:40,884 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:26:40,884 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:26:40,884 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:26:40,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:26:40,885 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:26:40,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:26:40,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:26:40,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:26:40,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:26:40,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:26:40,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:26:40,888 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:26:40,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:26:40,888 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:26:40,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:26:40,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:26:40,889 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:26:40,889 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:26:40,889 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:26:40,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:26:40,890 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:26:40,890 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:26:40,890 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:26:40,890 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:26:40,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:26:40,891 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:26:40,891 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:26:40,891 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 05:26:41,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:26:41,242 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:26:41,245 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:26:41,247 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:26:41,248 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:26:41,248 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/rew.c [2020-10-13 05:26:41,312 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/210313c28/67d9d478168440eabd1e32854edd8578/FLAGf6ce2871c [2020-10-13 05:26:41,750 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:26:41,751 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-tiling/rew.c [2020-10-13 05:26:41,757 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/210313c28/67d9d478168440eabd1e32854edd8578/FLAGf6ce2871c [2020-10-13 05:26:42,170 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/210313c28/67d9d478168440eabd1e32854edd8578 [2020-10-13 05:26:42,181 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:26:42,184 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:26:42,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:26:42,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:26:42,191 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:26:42,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:26:42" (1/1) ... [2020-10-13 05:26:42,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25cec9cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:26:42, skipping insertion in model container [2020-10-13 05:26:42,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:26:42" (1/1) ... [2020-10-13 05:26:42,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:26:42,226 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:26:42,444 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:26:42,456 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:26:42,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:26:42,491 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:26:42,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:26:42 WrapperNode [2020-10-13 05:26:42,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:26:42,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:26:42,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:26:42,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:26:42,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:26:42" (1/1) ... [2020-10-13 05:26:42,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:26:42" (1/1) ... [2020-10-13 05:26:42,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:26:42" (1/1) ... [2020-10-13 05:26:42,592 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:26:42" (1/1) ... [2020-10-13 05:26:42,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:26:42" (1/1) ... [2020-10-13 05:26:42,604 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:26:42" (1/1) ... [2020-10-13 05:26:42,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:26:42" (1/1) ... [2020-10-13 05:26:42,608 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:26:42,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:26:42,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:26:42,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:26:42,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:26:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:26:42,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:26:42,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:26:42,664 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 05:26:42,665 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:26:42,665 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:26:42,665 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:26:42,665 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 05:26:42,665 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 05:26:42,665 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:26:42,666 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 05:26:42,666 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 05:26:42,666 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:26:42,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 05:26:42,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 05:26:42,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 05:26:42,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:26:42,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:26:42,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:26:42,919 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:26:42,919 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 05:26:42,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:26:42 BoogieIcfgContainer [2020-10-13 05:26:42,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:26:42,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:26:42,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:26:42,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:26:42,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:26:42" (1/3) ... [2020-10-13 05:26:42,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4652d2dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:26:42, skipping insertion in model container [2020-10-13 05:26:42,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:26:42" (2/3) ... [2020-10-13 05:26:42,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4652d2dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:26:42, skipping insertion in model container [2020-10-13 05:26:42,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:26:42" (3/3) ... [2020-10-13 05:26:42,934 INFO L109 eAbstractionObserver]: Analyzing ICFG rew.c [2020-10-13 05:26:42,947 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:26:42,955 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:26:42,971 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:26:42,998 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:26:42,998 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:26:42,998 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:26:42,998 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:26:42,998 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:26:42,998 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:26:42,999 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:26:42,999 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:26:43,039 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-13 05:26:43,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 05:26:43,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:26:43,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:26:43,052 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:26:43,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:26:43,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1564765221, now seen corresponding path program 1 times [2020-10-13 05:26:43,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:26:43,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082411385] [2020-10-13 05:26:43,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:26:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:43,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:43,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:43,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 05:26:43,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:43,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-13 05:26:43,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:43,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:26:43,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:26:43,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 05:26:43,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 05:26:43,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:26:43,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:43,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:43,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:43,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:26:43,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:43,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 05:26:43,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:43,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:26:43,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:43,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:26:43,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:26:43,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:26:43,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082411385] [2020-10-13 05:26:43,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:26:43,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:26:43,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454394099] [2020-10-13 05:26:43,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:26:43,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:26:43,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:26:43,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:26:43,523 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 4 states. [2020-10-13 05:26:43,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:26:43,674 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2020-10-13 05:26:43,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 05:26:43,676 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-13 05:26:43,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:26:43,685 INFO L225 Difference]: With dead ends: 51 [2020-10-13 05:26:43,686 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 05:26:43,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:26:43,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 05:26:43,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-10-13 05:26:43,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 05:26:43,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-13 05:26:43,734 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2020-10-13 05:26:43,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:26:43,734 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-13 05:26:43,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:26:43,735 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-13 05:26:43,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 05:26:43,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:26:43,736 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:26:43,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:26:43,736 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:26:43,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:26:43,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1138009376, now seen corresponding path program 1 times [2020-10-13 05:26:43,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:26:43,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687172277] [2020-10-13 05:26:43,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:26:43,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:43,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:43,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:43,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:44,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:44,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 05:26:44,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:26:44,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 476 [2020-10-13 05:26:44,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:44,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:26:44,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 05:26:44,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 05:26:44,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:26:44,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:26:44,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:44,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:44,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:44,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:26:44,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:44,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:26:44,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:44,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:26:44,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:44,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:26:44,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:44,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:26:44,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687172277] [2020-10-13 05:26:44,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:26:44,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 05:26:44,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5716876] [2020-10-13 05:26:44,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:26:44,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:26:44,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:26:44,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:26:44,297 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2020-10-13 05:26:44,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:26:44,378 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-10-13 05:26:44,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 05:26:44,379 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-13 05:26:44,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:26:44,380 INFO L225 Difference]: With dead ends: 38 [2020-10-13 05:26:44,381 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 05:26:44,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:26:44,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 05:26:44,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-13 05:26:44,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 05:26:44,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-13 05:26:44,389 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 18 [2020-10-13 05:26:44,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:26:44,390 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-13 05:26:44,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:26:44,390 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-13 05:26:44,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 05:26:44,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:26:44,391 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:26:44,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:26:44,392 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:26:44,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:26:44,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1844234969, now seen corresponding path program 1 times [2020-10-13 05:26:44,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:26:44,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161911724] [2020-10-13 05:26:44,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:26:44,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:44,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:44,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:44,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 05:26:44,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:44,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-13 05:26:44,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:44,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:26:44,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:26:44,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 05:26:44,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:44,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:26:44,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:44,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:44,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:44,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:26:44,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:44,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:26:44,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:44,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:26:44,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:44,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:26:44,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:44,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:26:44,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161911724] [2020-10-13 05:26:44,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:26:44,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:26:44,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680222127] [2020-10-13 05:26:44,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:26:44,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:26:44,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:26:44,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:26:44,773 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 10 states. [2020-10-13 05:26:45,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:26:45,115 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-10-13 05:26:45,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:26:45,116 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-10-13 05:26:45,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:26:45,120 INFO L225 Difference]: With dead ends: 49 [2020-10-13 05:26:45,120 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 05:26:45,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:26:45,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 05:26:45,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-10-13 05:26:45,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 05:26:45,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-13 05:26:45,141 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 22 [2020-10-13 05:26:45,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:26:45,142 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-13 05:26:45,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:26:45,143 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-13 05:26:45,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 05:26:45,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:26:45,145 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:26:45,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:26:45,146 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:26:45,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:26:45,147 INFO L82 PathProgramCache]: Analyzing trace with hash 467523796, now seen corresponding path program 2 times [2020-10-13 05:26:45,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:26:45,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051280412] [2020-10-13 05:26:45,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:26:45,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:45,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:45,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:45,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:45,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 05:26:45,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:26:45,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 605 [2020-10-13 05:26:45,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:45,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 05:26:45,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:26:45,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 05:26:45,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:26:46,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:26:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:46,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:46,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:46,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:26:46,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:46,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:26:46,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:46,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:26:46,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:46,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:26:46,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:26:46,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051280412] [2020-10-13 05:26:46,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:26:46,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 05:26:46,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7295320] [2020-10-13 05:26:46,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 05:26:46,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:26:46,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 05:26:46,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:26:46,151 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 13 states. [2020-10-13 05:26:46,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:26:46,491 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2020-10-13 05:26:46,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 05:26:46,492 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-10-13 05:26:46,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:26:46,494 INFO L225 Difference]: With dead ends: 54 [2020-10-13 05:26:46,495 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 05:26:46,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:26:46,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 05:26:46,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 33. [2020-10-13 05:26:46,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 05:26:46,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-13 05:26:46,504 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 26 [2020-10-13 05:26:46,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:26:46,504 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-13 05:26:46,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 05:26:46,505 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-13 05:26:46,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 05:26:46,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:26:46,506 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:26:46,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:26:46,506 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:26:46,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:26:46,507 INFO L82 PathProgramCache]: Analyzing trace with hash 2097899152, now seen corresponding path program 1 times [2020-10-13 05:26:46,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:26:46,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387578911] [2020-10-13 05:26:46,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:26:46,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:46,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:46,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:46,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 05:26:46,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:46,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-13 05:26:46,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:46,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 05:26:46,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:26:46,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 05:26:46,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:46,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:26:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:46,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:46,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:46,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:26:46,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:46,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:26:46,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:46,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:26:46,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:46,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:26:46,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:46,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-13 05:26:46,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:46,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:46,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:46,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:26:46,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:46,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:26:46,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:46,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:26:46,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:46,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:26:46,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:26:46,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387578911] [2020-10-13 05:26:46,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:26:46,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 05:26:46,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008146743] [2020-10-13 05:26:46,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 05:26:46,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:26:46,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 05:26:46,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:26:46,825 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 11 states. [2020-10-13 05:26:47,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:26:47,179 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2020-10-13 05:26:47,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:26:47,179 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-13 05:26:47,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:26:47,181 INFO L225 Difference]: With dead ends: 64 [2020-10-13 05:26:47,181 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 05:26:47,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:26:47,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 05:26:47,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-13 05:26:47,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 05:26:47,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2020-10-13 05:26:47,193 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 30 [2020-10-13 05:26:47,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:26:47,194 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2020-10-13 05:26:47,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 05:26:47,194 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2020-10-13 05:26:47,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 05:26:47,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:26:47,196 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:26:47,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:26:47,197 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:26:47,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:26:47,197 INFO L82 PathProgramCache]: Analyzing trace with hash -2101851765, now seen corresponding path program 2 times [2020-10-13 05:26:47,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:26:47,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888714890] [2020-10-13 05:26:47,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:26:47,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:47,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:47,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:47,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 05:26:47,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:47,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-13 05:26:47,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:47,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:26:47,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:26:47,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 05:26:47,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:47,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:26:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:47,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:47,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:47,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:26:47,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:47,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:26:47,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:47,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:26:47,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:47,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:26:47,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:47,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 05:26:47,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:47,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:47,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:47,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:26:47,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:47,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:26:47,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:47,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:26:47,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:47,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:26:47,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 05:26:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:26:47,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888714890] [2020-10-13 05:26:47,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:26:47,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:26:47,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694262817] [2020-10-13 05:26:47,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:26:47,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:26:47,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:26:47,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:26:47,656 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 12 states. [2020-10-13 05:26:48,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:26:48,070 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2020-10-13 05:26:48,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 05:26:48,072 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-13 05:26:48,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:26:48,073 INFO L225 Difference]: With dead ends: 77 [2020-10-13 05:26:48,073 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 05:26:48,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:26:48,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 05:26:48,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-13 05:26:48,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 05:26:48,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-10-13 05:26:48,102 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 34 [2020-10-13 05:26:48,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:26:48,102 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-10-13 05:26:48,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:26:48,103 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-10-13 05:26:48,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 05:26:48,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:26:48,104 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:26:48,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:26:48,104 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:26:48,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:26:48,105 INFO L82 PathProgramCache]: Analyzing trace with hash -95790265, now seen corresponding path program 3 times [2020-10-13 05:26:48,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:26:48,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962433608] [2020-10-13 05:26:48,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:26:48,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:48,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:48,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:48,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:48,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:48,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:48,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 05:26:48,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:26:48,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 757 [2020-10-13 05:26:48,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:48,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 05:26:48,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:26:48,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 05:26:48,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:48,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:26:48,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:48,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:48,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:48,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:26:48,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:48,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:26:48,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:48,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:26:48,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:48,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:26:48,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:48,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-13 05:26:48,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:48,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:48,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:48,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:26:48,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:48,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:26:48,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:48,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:26:48,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:48,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:26:48,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:48,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-13 05:26:48,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:48,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:48,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:48,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:26:48,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:48,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:26:48,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:48,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:26:48,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:48,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:26:48,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:48,984 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:26:48,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962433608] [2020-10-13 05:26:48,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:26:48,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 05:26:48,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889196609] [2020-10-13 05:26:48,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 05:26:48,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:26:48,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 05:26:48,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:26:48,986 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 9 states. [2020-10-13 05:26:49,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:26:49,171 INFO L93 Difference]: Finished difference Result 121 states and 134 transitions. [2020-10-13 05:26:49,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 05:26:49,171 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-10-13 05:26:49,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:26:49,173 INFO L225 Difference]: With dead ends: 121 [2020-10-13 05:26:49,173 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 05:26:49,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:26:49,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 05:26:49,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2020-10-13 05:26:49,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 05:26:49,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-10-13 05:26:49,183 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 38 [2020-10-13 05:26:49,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:26:49,183 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-10-13 05:26:49,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 05:26:49,184 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-10-13 05:26:49,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 05:26:49,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:26:49,185 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:26:49,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:26:49,186 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:26:49,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:26:49,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1358247686, now seen corresponding path program 4 times [2020-10-13 05:26:49,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:26:49,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187216062] [2020-10-13 05:26:49,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:26:49,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:49,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:49,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:49,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:49,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 05:26:49,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:26:49,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 511 [2020-10-13 05:26:49,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:49,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 05:26:49,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:26:49,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 05:26:49,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:26:49,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:26:49,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:49,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:49,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:49,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:26:49,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:49,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:26:49,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:49,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:26:49,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:49,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:26:49,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:49,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-13 05:26:50,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:50,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:50,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:50,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:26:50,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:50,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:26:50,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:50,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:26:50,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:50,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:26:50,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:26:50,016 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:26:50,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187216062] [2020-10-13 05:26:50,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:26:50,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 05:26:50,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512330007] [2020-10-13 05:26:50,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 05:26:50,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:26:50,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 05:26:50,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:26:50,019 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 15 states. [2020-10-13 05:26:50,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:26:50,604 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2020-10-13 05:26:50,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:26:50,605 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-13 05:26:50,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:26:50,606 INFO L225 Difference]: With dead ends: 68 [2020-10-13 05:26:50,606 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 05:26:50,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:26:50,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 05:26:50,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 45. [2020-10-13 05:26:50,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 05:26:50,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-13 05:26:50,616 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 38 [2020-10-13 05:26:50,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:26:50,616 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-13 05:26:50,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 05:26:50,616 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-13 05:26:50,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 05:26:50,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:26:50,618 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:26:50,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:26:50,618 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:26:50,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:26:50,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1561203522, now seen corresponding path program 5 times [2020-10-13 05:26:50,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:26:50,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536680735] [2020-10-13 05:26:50,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:26:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:50,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:50,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:50,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:51,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:51,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 05:26:51,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:26:51,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 937 [2020-10-13 05:26:51,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:51,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 05:26:51,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:26:51,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 05:26:51,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:52,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:26:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:52,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:52,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:52,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:26:52,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:52,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:26:52,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:52,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:26:52,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:52,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:26:52,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:52,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 05:26:52,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:52,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:52,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:52,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:26:52,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:52,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:26:52,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:52,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:26:52,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:52,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:26:52,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:52,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 05:26:52,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:52,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:52,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:52,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:26:52,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:52,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 05:26:52,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:52,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:26:52,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:52,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:26:52,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:26:52,120 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:26:52,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536680735] [2020-10-13 05:26:52,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:26:52,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 05:26:52,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33595835] [2020-10-13 05:26:52,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 05:26:52,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:26:52,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 05:26:52,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:26:52,137 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 21 states. [2020-10-13 05:26:53,559 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-13 05:26:54,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:26:54,363 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2020-10-13 05:26:54,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 05:26:54,363 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 42 [2020-10-13 05:26:54,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:26:54,365 INFO L225 Difference]: With dead ends: 83 [2020-10-13 05:26:54,365 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 05:26:54,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=335, Invalid=1921, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 05:26:54,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 05:26:54,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 65. [2020-10-13 05:26:54,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 05:26:54,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2020-10-13 05:26:54,379 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 42 [2020-10-13 05:26:54,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:26:54,379 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2020-10-13 05:26:54,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 05:26:54,379 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2020-10-13 05:26:54,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 05:26:54,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:26:54,381 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:26:54,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:26:54,381 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:26:54,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:26:54,382 INFO L82 PathProgramCache]: Analyzing trace with hash -957393475, now seen corresponding path program 6 times [2020-10-13 05:26:54,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:26:54,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941647699] [2020-10-13 05:26:54,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:26:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:54,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:54,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:54,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:55,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:55,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 05:26:55,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:26:55,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1551 [2020-10-13 05:26:55,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:55,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:26:55,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:26:55,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 05:26:55,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:26:56,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:26:56,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:56,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:56,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:56,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:26:56,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:56,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:26:56,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:56,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:26:56,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:56,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:26:56,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:26:56,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-13 05:26:56,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:56,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:56,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:56,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:26:56,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:56,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:26:56,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:56,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:26:56,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:56,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:26:56,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:26:56,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 05:26:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:56,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:56,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:56,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:26:56,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:56,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:26:56,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:56,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:26:56,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:56,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:26:56,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:26:56,241 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:26:56,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941647699] [2020-10-13 05:26:56,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:26:56,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:26:56,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987279675] [2020-10-13 05:26:56,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:26:56,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:26:56,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:26:56,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:26:56,245 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 14 states. [2020-10-13 05:26:56,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:26:56,809 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2020-10-13 05:26:56,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 05:26:56,810 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-10-13 05:26:56,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:26:56,812 INFO L225 Difference]: With dead ends: 95 [2020-10-13 05:26:56,812 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 05:26:56,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:26:56,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 05:26:56,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2020-10-13 05:26:56,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 05:26:56,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2020-10-13 05:26:56,827 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 46 [2020-10-13 05:26:56,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:26:56,827 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2020-10-13 05:26:56,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:26:56,827 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2020-10-13 05:26:56,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 05:26:56,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:26:56,829 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:26:56,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:26:56,829 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:26:56,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:26:56,829 INFO L82 PathProgramCache]: Analyzing trace with hash -898222599, now seen corresponding path program 7 times [2020-10-13 05:26:56,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:26:56,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813020953] [2020-10-13 05:26:56,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:26:56,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:56,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:56,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:57,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:57,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:57,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:57,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:57,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:57,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:59,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:59,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 05:26:59,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:26:59,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2173 [2020-10-13 05:26:59,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:59,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:26:59,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:26:59,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 05:26:59,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:26:59,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:26:59,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:59,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:59,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:59,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:26:59,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:59,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:26:59,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:59,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:26:59,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:59,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:26:59,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:59,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 05:26:59,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:59,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:59,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:59,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:26:59,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:59,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:26:59,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:59,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:26:59,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:59,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:26:59,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:59,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 05:26:59,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:59,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:59,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:59,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:26:59,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:59,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:26:59,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:59,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:26:59,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:59,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:26:59,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:59,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 05:26:59,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:59,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:59,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:59,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:26:59,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:59,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:26:59,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:59,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:26:59,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:59,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:26:59,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 05:26:59,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813020953] [2020-10-13 05:26:59,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:26:59,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:26:59,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208510745] [2020-10-13 05:26:59,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:26:59,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:26:59,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:26:59,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:26:59,147 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand 12 states. [2020-10-13 05:26:59,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:26:59,501 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2020-10-13 05:26:59,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:26:59,502 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-10-13 05:26:59,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:26:59,503 INFO L225 Difference]: With dead ends: 122 [2020-10-13 05:26:59,503 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 05:26:59,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:26:59,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 05:26:59,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 71. [2020-10-13 05:26:59,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 05:26:59,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-10-13 05:26:59,529 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 50 [2020-10-13 05:26:59,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:26:59,529 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-10-13 05:26:59,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:26:59,530 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-10-13 05:26:59,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 05:26:59,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:26:59,536 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:26:59,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 05:26:59,536 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:26:59,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:26:59,536 INFO L82 PathProgramCache]: Analyzing trace with hash 19194552, now seen corresponding path program 8 times [2020-10-13 05:26:59,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:26:59,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415162540] [2020-10-13 05:26:59,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:26:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:59,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:59,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:00,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:00,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:01,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:01,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 05:27:01,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:27:01,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2119 [2020-10-13 05:27:01,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:01,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 05:27:01,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:27:01,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 05:27:01,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:01,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:27:01,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:01,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:01,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:01,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:27:01,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:01,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:27:01,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:01,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:27:01,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:01,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:27:01,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:01,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 05:27:01,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:01,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:01,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:01,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:27:01,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:01,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:27:01,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:01,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:27:01,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:01,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:27:01,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:01,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 05:27:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:01,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:01,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:01,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:27:01,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:01,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:27:01,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:01,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:27:01,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:01,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:27:01,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:01,960 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 52 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:27:01,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415162540] [2020-10-13 05:27:01,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:27:01,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 05:27:01,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110078188] [2020-10-13 05:27:01,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 05:27:01,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:27:01,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 05:27:01,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:27:01,963 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 17 states. [2020-10-13 05:27:02,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:27:02,606 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2020-10-13 05:27:02,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:27:02,613 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2020-10-13 05:27:02,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:27:02,614 INFO L225 Difference]: With dead ends: 105 [2020-10-13 05:27:02,614 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 05:27:02,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:27:02,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 05:27:02,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 75. [2020-10-13 05:27:02,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 05:27:02,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2020-10-13 05:27:02,626 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 50 [2020-10-13 05:27:02,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:27:02,626 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2020-10-13 05:27:02,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 05:27:02,627 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2020-10-13 05:27:02,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 05:27:02,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:27:02,628 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:27:02,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 05:27:02,628 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:27:02,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:27:02,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1529426572, now seen corresponding path program 9 times [2020-10-13 05:27:02,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:27:02,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922223439] [2020-10-13 05:27:02,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:27:02,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:02,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:02,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:02,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:03,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:03,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:03,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:03,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:05,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:05,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 05:27:05,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:27:05,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2739 [2020-10-13 05:27:05,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:05,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 05:27:05,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:27:05,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 05:27:05,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:06,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:27:06,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:06,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:06,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:06,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:27:06,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:06,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:27:06,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:06,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:27:06,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:06,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:27:06,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:06,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-13 05:27:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:06,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:06,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:06,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:27:06,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:06,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:27:06,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:06,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:27:06,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:06,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:27:06,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:06,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 05:27:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:06,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:06,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:06,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:27:06,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:06,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 05:27:06,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:06,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:27:06,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:06,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:27:06,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:06,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 05:27:06,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:06,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:06,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:06,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:27:06,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:06,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 05:27:06,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:06,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:27:06,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:06,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:27:06,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 18 proven. 41 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 05:27:06,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922223439] [2020-10-13 05:27:06,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:27:06,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 05:27:06,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600367759] [2020-10-13 05:27:06,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 05:27:06,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:27:06,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 05:27:06,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:27:06,633 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand 26 states. [2020-10-13 05:27:07,145 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-13 05:27:07,929 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-13 05:27:08,989 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-13 05:27:09,228 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-13 05:27:09,533 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-13 05:27:09,847 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-13 05:27:10,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:27:10,224 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2020-10-13 05:27:10,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 05:27:10,224 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 54 [2020-10-13 05:27:10,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:27:10,225 INFO L225 Difference]: With dead ends: 103 [2020-10-13 05:27:10,225 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 05:27:10,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=475, Invalid=2387, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 05:27:10,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 05:27:10,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2020-10-13 05:27:10,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 05:27:10,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-10-13 05:27:10,238 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 54 [2020-10-13 05:27:10,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:27:10,238 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-10-13 05:27:10,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 05:27:10,238 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-10-13 05:27:10,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 05:27:10,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:27:10,239 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:27:10,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 05:27:10,240 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:27:10,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:27:10,240 INFO L82 PathProgramCache]: Analyzing trace with hash -612009421, now seen corresponding path program 10 times [2020-10-13 05:27:10,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:27:10,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90960954] [2020-10-13 05:27:10,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:27:10,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:10,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:10,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:10,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:10,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:11,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:12,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:12,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 05:27:12,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:27:12,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2004 [2020-10-13 05:27:12,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:12,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 05:27:12,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:27:12,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 05:27:12,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:13,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:27:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:13,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:13,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:13,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:27:13,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:13,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:27:13,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:13,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:27:13,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:13,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:27:13,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:13,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 05:27:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:13,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:13,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:13,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:27:13,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:13,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:27:13,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:13,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:27:13,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:13,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:27:13,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:13,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 05:27:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:13,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:13,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:13,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:27:13,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:13,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:27:13,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:13,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:27:13,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:13,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:27:13,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:13,292 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 6 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:27:13,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90960954] [2020-10-13 05:27:13,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:27:13,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 05:27:13,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729771562] [2020-10-13 05:27:13,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 05:27:13,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:27:13,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 05:27:13,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:27:13,297 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 25 states. [2020-10-13 05:27:15,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:27:15,010 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2020-10-13 05:27:15,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 05:27:15,012 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 54 [2020-10-13 05:27:15,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:27:15,014 INFO L225 Difference]: With dead ends: 85 [2020-10-13 05:27:15,014 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 05:27:15,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=383, Invalid=1969, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 05:27:15,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 05:27:15,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2020-10-13 05:27:15,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 05:27:15,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2020-10-13 05:27:15,030 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 54 [2020-10-13 05:27:15,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:27:15,031 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2020-10-13 05:27:15,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 05:27:15,031 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2020-10-13 05:27:15,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 05:27:15,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:27:15,032 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:27:15,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 05:27:15,032 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:27:15,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:27:15,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1512493201, now seen corresponding path program 11 times [2020-10-13 05:27:15,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:27:15,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912143604] [2020-10-13 05:27:15,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:27:15,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:15,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:15,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:15,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:15,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:15,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:16,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:16,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:17,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:17,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 05:27:17,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:27:17,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2543 [2020-10-13 05:27:17,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:17,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 05:27:17,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:27:17,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 05:27:17,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:18,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:27:18,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:18,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:18,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:18,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:27:18,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:18,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:27:18,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:18,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:27:18,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:18,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:27:18,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:18,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 05:27:18,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:18,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:18,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:18,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:27:18,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:18,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:27:18,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:18,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:27:18,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:18,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:27:18,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:18,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 05:27:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:18,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:18,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:18,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:27:18,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:18,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:27:18,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:18,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:27:18,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:18,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:27:18,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:18,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 05:27:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:18,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:18,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:18,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:27:18,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:18,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:27:18,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:18,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:27:18,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:18,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:27:18,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 11 proven. 64 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 05:27:18,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912143604] [2020-10-13 05:27:18,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:27:18,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 05:27:18,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671641365] [2020-10-13 05:27:18,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 05:27:18,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:27:18,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 05:27:18,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:27:18,679 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand 27 states. [2020-10-13 05:27:19,975 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-10-13 05:27:20,247 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-10-13 05:27:21,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:27:21,894 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2020-10-13 05:27:21,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 05:27:21,895 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 58 [2020-10-13 05:27:21,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:27:21,897 INFO L225 Difference]: With dead ends: 115 [2020-10-13 05:27:21,897 INFO L226 Difference]: Without dead ends: 113 [2020-10-13 05:27:21,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=452, Invalid=2854, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 05:27:21,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-13 05:27:21,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 89. [2020-10-13 05:27:21,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-13 05:27:21,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2020-10-13 05:27:21,911 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 58 [2020-10-13 05:27:21,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:27:21,912 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2020-10-13 05:27:21,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 05:27:21,912 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2020-10-13 05:27:21,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 05:27:21,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:27:21,913 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:27:21,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 05:27:21,913 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:27:21,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:27:21,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1164698646, now seen corresponding path program 12 times [2020-10-13 05:27:21,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:27:21,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004336064] [2020-10-13 05:27:21,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:27:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:21,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:21,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:22,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:22,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:24,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:24,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:24,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:25,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:25,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:25,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 05:27:25,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:27:25,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3586 [2020-10-13 05:27:25,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:25,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 05:27:25,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:27:25,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 05:27:25,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:25,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:27:25,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:25,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:25,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:25,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:27:25,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:25,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:27:25,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:25,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:27:25,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:25,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:27:25,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:25,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 05:27:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:25,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:25,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:25,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:27:25,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:25,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:27:25,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:25,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:27:25,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:25,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:27:25,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:25,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 05:27:25,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:25,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:25,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:25,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:27:25,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:25,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:27:25,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:25,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:27:25,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:25,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:27:25,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:25,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 05:27:25,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:25,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:25,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:25,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:27:25,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:25,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:27:25,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:25,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:27:25,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:25,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:27:25,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 6 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 05:27:25,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004336064] [2020-10-13 05:27:25,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:27:25,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 05:27:25,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988452045] [2020-10-13 05:27:25,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 05:27:25,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:27:25,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 05:27:25,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:27:25,940 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand 19 states. [2020-10-13 05:27:26,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:27:26,898 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2020-10-13 05:27:26,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 05:27:26,899 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 62 [2020-10-13 05:27:26,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:27:26,900 INFO L225 Difference]: With dead ends: 102 [2020-10-13 05:27:26,900 INFO L226 Difference]: Without dead ends: 100 [2020-10-13 05:27:26,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:27:26,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-13 05:27:26,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2020-10-13 05:27:26,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-13 05:27:26,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2020-10-13 05:27:26,913 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 62 [2020-10-13 05:27:26,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:27:26,913 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2020-10-13 05:27:26,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 05:27:26,913 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2020-10-13 05:27:26,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 05:27:26,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:27:26,914 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:27:26,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 05:27:26,915 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:27:26,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:27:26,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1536371418, now seen corresponding path program 13 times [2020-10-13 05:27:26,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:27:26,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722422803] [2020-10-13 05:27:26,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:27:26,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:26,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:27,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:27,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:27,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:27,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:28,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:28,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:28,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:28,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:28,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:28,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:29,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:29,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:31,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:31,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 05:27:31,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 05:27:31,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4503 [2020-10-13 05:27:31,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:31,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 05:27:31,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:27:31,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-13 05:27:31,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:32,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:27:32,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:32,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:32,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:32,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:27:32,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:32,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:27:32,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:32,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:27:32,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:32,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:27:32,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:32,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 05:27:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:32,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:32,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:32,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:27:32,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:32,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:27:32,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:32,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:27:32,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:32,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:27:32,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:32,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 05:27:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:32,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:32,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:32,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:27:32,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:32,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:27:32,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:32,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:27:32,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:32,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:27:32,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:32,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 05:27:32,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:32,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:32,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:32,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:27:32,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:32,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:27:32,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:32,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:27:32,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:32,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:27:32,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:32,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 05:27:32,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:32,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:32,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:32,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:27:32,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:32,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:27:32,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:32,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:27:32,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:32,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:27:32,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:32,473 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 05:27:32,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722422803] [2020-10-13 05:27:32,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:27:32,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 05:27:32,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912854747] [2020-10-13 05:27:32,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 05:27:32,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:27:32,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 05:27:32,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:27:32,476 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand 25 states. [2020-10-13 05:27:35,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:27:35,302 INFO L93 Difference]: Finished difference Result 109 states and 115 transitions. [2020-10-13 05:27:35,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 05:27:35,303 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 66 [2020-10-13 05:27:35,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:27:35,306 INFO L225 Difference]: With dead ends: 109 [2020-10-13 05:27:35,309 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 05:27:35,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=392, Invalid=2470, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 05:27:35,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 05:27:35,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2020-10-13 05:27:35,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 05:27:35,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-13 05:27:35,328 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 66 [2020-10-13 05:27:35,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:27:35,329 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-13 05:27:35,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 05:27:35,329 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-13 05:27:35,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 05:27:35,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:27:35,331 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:27:35,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 05:27:35,331 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:27:35,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:27:35,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1302522207, now seen corresponding path program 14 times [2020-10-13 05:27:35,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:27:35,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581296802] [2020-10-13 05:27:35,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:27:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:35,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:35,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:35,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:35,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:35,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:36,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:36,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:36,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:36,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:37,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:37,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:37,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:37,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:39,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:39,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 05:27:39,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 05:27:39,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4550 [2020-10-13 05:27:39,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:39,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 05:27:39,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:27:39,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-13 05:27:39,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:40,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:27:40,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:40,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:40,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:40,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:27:40,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:40,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:27:40,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:40,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:27:40,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:40,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:27:40,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:40,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 05:27:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:40,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:40,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:40,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:27:40,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:40,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:27:40,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:40,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:27:40,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:40,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:27:40,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:41,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 05:27:41,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:41,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:41,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:41,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:27:41,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:41,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:27:41,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:41,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:27:41,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:41,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:27:41,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:41,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 05:27:41,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:41,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:41,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:41,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:27:41,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:41,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:27:41,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:41,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:27:41,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:41,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:27:41,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:41,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 05:27:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:41,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:41,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:41,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:27:41,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:41,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:27:41,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:41,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:27:41,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:41,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:27:41,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:41,133 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 13 proven. 102 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 05:27:41,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581296802] [2020-10-13 05:27:41,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:27:41,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 05:27:41,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912941658] [2020-10-13 05:27:41,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 05:27:41,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:27:41,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 05:27:41,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:27:41,136 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 27 states. [2020-10-13 05:27:42,477 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-13 05:27:42,733 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-13 05:27:44,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:27:44,980 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2020-10-13 05:27:44,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-13 05:27:44,981 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 70 [2020-10-13 05:27:44,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:27:44,982 INFO L225 Difference]: With dead ends: 115 [2020-10-13 05:27:44,982 INFO L226 Difference]: Without dead ends: 113 [2020-10-13 05:27:44,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=578, Invalid=3978, Unknown=0, NotChecked=0, Total=4556 [2020-10-13 05:27:44,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-13 05:27:44,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 97. [2020-10-13 05:27:44,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 05:27:44,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 105 transitions. [2020-10-13 05:27:44,997 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 105 transitions. Word has length 70 [2020-10-13 05:27:44,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:27:44,998 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 105 transitions. [2020-10-13 05:27:44,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 05:27:44,998 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 105 transitions. [2020-10-13 05:27:44,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 05:27:44,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:27:44,999 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:27:44,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 05:27:44,999 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:27:44,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:27:44,999 INFO L82 PathProgramCache]: Analyzing trace with hash -485875044, now seen corresponding path program 15 times [2020-10-13 05:27:45,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:27:45,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801281672] [2020-10-13 05:27:45,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:27:45,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:45,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:45,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:45,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:45,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:45,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:45,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:46,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:46,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:47,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:47,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:47,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:47,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:48,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:48,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:49,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:49,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 05:27:49,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 05:27:49,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4754 [2020-10-13 05:27:49,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:49,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 05:27:49,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:27:49,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 05:27:49,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:50,683 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 29 [2020-10-13 05:27:51,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:27:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:51,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:51,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:51,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:27:51,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:51,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:27:51,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:51,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:27:51,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:51,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:27:51,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:27:51,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 05:27:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:51,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:51,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:51,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:27:51,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:51,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 05:27:51,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:51,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:27:51,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:51,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:27:51,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:27:51,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 05:27:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:51,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:51,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:51,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:27:51,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:51,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 05:27:51,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:51,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:27:51,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:51,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:27:51,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:27:51,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 05:27:51,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:51,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:51,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:51,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:27:51,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:51,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:27:51,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:51,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:27:51,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:51,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:27:51,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:27:51,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-13 05:27:51,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:51,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:51,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:51,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:27:51,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:51,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:27:51,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:51,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:27:51,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:51,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:27:51,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:27:51,848 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 128 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-13 05:27:51,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801281672] [2020-10-13 05:27:51,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:27:51,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 05:27:51,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289600088] [2020-10-13 05:27:51,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 05:27:51,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:27:51,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 05:27:51,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:27:51,852 INFO L87 Difference]: Start difference. First operand 97 states and 105 transitions. Second operand 26 states. [2020-10-13 05:27:52,648 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-13 05:27:52,924 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-13 05:27:53,114 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-10-13 05:27:53,344 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2020-10-13 05:27:53,490 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-13 05:27:53,813 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-13 05:27:54,102 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-13 05:27:54,298 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-10-13 05:27:54,457 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-13 05:27:55,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:27:55,739 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2020-10-13 05:27:55,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 05:27:55,740 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 74 [2020-10-13 05:27:55,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:27:55,742 INFO L225 Difference]: With dead ends: 109 [2020-10-13 05:27:55,742 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 05:27:55,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 12 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=499, Invalid=2923, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 05:27:55,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 05:27:55,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-10-13 05:27:55,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 05:27:55,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2020-10-13 05:27:55,755 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 74 [2020-10-13 05:27:55,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:27:55,756 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2020-10-13 05:27:55,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 05:27:55,756 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2020-10-13 05:27:55,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 05:27:55,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:27:55,757 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:27:55,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 05:27:55,757 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:27:55,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:27:55,757 INFO L82 PathProgramCache]: Analyzing trace with hash 863464024, now seen corresponding path program 16 times [2020-10-13 05:27:55,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:27:55,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311002675] [2020-10-13 05:27:55,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:27:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:55,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:55,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:55,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:56,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:56,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:56,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:56,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:57,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:57,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:57,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:57,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:58,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:58,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:00,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:00,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:00,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:00,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:00,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:00,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 05:28:00,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 05:28:00,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5102 [2020-10-13 05:28:00,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:00,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 05:28:00,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:28:00,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-13 05:28:00,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:02,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:28:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:02,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:02,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:02,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:28:02,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:02,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:28:02,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:02,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:02,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:02,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:02,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:28:02,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 05:28:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:02,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:02,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:02,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:02,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:02,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:28:02,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:02,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:28:02,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:02,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:28:02,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:28:02,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 05:28:02,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:02,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:02,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:02,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:02,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:02,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:28:02,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:02,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:28:02,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:02,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:28:02,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:28:02,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 05:28:02,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:02,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:02,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:02,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:02,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:02,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:28:02,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:02,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:28:02,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:02,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:28:02,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:02,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 05:28:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:02,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:02,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:02,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:02,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:02,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:28:02,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:02,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:28:02,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:02,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:28:02,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:02,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-13 05:28:02,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:02,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:02,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:02,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:02,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:02,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:28:02,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:02,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:28:02,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:02,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:28:02,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:02,355 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 29 proven. 109 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 05:28:02,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311002675] [2020-10-13 05:28:02,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:28:02,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 05:28:02,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871233044] [2020-10-13 05:28:02,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 05:28:02,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:28:02,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 05:28:02,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:28:02,357 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 27 states. [2020-10-13 05:28:04,273 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-10-13 05:28:04,600 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-10-13 05:28:04,856 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-13 05:28:05,567 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-10-13 05:28:06,514 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-10-13 05:28:06,757 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-10-13 05:28:06,961 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-10-13 05:28:07,273 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-10-13 05:28:07,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:28:07,397 INFO L93 Difference]: Finished difference Result 119 states and 130 transitions. [2020-10-13 05:28:07,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 05:28:07,398 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 78 [2020-10-13 05:28:07,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:28:07,400 INFO L225 Difference]: With dead ends: 119 [2020-10-13 05:28:07,400 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 05:28:07,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=506, Invalid=3276, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 05:28:07,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 05:28:07,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2020-10-13 05:28:07,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 05:28:07,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-10-13 05:28:07,414 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 78 [2020-10-13 05:28:07,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:28:07,414 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-10-13 05:28:07,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 05:28:07,414 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-10-13 05:28:07,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 05:28:07,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:28:07,415 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:28:07,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 05:28:07,415 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:28:07,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:28:07,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1224586413, now seen corresponding path program 17 times [2020-10-13 05:28:07,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:28:07,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552829603] [2020-10-13 05:28:07,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:28:07,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:07,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:07,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:07,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:08,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:09,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:09,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:10,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:10,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:10,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:11,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:11,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:11,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:11,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:12,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:12,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 05:28:12,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 05:28:12,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 05:28:12,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:12,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 05:28:12,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:28:12,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-13 05:28:12,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:14,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:28:14,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:14,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:14,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:14,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:28:14,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:14,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:28:14,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:14,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:14,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:14,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:14,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:14,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 05:28:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:14,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:14,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:14,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:14,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:14,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:28:14,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:14,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:28:14,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:14,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:28:14,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:14,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 05:28:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:14,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:14,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:14,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:14,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:14,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 05:28:14,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:14,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:28:14,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:14,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:28:14,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:14,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 05:28:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:14,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:14,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:14,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:14,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:14,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:28:14,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:14,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:28:14,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:14,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:28:14,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:14,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-13 05:28:14,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:14,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:14,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:14,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:14,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:14,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:28:14,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:14,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:28:14,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:14,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:28:14,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:14,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-13 05:28:14,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:14,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:14,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:14,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:14,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:14,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:28:14,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:14,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:28:14,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:14,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:28:14,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 12 proven. 151 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 05:28:14,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552829603] [2020-10-13 05:28:14,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:28:14,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 05:28:14,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328298997] [2020-10-13 05:28:14,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 05:28:14,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:28:14,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 05:28:14,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:28:14,435 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 28 states. [2020-10-13 05:28:15,538 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-10-13 05:28:15,760 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2020-10-13 05:28:15,940 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-10-13 05:28:16,231 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2020-10-13 05:28:18,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:28:18,470 INFO L93 Difference]: Finished difference Result 123 states and 133 transitions. [2020-10-13 05:28:18,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 05:28:18,470 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 82 [2020-10-13 05:28:18,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:28:18,472 INFO L225 Difference]: With dead ends: 123 [2020-10-13 05:28:18,472 INFO L226 Difference]: Without dead ends: 121 [2020-10-13 05:28:18,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 13 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=390, Invalid=3150, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 05:28:18,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-13 05:28:18,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 113. [2020-10-13 05:28:18,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-13 05:28:18,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2020-10-13 05:28:18,486 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 82 [2020-10-13 05:28:18,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:28:18,486 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2020-10-13 05:28:18,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 05:28:18,487 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2020-10-13 05:28:18,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 05:28:18,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:28:18,488 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:28:18,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 05:28:18,488 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:28:18,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:28:18,488 INFO L82 PathProgramCache]: Analyzing trace with hash -940689714, now seen corresponding path program 18 times [2020-10-13 05:28:18,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:28:18,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645260525] [2020-10-13 05:28:18,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:28:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:18,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:18,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:19,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:19,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:19,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:19,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:20,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:20,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:22,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:22,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:23,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:23,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:23,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:23,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 05:28:23,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 05:28:23,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 05:28:23,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:23,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 05:28:23,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:28:23,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-13 05:28:23,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:24,044 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-10-13 05:28:24,238 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-10-13 05:28:24,501 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2020-10-13 05:28:24,734 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2020-10-13 05:28:24,899 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 29 [2020-10-13 05:28:25,099 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 34 [2020-10-13 05:28:25,353 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 34 [2020-10-13 05:28:25,579 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-10-13 05:28:27,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:28:27,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:27,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:27,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:27,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:28:27,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:27,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:28:27,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:27,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:27,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:27,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:27,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:27,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 05:28:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:27,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:27,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:27,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:27,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:27,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:28:27,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:27,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:28:27,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:27,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:28:27,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:27,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 05:28:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:27,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:27,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:27,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:27,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:27,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:28:27,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:27,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:28:27,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:27,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:28:27,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:27,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 05:28:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:27,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:27,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:27,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:27,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:27,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:28:27,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:27,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:28:27,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:27,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:28:27,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:27,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-13 05:28:27,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:27,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:27,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:27,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:27,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:27,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:28:27,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:27,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:28:27,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:27,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:28:27,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:27,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-13 05:28:27,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:27,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:27,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:27,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:27,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:27,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:28:27,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:27,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:28:27,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:27,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:28:27,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:27,428 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 14 proven. 184 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 05:28:27,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645260525] [2020-10-13 05:28:27,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:28:27,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 05:28:27,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868851449] [2020-10-13 05:28:27,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 05:28:27,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:28:27,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 05:28:27,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:28:27,430 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand 36 states. [2020-10-13 05:28:27,904 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-10-13 05:28:28,078 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-13 05:28:28,266 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-10-13 05:28:28,539 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 59 [2020-10-13 05:28:28,804 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 49 [2020-10-13 05:28:29,035 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-10-13 05:28:29,277 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-10-13 05:28:29,508 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-10-13 05:28:29,861 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2020-10-13 05:28:30,141 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-13 05:28:30,763 WARN L193 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 95 [2020-10-13 05:28:31,075 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2020-10-13 05:28:31,410 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2020-10-13 05:28:31,700 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2020-10-13 05:28:32,092 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2020-10-13 05:28:32,395 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2020-10-13 05:28:32,696 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-13 05:28:33,043 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2020-10-13 05:28:33,687 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-10-13 05:28:34,181 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-13 05:28:34,446 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-13 05:28:35,130 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-10-13 05:28:35,541 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-10-13 05:28:35,881 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-13 05:28:36,428 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-10-13 05:28:36,854 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-10-13 05:28:37,341 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-13 05:28:38,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:28:38,132 INFO L93 Difference]: Finished difference Result 157 states and 173 transitions. [2020-10-13 05:28:38,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-13 05:28:38,132 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 86 [2020-10-13 05:28:38,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:28:38,134 INFO L225 Difference]: With dead ends: 157 [2020-10-13 05:28:38,134 INFO L226 Difference]: Without dead ends: 155 [2020-10-13 05:28:38,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1345 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=795, Invalid=5057, Unknown=0, NotChecked=0, Total=5852 [2020-10-13 05:28:38,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-13 05:28:38,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 117. [2020-10-13 05:28:38,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-13 05:28:38,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 127 transitions. [2020-10-13 05:28:38,152 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 127 transitions. Word has length 86 [2020-10-13 05:28:38,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:28:38,153 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 127 transitions. [2020-10-13 05:28:38,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 05:28:38,153 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 127 transitions. [2020-10-13 05:28:38,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 05:28:38,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:28:38,158 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:28:38,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 05:28:38,158 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:28:38,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:28:38,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1052914422, now seen corresponding path program 19 times [2020-10-13 05:28:38,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:28:38,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329942922] [2020-10-13 05:28:38,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:28:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:38,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:38,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:38,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:38,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:38,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:39,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:39,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:39,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:39,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:40,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:40,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:40,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:41,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:41,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:41,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:43,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:43,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 05:28:43,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 05:28:43,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:28:43,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:43,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 05:28:43,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:28:43,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-13 05:28:43,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:45,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:28:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:45,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:45,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:45,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:28:45,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:45,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:28:45,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:45,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:45,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:45,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:45,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:45,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 05:28:45,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:45,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:45,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:45,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:45,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:45,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:28:45,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:45,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:28:45,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:45,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:28:45,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:45,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 05:28:45,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:45,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:45,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:45,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:45,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:45,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:28:45,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:45,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:28:45,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:45,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:28:45,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:45,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 05:28:45,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:45,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:45,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:45,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:45,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:45,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:28:45,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:45,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:28:45,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:45,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:28:45,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:45,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-13 05:28:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:45,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:45,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:45,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:45,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:45,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:28:45,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:45,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:28:45,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:45,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:28:45,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:45,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-13 05:28:45,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:45,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:45,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:45,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:45,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:45,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:28:45,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:45,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:28:45,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:45,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:28:45,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:45,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-13 05:28:45,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:45,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:45,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:45,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:45,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:45,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:28:45,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:45,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:28:45,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:45,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:28:45,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:45,567 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 60 proven. 139 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 05:28:45,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329942922] [2020-10-13 05:28:45,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:28:45,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 05:28:45,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507528618] [2020-10-13 05:28:45,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 05:28:45,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:28:45,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 05:28:45,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:28:45,569 INFO L87 Difference]: Start difference. First operand 117 states and 127 transitions. Second operand 32 states. [2020-10-13 05:28:45,763 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2020-10-13 05:28:46,418 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-13 05:28:47,243 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-13 05:28:47,450 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-13 05:28:47,750 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-13 05:28:47,964 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-13 05:28:48,270 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-13 05:28:48,692 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-10-13 05:28:48,953 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-10-13 05:28:49,910 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-13 05:28:50,782 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-13 05:28:51,343 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-13 05:28:52,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:28:52,432 INFO L93 Difference]: Finished difference Result 153 states and 170 transitions. [2020-10-13 05:28:52,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-13 05:28:52,433 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 90 [2020-10-13 05:28:52,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:28:52,435 INFO L225 Difference]: With dead ends: 153 [2020-10-13 05:28:52,435 INFO L226 Difference]: Without dead ends: 117 [2020-10-13 05:28:52,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=766, Invalid=5086, Unknown=0, NotChecked=0, Total=5852 [2020-10-13 05:28:52,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-13 05:28:52,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-10-13 05:28:52,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-13 05:28:52,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 126 transitions. [2020-10-13 05:28:52,454 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 126 transitions. Word has length 90 [2020-10-13 05:28:52,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:28:52,454 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 126 transitions. [2020-10-13 05:28:52,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 05:28:52,454 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 126 transitions. [2020-10-13 05:28:52,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 05:28:52,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:28:52,455 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:28:52,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 05:28:52,455 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:28:52,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:28:52,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1639050441, now seen corresponding path program 20 times [2020-10-13 05:28:52,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:28:52,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489235066] [2020-10-13 05:28:52,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:28:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:52,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:52,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:52,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:53,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:53,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:53,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:55,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:57,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:57,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 05:28:57,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:28:57,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:28:57,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:57,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 05:28:57,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:28:57,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-13 05:28:57,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:58,286 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2020-10-13 05:28:58,511 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2020-10-13 05:28:58,710 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-10-13 05:28:58,984 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2020-10-13 05:28:59,269 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2020-10-13 05:28:59,514 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 36 [2020-10-13 05:28:59,768 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 36 [2020-10-13 05:28:59,985 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 38 [2020-10-13 05:29:00,197 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44 [2020-10-13 05:29:00,477 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 38 [2020-10-13 05:29:00,775 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 42 [2020-10-13 05:29:01,052 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 41 [2020-10-13 05:29:01,332 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 39 [2020-10-13 05:29:01,656 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 41 [2020-10-13 05:29:01,917 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 26 [2020-10-13 05:29:02,100 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 26 [2020-10-13 05:29:02,315 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 25 [2020-10-13 05:29:02,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:29:02,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:02,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:02,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:02,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:29:02,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:02,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:29:02,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:02,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:29:02,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:02,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:29:02,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:02,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 05:29:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:02,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:02,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:02,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:02,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:02,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:29:02,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:02,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:29:02,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:02,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:29:02,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:02,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 05:29:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:02,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:02,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:02,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:02,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:02,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:29:02,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:02,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:29:02,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:02,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:29:02,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:02,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-13 05:29:02,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:02,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:02,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:02,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:02,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:02,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 05:29:02,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:02,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:29:02,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:02,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:29:02,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:02,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-13 05:29:02,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:02,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:03,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:03,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:03,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:03,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 05:29:03,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:03,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:29:03,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:03,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:29:03,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:03,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-13 05:29:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:03,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:03,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:03,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:03,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:03,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:29:03,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:03,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:29:03,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:03,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:29:03,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 20 proven. 211 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 05:29:03,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489235066] [2020-10-13 05:29:03,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:29:03,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 05:29:03,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637589836] [2020-10-13 05:29:03,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 05:29:03,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:29:03,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 05:29:03,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:29:03,088 INFO L87 Difference]: Start difference. First operand 117 states and 126 transitions. Second operand 34 states. [2020-10-13 05:29:03,458 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 44 [2020-10-13 05:29:03,688 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 48 [2020-10-13 05:29:03,864 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-10-13 05:29:04,304 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2020-10-13 05:29:04,744 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 60 [2020-10-13 05:29:05,063 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 55 [2020-10-13 05:29:05,237 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-10-13 05:29:06,092 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-10-13 05:29:06,562 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2020-10-13 05:29:07,030 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2020-10-13 05:29:07,615 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 80 [2020-10-13 05:29:08,347 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2020-10-13 05:29:08,740 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2020-10-13 05:29:09,077 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2020-10-13 05:29:09,518 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2020-10-13 05:29:10,007 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-10-13 05:29:11,776 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-10-13 05:29:12,169 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-13 05:29:12,535 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-13 05:29:12,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:29:12,710 INFO L93 Difference]: Finished difference Result 159 states and 176 transitions. [2020-10-13 05:29:12,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-13 05:29:12,710 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 90 [2020-10-13 05:29:12,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:29:12,715 INFO L225 Difference]: With dead ends: 159 [2020-10-13 05:29:12,715 INFO L226 Difference]: Without dead ends: 157 [2020-10-13 05:29:12,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 15 SyntacticMatches, 6 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=745, Invalid=4955, Unknown=0, NotChecked=0, Total=5700 [2020-10-13 05:29:12,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-13 05:29:12,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 143. [2020-10-13 05:29:12,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-13 05:29:12,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 158 transitions. [2020-10-13 05:29:12,751 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 158 transitions. Word has length 90 [2020-10-13 05:29:12,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:29:12,751 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 158 transitions. [2020-10-13 05:29:12,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 05:29:12,752 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 158 transitions. [2020-10-13 05:29:12,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 05:29:12,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:29:12,753 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:29:12,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 05:29:12,754 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:29:12,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:29:12,754 INFO L82 PathProgramCache]: Analyzing trace with hash -974123643, now seen corresponding path program 21 times [2020-10-13 05:29:12,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:29:12,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368639924] [2020-10-13 05:29:12,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:29:12,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:12,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:12,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:13,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:13,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:14,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:14,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:14,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:14,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:14,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:15,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:15,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:16,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:17,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:17,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:17,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:17,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:17,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 05:29:17,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 05:29:17,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:29:17,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:17,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 05:29:17,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:29:17,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-13 05:29:17,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:19,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:29:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:19,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:19,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:19,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:29:19,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:19,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:29:19,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:19,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:29:19,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:19,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:29:19,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:19,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 05:29:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:19,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:19,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:19,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:19,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:19,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:29:19,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:19,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:29:19,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:19,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:29:19,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:19,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 05:29:19,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:19,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:19,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:19,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:19,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:19,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:29:19,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:19,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:29:19,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:19,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:29:19,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:19,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 05:29:19,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:19,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:19,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:19,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:19,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:19,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:29:19,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:19,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:29:19,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:19,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:29:19,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:19,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-13 05:29:19,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:19,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:19,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:19,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:19,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:19,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:29:19,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:19,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:29:19,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:19,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:29:19,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:19,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-13 05:29:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:19,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:19,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:19,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:19,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:19,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:29:19,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:19,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:29:19,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:19,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:29:19,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:19,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-13 05:29:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:19,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:19,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:19,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:19,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:19,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:29:19,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:19,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:29:19,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:19,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:29:19,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 14 proven. 205 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-13 05:29:19,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368639924] [2020-10-13 05:29:19,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:29:19,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 05:29:19,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056002481] [2020-10-13 05:29:19,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 05:29:19,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:29:19,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 05:29:19,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:29:19,978 INFO L87 Difference]: Start difference. First operand 143 states and 158 transitions. Second operand 31 states. [2020-10-13 05:29:21,872 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-13 05:29:22,220 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-13 05:29:26,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:29:26,474 INFO L93 Difference]: Finished difference Result 159 states and 176 transitions. [2020-10-13 05:29:26,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-13 05:29:26,482 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 94 [2020-10-13 05:29:26,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:29:26,485 INFO L225 Difference]: With dead ends: 159 [2020-10-13 05:29:26,485 INFO L226 Difference]: Without dead ends: 157 [2020-10-13 05:29:26,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1448 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=652, Invalid=5048, Unknown=0, NotChecked=0, Total=5700 [2020-10-13 05:29:26,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-13 05:29:26,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 143. [2020-10-13 05:29:26,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-13 05:29:26,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 158 transitions. [2020-10-13 05:29:26,531 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 158 transitions. Word has length 94 [2020-10-13 05:29:26,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:29:26,531 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 158 transitions. [2020-10-13 05:29:26,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 05:29:26,531 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 158 transitions. [2020-10-13 05:29:26,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 05:29:26,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:29:26,533 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:29:26,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 05:29:26,533 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:29:26,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:29:26,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1717841220, now seen corresponding path program 22 times [2020-10-13 05:29:26,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:29:26,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663996656] [2020-10-13 05:29:26,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:29:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:26,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:26,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:27,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:27,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:27,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:29,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:29,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:29,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:30,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:30,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:30,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:31,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:31,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:31,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 05:29:31,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 05:29:31,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:29:31,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:31,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-13 05:29:31,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:29:31,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-13 05:29:31,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:32,064 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2020-10-13 05:29:32,318 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 28 [2020-10-13 05:29:32,519 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 29 [2020-10-13 05:29:32,735 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 29 [2020-10-13 05:29:33,022 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 30 [2020-10-13 05:29:33,274 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2020-10-13 05:29:33,520 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2020-10-13 05:29:33,740 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2020-10-13 05:29:34,036 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-10-13 05:29:34,253 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2020-10-13 05:29:34,494 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-13 05:29:34,683 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2020-10-13 05:29:34,985 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 27 [2020-10-13 05:29:35,165 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 30 [2020-10-13 05:29:35,469 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 33 [2020-10-13 05:29:36,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:29:36,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:36,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:36,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:36,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:29:36,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:36,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:29:36,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:36,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:29:36,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:36,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:29:36,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:36,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 05:29:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:36,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:36,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:36,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:36,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:36,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:29:36,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:36,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:29:36,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:36,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:29:36,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:36,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 05:29:36,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:36,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:36,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:36,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:36,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:36,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:29:36,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:36,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:29:36,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:36,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:29:36,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:36,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-13 05:29:36,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:36,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:36,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:36,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:36,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:36,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:29:36,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:36,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:29:36,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:36,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:29:36,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:36,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-13 05:29:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:36,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:36,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:36,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:36,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:36,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:29:36,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:36,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:29:36,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:36,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:29:36,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:36,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-13 05:29:36,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:36,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:36,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:36,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:36,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:36,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:29:36,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:36,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:29:36,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:36,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:29:36,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:36,981 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 15 proven. 250 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 05:29:36,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663996656] [2020-10-13 05:29:36,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:29:36,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 05:29:36,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770957545] [2020-10-13 05:29:36,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 05:29:36,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:29:36,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 05:29:36,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:29:36,983 INFO L87 Difference]: Start difference. First operand 143 states and 158 transitions. Second operand 36 states. [2020-10-13 05:29:37,563 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-13 05:29:38,096 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2020-10-13 05:29:38,465 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2020-10-13 05:29:38,696 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-13 05:29:38,932 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-10-13 05:29:39,150 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2020-10-13 05:29:39,437 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-13 05:29:39,704 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-10-13 05:29:39,976 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-10-13 05:29:40,155 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-10-13 05:29:40,620 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 75 [2020-10-13 05:29:41,030 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 81 [2020-10-13 05:29:41,384 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 73 [2020-10-13 05:29:41,768 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 79 [2020-10-13 05:29:42,112 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-10-13 05:29:42,781 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-13 05:29:43,210 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-13 05:29:43,510 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-10-13 05:29:43,797 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-10-13 05:29:44,208 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-13 05:29:44,859 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-13 05:29:45,133 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-10-13 05:29:45,567 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-13 05:29:45,961 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-13 05:29:46,237 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-10-13 05:29:46,525 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-10-13 05:29:47,185 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-13 05:29:47,683 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-13 05:29:48,044 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-13 05:29:48,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:29:48,149 INFO L93 Difference]: Finished difference Result 165 states and 182 transitions. [2020-10-13 05:29:48,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-13 05:29:48,150 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 94 [2020-10-13 05:29:48,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:29:48,152 INFO L225 Difference]: With dead ends: 165 [2020-10-13 05:29:48,152 INFO L226 Difference]: Without dead ends: 163 [2020-10-13 05:29:48,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 13 SyntacticMatches, 11 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1439 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=822, Invalid=5030, Unknown=0, NotChecked=0, Total=5852 [2020-10-13 05:29:48,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-13 05:29:48,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 129. [2020-10-13 05:29:48,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-13 05:29:48,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2020-10-13 05:29:48,201 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 94 [2020-10-13 05:29:48,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:29:48,202 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2020-10-13 05:29:48,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 05:29:48,202 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2020-10-13 05:29:48,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 05:29:48,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:29:48,207 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:29:48,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 05:29:48,208 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:29:48,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:29:48,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1371039616, now seen corresponding path program 23 times [2020-10-13 05:29:48,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:29:48,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846394630] [2020-10-13 05:29:48,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:29:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:48,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:48,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:48,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:48,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:49,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:50,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:53,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:53,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 05:29:53,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:29:53,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 05:29:53,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:53,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-13 05:29:53,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:29:53,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-13 05:29:53,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:53,726 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2020-10-13 05:29:53,952 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2020-10-13 05:29:54,206 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 33 [2020-10-13 05:29:54,462 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 35 [2020-10-13 05:29:54,854 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 35 [2020-10-13 05:29:55,263 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 35 [2020-10-13 05:29:55,573 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2020-10-13 05:29:55,927 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 39 [2020-10-13 05:29:56,273 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2020-10-13 05:29:56,606 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 36 [2020-10-13 05:29:56,908 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 32 [2020-10-13 05:29:57,210 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 32 [2020-10-13 05:29:57,483 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 32 [2020-10-13 05:29:57,800 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 35 [2020-10-13 05:29:58,108 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 34 [2020-10-13 05:29:58,479 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 39 [2020-10-13 05:29:58,816 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 33 [2020-10-13 05:29:59,153 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 31 [2020-10-13 05:29:59,521 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 30 [2020-10-13 05:29:59,836 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 27 [2020-10-13 05:30:00,128 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 27 [2020-10-13 05:30:00,432 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 26 [2020-10-13 05:30:00,703 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 20 [2020-10-13 05:30:00,983 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 20 [2020-10-13 05:30:01,264 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 20 [2020-10-13 05:30:01,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:30:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:01,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:01,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:01,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:30:01,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:01,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:30:01,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:01,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:30:01,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:01,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:30:01,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:01,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 05:30:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:01,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:01,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:01,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:30:01,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:01,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:30:01,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:01,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:30:01,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:01,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:30:01,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:01,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 05:30:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:01,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:01,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:01,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:30:01,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:01,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 05:30:01,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:01,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:30:01,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:01,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:30:01,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:01,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-13 05:30:01,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:01,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:02,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:02,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:30:02,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:02,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:30:02,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:02,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:30:02,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:02,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:30:02,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:02,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-13 05:30:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:02,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:02,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:02,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:30:02,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:02,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:30:02,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:02,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:30:02,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:02,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:30:02,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:02,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-13 05:30:02,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:02,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:02,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:02,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:30:02,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:02,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:30:02,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:02,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:30:02,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:02,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:30:02,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:02,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-13 05:30:02,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:02,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:02,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:02,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:30:02,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:02,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:30:02,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:02,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:30:02,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:02,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:30:02,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:02,227 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 19 proven. 247 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-13 05:30:02,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846394630] [2020-10-13 05:30:02,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:30:02,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 05:30:02,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906754151] [2020-10-13 05:30:02,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 05:30:02,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:30:02,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 05:30:02,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1274, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 05:30:02,229 INFO L87 Difference]: Start difference. First operand 129 states and 139 transitions. Second operand 39 states. [2020-10-13 05:30:02,958 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2020-10-13 05:30:03,838 WARN L193 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 79 [2020-10-13 05:30:04,712 WARN L193 SmtUtils]: Spent 757.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 76 [2020-10-13 05:30:05,079 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-10-13 05:30:05,884 WARN L193 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 80 [2020-10-13 05:30:06,676 WARN L193 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 75 [2020-10-13 05:30:07,024 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-13 05:30:07,587 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-10-13 05:30:08,024 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-10-13 05:30:08,437 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-10-13 05:30:08,841 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2020-10-13 05:30:09,747 WARN L193 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 82 [2020-10-13 05:30:10,631 WARN L193 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 85 [2020-10-13 05:30:11,377 WARN L193 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 77 [2020-10-13 05:30:12,455 WARN L193 SmtUtils]: Spent 960.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 96 [2020-10-13 05:30:13,191 WARN L193 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 80 [2020-10-13 05:30:13,868 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-10-13 05:30:14,209 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-13 05:30:15,129 WARN L193 SmtUtils]: Spent 779.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 90 [2020-10-13 05:30:15,945 WARN L193 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 76 [2020-10-13 05:30:16,916 WARN L193 SmtUtils]: Spent 784.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 84 [2020-10-13 05:30:17,756 WARN L193 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 77 [2020-10-13 05:30:18,551 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2020-10-13 05:30:19,370 WARN L193 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-10-13 05:30:19,991 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2020-10-13 05:30:20,623 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2020-10-13 05:30:21,097 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-10-13 05:30:21,809 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2020-10-13 05:30:22,611 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2020-10-13 05:30:23,243 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-10-13 05:30:23,739 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-10-13 05:30:24,326 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-13 05:30:24,822 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-13 05:30:25,218 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-13 05:30:25,649 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-10-13 05:30:26,196 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-13 05:30:26,661 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2020-10-13 05:30:27,050 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-10-13 05:30:27,478 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-10-13 05:30:27,884 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-13 05:30:28,394 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-10-13 05:30:28,841 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-10-13 05:30:29,255 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-13 05:30:29,685 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59