/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-examples/standard_copy9_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:46:51,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:46:51,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:46:51,818 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:46:51,819 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:46:51,827 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:46:51,829 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:46:51,833 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:46:51,835 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:46:51,838 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:46:51,839 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:46:51,840 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:46:51,841 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:46:51,843 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:46:51,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:46:51,847 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:46:51,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:46:51,849 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:46:51,851 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:46:51,858 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:46:51,860 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:46:51,861 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:46:51,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:46:51,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:46:51,877 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:46:51,877 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:46:51,878 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:46:51,878 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:46:51,879 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:46:51,880 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:46:51,880 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:46:51,886 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:46:51,886 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:46:51,887 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:46:51,888 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:46:51,888 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:46:51,889 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:46:51,889 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:46:51,889 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:46:51,890 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:46:51,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:46:51,894 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 04:46:51,931 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:46:51,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:46:51,932 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:46:51,933 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:46:51,933 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:46:51,933 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:46:51,934 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:46:51,934 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:46:51,934 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:46:51,934 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:46:51,935 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:46:51,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:46:51,936 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:46:51,936 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:46:51,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:46:51,936 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:46:51,936 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:46:51,937 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:46:51,937 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:46:51,937 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:46:51,937 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:46:51,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:46:51,938 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:46:51,938 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:46:51,938 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:46:51,938 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:46:51,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:46:51,939 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:46:51,939 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:46:51,939 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 04:46:52,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:46:52,244 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:46:52,247 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:46:52,249 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:46:52,249 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:46:52,250 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy9_ground-1.i [2020-10-13 04:46:52,309 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/74acf86ff/20a41ce1792f4497b65220518eb41f40/FLAGd6dde991e [2020-10-13 04:46:52,747 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:46:52,748 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy9_ground-1.i [2020-10-13 04:46:52,756 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/74acf86ff/20a41ce1792f4497b65220518eb41f40/FLAGd6dde991e [2020-10-13 04:46:53,138 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/74acf86ff/20a41ce1792f4497b65220518eb41f40 [2020-10-13 04:46:53,146 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:46:53,147 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:46:53,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:46:53,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:46:53,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:46:53,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:46:53" (1/1) ... [2020-10-13 04:46:53,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@743cee4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:53, skipping insertion in model container [2020-10-13 04:46:53,156 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:46:53" (1/1) ... [2020-10-13 04:46:53,165 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:46:53,183 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:46:53,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:46:53,365 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:46:53,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:46:53,496 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:46:53,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:53 WrapperNode [2020-10-13 04:46:53,497 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:46:53,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:46:53,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:46:53,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:46:53,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:53" (1/1) ... [2020-10-13 04:46:53,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:53" (1/1) ... [2020-10-13 04:46:53,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:53" (1/1) ... [2020-10-13 04:46:53,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:53" (1/1) ... [2020-10-13 04:46:53,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:53" (1/1) ... [2020-10-13 04:46:53,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:53" (1/1) ... [2020-10-13 04:46:53,539 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:53" (1/1) ... [2020-10-13 04:46:53,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:46:53,543 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:46:53,543 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:46:53,543 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:46:53,544 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:53" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:46:53,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:46:53,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:46:53,610 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:46:53,610 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:46:53,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:46:53,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:46:53,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 04:46:53,612 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:46:53,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:46:53,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:46:53,612 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:46:53,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:46:53,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:46:53,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:46:54,023 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:46:54,023 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-13 04:46:54,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:46:54 BoogieIcfgContainer [2020-10-13 04:46:54,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:46:54,029 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:46:54,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:46:54,032 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:46:54,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:46:53" (1/3) ... [2020-10-13 04:46:54,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@359cceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:46:54, skipping insertion in model container [2020-10-13 04:46:54,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:53" (2/3) ... [2020-10-13 04:46:54,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@359cceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:46:54, skipping insertion in model container [2020-10-13 04:46:54,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:46:54" (3/3) ... [2020-10-13 04:46:54,035 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy9_ground-1.i [2020-10-13 04:46:54,046 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:46:54,052 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:46:54,072 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:46:54,097 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:46:54,097 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:46:54,097 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:46:54,097 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:46:54,098 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:46:54,098 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:46:54,098 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:46:54,098 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:46:54,119 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-10-13 04:46:54,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 04:46:54,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:54,127 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:54,127 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:54,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:54,133 INFO L82 PathProgramCache]: Analyzing trace with hash -178932642, now seen corresponding path program 1 times [2020-10-13 04:46:54,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:54,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238332811] [2020-10-13 04:46:54,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:54,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:54,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:54,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:54,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:54,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:54,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:54,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:54,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:54,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:55,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:55,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:57,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:57,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 04:46:57,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 04:46:57,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3389 [2020-10-13 04:46:57,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:57,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:57,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 04:46:57,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:57,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:46:57,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:57,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:57,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:57,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:57,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:57,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 04:46:57,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:57,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:57,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:57,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:57,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:46:57,775 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 04:46:57,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238332811] [2020-10-13 04:46:57,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:46:57,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:46:57,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110062089] [2020-10-13 04:46:57,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:46:57,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:57,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:46:57,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:46:57,810 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 3 states. [2020-10-13 04:46:58,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:58,024 INFO L93 Difference]: Finished difference Result 94 states and 137 transitions. [2020-10-13 04:46:58,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:46:58,027 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-10-13 04:46:58,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:58,044 INFO L225 Difference]: With dead ends: 94 [2020-10-13 04:46:58,045 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 04:46:58,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:46:58,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 04:46:58,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-13 04:46:58,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 04:46:58,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2020-10-13 04:46:58,103 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 31 [2020-10-13 04:46:58,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:58,104 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2020-10-13 04:46:58,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:46:58,104 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2020-10-13 04:46:58,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 04:46:58,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:58,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:58,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:46:58,108 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:58,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:58,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1311438022, now seen corresponding path program 1 times [2020-10-13 04:46:58,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:58,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117261024] [2020-10-13 04:46:58,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:58,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:58,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:58,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:58,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:58,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:58,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:58,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:58,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:58,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:58,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:59,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:03,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:03,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 04:47:03,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 04:47:03,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 04:47:03,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:03,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:47:03,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 04:47:03,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:47:03,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 04:47:03,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:03,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:03,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:03,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:03,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:03,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:03,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:47:03,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:03,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:03,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:03,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:03,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:03,196 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 04:47:03,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117261024] [2020-10-13 04:47:03,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:47:03,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:47:03,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652846163] [2020-10-13 04:47:03,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:47:03,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:03,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:47:03,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:47:03,200 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 4 states. [2020-10-13 04:47:03,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:03,396 INFO L93 Difference]: Finished difference Result 99 states and 126 transitions. [2020-10-13 04:47:03,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:47:03,397 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-13 04:47:03,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:03,398 INFO L225 Difference]: With dead ends: 99 [2020-10-13 04:47:03,399 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 04:47:03,400 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 04:47:03,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 04:47:03,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2020-10-13 04:47:03,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 04:47:03,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2020-10-13 04:47:03,410 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 31 [2020-10-13 04:47:03,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:03,410 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2020-10-13 04:47:03,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:47:03,411 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2020-10-13 04:47:03,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 04:47:03,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:03,413 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:03,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:47:03,413 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:03,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:03,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1898370412, now seen corresponding path program 1 times [2020-10-13 04:47:03,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:03,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988149373] [2020-10-13 04:47:03,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:03,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:03,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:03,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:03,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:03,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:03,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:03,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:03,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:04,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:08,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:08,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 04:47:08,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 04:47:08,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:47:08,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:08,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:47:08,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:08,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:47:08,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:08,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:08,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:08,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:08,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:08,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:08,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:47:08,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:08,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:08,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:08,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:08,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 04:47:08,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988149373] [2020-10-13 04:47:08,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:47:08,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:47:08,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478812184] [2020-10-13 04:47:08,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:47:08,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:08,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:47:08,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:47:08,483 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 4 states. [2020-10-13 04:47:08,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:08,632 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2020-10-13 04:47:08,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:47:08,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-10-13 04:47:08,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:08,634 INFO L225 Difference]: With dead ends: 104 [2020-10-13 04:47:08,634 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 04:47:08,636 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 04:47:08,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 04:47:08,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-13 04:47:08,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 04:47:08,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2020-10-13 04:47:08,648 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 49 [2020-10-13 04:47:08,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:08,649 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2020-10-13 04:47:08,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:47:08,649 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2020-10-13 04:47:08,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 04:47:08,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:08,653 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:08,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:47:08,653 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:08,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:08,654 INFO L82 PathProgramCache]: Analyzing trace with hash -753251022, now seen corresponding path program 1 times [2020-10-13 04:47:08,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:08,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711314272] [2020-10-13 04:47:08,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:08,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:08,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:08,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:08,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:08,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:08,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:08,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:09,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:13,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:13,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 04:47:13,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 04:47:13,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:47:13,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:13,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:47:13,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 04:47:13,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:47:13,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:13,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:13,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:13,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:13,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:13,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:13,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:47:13,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:13,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:13,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:13,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:13,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:47:13,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 04:47:13,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711314272] [2020-10-13 04:47:13,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:13,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:47:13,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395909989] [2020-10-13 04:47:13,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:47:13,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:13,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:47:13,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:47:13,742 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 5 states. [2020-10-13 04:47:14,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:14,004 INFO L93 Difference]: Finished difference Result 126 states and 153 transitions. [2020-10-13 04:47:14,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:47:14,004 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-10-13 04:47:14,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:14,005 INFO L225 Difference]: With dead ends: 126 [2020-10-13 04:47:14,006 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 04:47:14,006 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 04:47:14,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 04:47:14,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2020-10-13 04:47:14,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 04:47:14,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2020-10-13 04:47:14,022 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 51 [2020-10-13 04:47:14,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:14,022 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2020-10-13 04:47:14,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:47:14,022 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2020-10-13 04:47:14,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 04:47:14,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:14,031 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:14,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:47:14,031 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:14,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:14,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1902395392, now seen corresponding path program 2 times [2020-10-13 04:47:14,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:14,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413812271] [2020-10-13 04:47:14,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:14,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:14,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:14,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:14,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:14,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:14,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:14,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:14,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:18,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:19,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:19,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 04:47:19,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 04:47:19,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 04:47:19,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:19,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:47:19,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:19,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:47:19,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:19,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:19,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:19,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:19,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:19,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:19,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:19,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:19,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:19,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:19,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:19,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 04:47:19,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413812271] [2020-10-13 04:47:19,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:19,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:47:19,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562696758] [2020-10-13 04:47:19,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:47:19,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:19,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:47:19,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:47:19,114 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand 5 states. [2020-10-13 04:47:19,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:19,233 INFO L93 Difference]: Finished difference Result 142 states and 162 transitions. [2020-10-13 04:47:19,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:47:19,234 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-13 04:47:19,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:19,235 INFO L225 Difference]: With dead ends: 142 [2020-10-13 04:47:19,235 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 04:47:19,237 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 04:47:19,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 04:47:19,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-13 04:47:19,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 04:47:19,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2020-10-13 04:47:19,250 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 69 [2020-10-13 04:47:19,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:19,251 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2020-10-13 04:47:19,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:47:19,251 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2020-10-13 04:47:19,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 04:47:19,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:19,254 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:19,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:47:19,256 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:19,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:19,257 INFO L82 PathProgramCache]: Analyzing trace with hash 573040542, now seen corresponding path program 3 times [2020-10-13 04:47:19,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:19,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507729861] [2020-10-13 04:47:19,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:19,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:19,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:19,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:19,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:19,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:19,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:19,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:23,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:24,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:24,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 04:47:24,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 04:47:24,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 04:47:24,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:24,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:47:24,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 04:47:24,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:47:24,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:24,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:24,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:24,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:24,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:24,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:24,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:24,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:24,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:24,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:24,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:24,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 04:47:24,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507729861] [2020-10-13 04:47:24,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:24,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:47:24,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596420298] [2020-10-13 04:47:24,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:47:24,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:24,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:47:24,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:47:24,372 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand 6 states. [2020-10-13 04:47:24,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:24,664 INFO L93 Difference]: Finished difference Result 162 states and 189 transitions. [2020-10-13 04:47:24,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:47:24,665 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-13 04:47:24,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:24,666 INFO L225 Difference]: With dead ends: 162 [2020-10-13 04:47:24,666 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 04:47:24,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:47:24,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 04:47:24,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2020-10-13 04:47:24,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 04:47:24,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2020-10-13 04:47:24,687 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 71 [2020-10-13 04:47:24,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:24,687 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2020-10-13 04:47:24,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:47:24,687 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2020-10-13 04:47:24,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 04:47:24,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:24,692 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:24,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:47:24,693 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:24,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:24,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1204742292, now seen corresponding path program 4 times [2020-10-13 04:47:24,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:24,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574062101] [2020-10-13 04:47:24,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:24,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:24,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:24,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:24,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:24,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:24,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:25,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:29,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:29,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 04:47:29,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:47:29,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:47:29,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:29,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:47:29,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:29,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:47:29,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:29,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:29,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:29,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:29,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:29,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:29,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:29,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:29,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:29,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:29,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:29,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:29,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:47:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 04:47:29,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574062101] [2020-10-13 04:47:29,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:29,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:47:29,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130593031] [2020-10-13 04:47:29,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:47:29,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:29,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:47:29,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:47:29,779 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand 6 states. [2020-10-13 04:47:29,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:29,901 INFO L93 Difference]: Finished difference Result 180 states and 200 transitions. [2020-10-13 04:47:29,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:47:29,901 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 89 [2020-10-13 04:47:29,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:29,902 INFO L225 Difference]: With dead ends: 180 [2020-10-13 04:47:29,903 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 04:47:29,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:47:29,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 04:47:29,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-13 04:47:29,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 04:47:29,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2020-10-13 04:47:29,917 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 89 [2020-10-13 04:47:29,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:29,918 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2020-10-13 04:47:29,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:47:29,918 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2020-10-13 04:47:29,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 04:47:29,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:29,924 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:29,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:47:29,925 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:29,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:29,926 INFO L82 PathProgramCache]: Analyzing trace with hash -134036470, now seen corresponding path program 5 times [2020-10-13 04:47:29,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:29,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678222814] [2020-10-13 04:47:29,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:29,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:29,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:29,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:29,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:30,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:30,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:30,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:30,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:34,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:34,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 04:47:34,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:47:34,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 04:47:34,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:34,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:47:34,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 04:47:34,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:47:34,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:34,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:34,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:34,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:34,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:34,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:34,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:34,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:34,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:34,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:34,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:34,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:34,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 04:47:35,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678222814] [2020-10-13 04:47:35,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:35,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:47:35,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117614724] [2020-10-13 04:47:35,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:47:35,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:35,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:47:35,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:47:35,007 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand 7 states. [2020-10-13 04:47:35,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:35,289 INFO L93 Difference]: Finished difference Result 198 states and 225 transitions. [2020-10-13 04:47:35,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:47:35,289 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 91 [2020-10-13 04:47:35,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:35,290 INFO L225 Difference]: With dead ends: 198 [2020-10-13 04:47:35,291 INFO L226 Difference]: Without dead ends: 123 [2020-10-13 04:47:35,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:47:35,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-13 04:47:35,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 114. [2020-10-13 04:47:35,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-13 04:47:35,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 124 transitions. [2020-10-13 04:47:35,305 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 124 transitions. Word has length 91 [2020-10-13 04:47:35,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:35,306 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 124 transitions. [2020-10-13 04:47:35,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:47:35,307 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 124 transitions. [2020-10-13 04:47:35,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 04:47:35,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:35,310 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:35,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:47:35,310 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:35,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:35,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1714335960, now seen corresponding path program 6 times [2020-10-13 04:47:35,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:35,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738213251] [2020-10-13 04:47:35,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:35,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:35,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:35,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:35,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:35,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:35,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:35,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:37,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:40,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:40,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 04:47:40,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:47:40,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-13 04:47:40,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:40,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:47:40,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:40,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:47:40,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:40,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:40,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:40,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:40,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:40,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:40,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:40,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:40,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:40,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:40,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:40,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:47:40,445 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-13 04:47:40,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738213251] [2020-10-13 04:47:40,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:40,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:47:40,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408076171] [2020-10-13 04:47:40,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:47:40,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:40,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:47:40,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:47:40,454 INFO L87 Difference]: Start difference. First operand 114 states and 124 transitions. Second operand 7 states. [2020-10-13 04:47:40,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:40,569 INFO L93 Difference]: Finished difference Result 218 states and 238 transitions. [2020-10-13 04:47:40,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:47:40,570 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 109 [2020-10-13 04:47:40,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:40,571 INFO L225 Difference]: With dead ends: 218 [2020-10-13 04:47:40,571 INFO L226 Difference]: Without dead ends: 117 [2020-10-13 04:47:40,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:47:40,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-13 04:47:40,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-10-13 04:47:40,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-13 04:47:40,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2020-10-13 04:47:40,588 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 109 [2020-10-13 04:47:40,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:40,591 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2020-10-13 04:47:40,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:47:40,592 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2020-10-13 04:47:40,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 04:47:40,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:40,593 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:40,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:47:40,594 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:40,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:40,594 INFO L82 PathProgramCache]: Analyzing trace with hash 517595766, now seen corresponding path program 7 times [2020-10-13 04:47:40,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:40,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391897884] [2020-10-13 04:47:40,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:40,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:40,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:40,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:40,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:40,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:40,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:42,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:45,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:45,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 04:47:45,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:47:45,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 04:47:45,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:45,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:47:45,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 04:47:45,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:47:45,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:45,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:45,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:45,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:45,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:45,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:45,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:45,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:45,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:45,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:45,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:45,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:45,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-13 04:47:45,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391897884] [2020-10-13 04:47:45,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:45,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:47:45,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911871974] [2020-10-13 04:47:45,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:47:45,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:45,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:47:45,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:47:45,697 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand 8 states. [2020-10-13 04:47:46,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:46,018 INFO L93 Difference]: Finished difference Result 234 states and 261 transitions. [2020-10-13 04:47:46,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:47:46,019 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-10-13 04:47:46,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:46,020 INFO L225 Difference]: With dead ends: 234 [2020-10-13 04:47:46,020 INFO L226 Difference]: Without dead ends: 143 [2020-10-13 04:47:46,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:47:46,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-13 04:47:46,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 134. [2020-10-13 04:47:46,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-13 04:47:46,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 144 transitions. [2020-10-13 04:47:46,027 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 144 transitions. Word has length 111 [2020-10-13 04:47:46,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:46,027 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 144 transitions. [2020-10-13 04:47:46,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:47:46,028 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 144 transitions. [2020-10-13 04:47:46,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-13 04:47:46,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:46,029 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:46,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:47:46,029 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:46,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:46,030 INFO L82 PathProgramCache]: Analyzing trace with hash 734792772, now seen corresponding path program 8 times [2020-10-13 04:47:46,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:46,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423220481] [2020-10-13 04:47:46,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:46,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:46,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:46,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:46,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:46,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:46,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:46,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:51,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:51,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-13 04:47:51,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:47:51,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:47:51,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:51,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:47:51,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:51,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:47:51,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:51,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:51,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:51,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:51,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:51,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:51,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:51,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:51,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:51,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:51,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:51,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-13 04:47:51,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423220481] [2020-10-13 04:47:51,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:51,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:47:51,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425229436] [2020-10-13 04:47:51,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:47:51,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:51,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:47:51,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:47:51,133 INFO L87 Difference]: Start difference. First operand 134 states and 144 transitions. Second operand 8 states. [2020-10-13 04:47:51,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:51,252 INFO L93 Difference]: Finished difference Result 256 states and 276 transitions. [2020-10-13 04:47:51,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:47:51,252 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 129 [2020-10-13 04:47:51,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:51,254 INFO L225 Difference]: With dead ends: 256 [2020-10-13 04:47:51,254 INFO L226 Difference]: Without dead ends: 137 [2020-10-13 04:47:51,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:47:51,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-13 04:47:51,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-10-13 04:47:51,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 04:47:51,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 146 transitions. [2020-10-13 04:47:51,260 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 146 transitions. Word has length 129 [2020-10-13 04:47:51,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:51,260 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 146 transitions. [2020-10-13 04:47:51,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:47:51,260 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 146 transitions. [2020-10-13 04:47:51,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 04:47:51,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:51,262 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:51,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:47:51,262 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:51,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:51,263 INFO L82 PathProgramCache]: Analyzing trace with hash -295943454, now seen corresponding path program 9 times [2020-10-13 04:47:51,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:51,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825018648] [2020-10-13 04:47:51,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:51,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:51,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:51,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:51,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:51,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:51,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:51,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:56,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:56,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 04:47:56,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:47:56,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 04:47:56,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:56,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:47:56,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 04:47:56,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:47:56,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:56,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:56,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:56,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:56,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:56,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:56,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:56,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:56,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:56,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:56,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:56,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:56,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:56,371 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-13 04:47:56,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825018648] [2020-10-13 04:47:56,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:56,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:47:56,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231011623] [2020-10-13 04:47:56,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:47:56,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:56,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:47:56,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:47:56,373 INFO L87 Difference]: Start difference. First operand 136 states and 146 transitions. Second operand 9 states. [2020-10-13 04:47:56,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:56,757 INFO L93 Difference]: Finished difference Result 270 states and 297 transitions. [2020-10-13 04:47:56,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:47:56,758 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-10-13 04:47:56,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:56,759 INFO L225 Difference]: With dead ends: 270 [2020-10-13 04:47:56,760 INFO L226 Difference]: Without dead ends: 163 [2020-10-13 04:47:56,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:47:56,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-13 04:47:56,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 154. [2020-10-13 04:47:56,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-13 04:47:56,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 164 transitions. [2020-10-13 04:47:56,768 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 164 transitions. Word has length 131 [2020-10-13 04:47:56,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:56,768 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 164 transitions. [2020-10-13 04:47:56,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:47:56,768 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 164 transitions. [2020-10-13 04:47:56,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-13 04:47:56,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:56,770 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:56,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:47:56,770 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:56,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:56,771 INFO L82 PathProgramCache]: Analyzing trace with hash -419944016, now seen corresponding path program 10 times [2020-10-13 04:47:56,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:56,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446983366] [2020-10-13 04:47:56,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:56,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:56,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:56,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:56,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:56,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:56,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:56,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:01,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:01,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-13 04:48:01,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:48:01,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-13 04:48:01,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:01,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:48:01,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:48:01,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:48:01,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:01,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:01,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:01,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:01,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:01,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:01,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:01,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:48:01,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:01,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:01,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:01,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:01,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:01,901 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-13 04:48:01,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446983366] [2020-10-13 04:48:01,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:01,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:48:01,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170127833] [2020-10-13 04:48:01,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:48:01,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:01,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:48:01,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:48:01,903 INFO L87 Difference]: Start difference. First operand 154 states and 164 transitions. Second operand 9 states. [2020-10-13 04:48:02,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:02,057 INFO L93 Difference]: Finished difference Result 294 states and 314 transitions. [2020-10-13 04:48:02,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:48:02,057 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 149 [2020-10-13 04:48:02,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:02,059 INFO L225 Difference]: With dead ends: 294 [2020-10-13 04:48:02,059 INFO L226 Difference]: Without dead ends: 157 [2020-10-13 04:48:02,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:48:02,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-13 04:48:02,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2020-10-13 04:48:02,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-13 04:48:02,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 166 transitions. [2020-10-13 04:48:02,073 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 166 transitions. Word has length 149 [2020-10-13 04:48:02,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:02,073 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 166 transitions. [2020-10-13 04:48:02,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:48:02,074 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 166 transitions. [2020-10-13 04:48:02,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-13 04:48:02,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:02,077 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:02,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:48:02,078 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:02,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:02,078 INFO L82 PathProgramCache]: Analyzing trace with hash -877075122, now seen corresponding path program 11 times [2020-10-13 04:48:02,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:02,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058431409] [2020-10-13 04:48:02,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:02,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:02,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:02,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:02,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:02,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:02,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:02,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:07,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:07,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-13 04:48:07,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:48:07,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5076 [2020-10-13 04:48:07,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:07,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:48:07,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-13 04:48:07,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:48:07,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:07,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:07,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:07,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:07,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:07,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:07,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:07,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:07,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:07,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:07,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:07,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:07,259 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-13 04:48:07,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058431409] [2020-10-13 04:48:07,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:07,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:48:07,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712977625] [2020-10-13 04:48:07,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:48:07,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:07,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:48:07,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:48:07,261 INFO L87 Difference]: Start difference. First operand 156 states and 166 transitions. Second operand 10 states. [2020-10-13 04:48:07,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:07,704 INFO L93 Difference]: Finished difference Result 306 states and 333 transitions. [2020-10-13 04:48:07,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:48:07,704 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 151 [2020-10-13 04:48:07,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:07,706 INFO L225 Difference]: With dead ends: 306 [2020-10-13 04:48:07,706 INFO L226 Difference]: Without dead ends: 183 [2020-10-13 04:48:07,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:48:07,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-13 04:48:07,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 174. [2020-10-13 04:48:07,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-13 04:48:07,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 184 transitions. [2020-10-13 04:48:07,714 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 184 transitions. Word has length 151 [2020-10-13 04:48:07,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:07,715 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 184 transitions. [2020-10-13 04:48:07,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:48:07,715 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 184 transitions. [2020-10-13 04:48:07,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-13 04:48:07,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:07,717 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:07,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:48:07,717 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:07,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:07,718 INFO L82 PathProgramCache]: Analyzing trace with hash 589433116, now seen corresponding path program 12 times [2020-10-13 04:48:07,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:07,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194392002] [2020-10-13 04:48:07,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:07,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:07,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:07,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:07,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:07,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:07,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:07,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:12,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:12,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-13 04:48:12,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:48:12,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:48:12,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:12,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:48:12,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:48:12,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:48:12,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:12,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:12,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:12,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:12,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:12,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:12,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:12,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:12,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:12,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:12,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:12,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-13 04:48:12,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194392002] [2020-10-13 04:48:12,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:12,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:48:12,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413995024] [2020-10-13 04:48:12,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:48:12,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:12,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:48:12,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:48:12,822 INFO L87 Difference]: Start difference. First operand 174 states and 184 transitions. Second operand 10 states. [2020-10-13 04:48:12,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:12,953 INFO L93 Difference]: Finished difference Result 332 states and 352 transitions. [2020-10-13 04:48:12,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:48:12,953 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 169 [2020-10-13 04:48:12,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:12,954 INFO L225 Difference]: With dead ends: 332 [2020-10-13 04:48:12,955 INFO L226 Difference]: Without dead ends: 177 [2020-10-13 04:48:12,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:48:12,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-13 04:48:12,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2020-10-13 04:48:12,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-13 04:48:12,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 186 transitions. [2020-10-13 04:48:12,969 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 186 transitions. Word has length 169 [2020-10-13 04:48:12,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:12,970 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 186 transitions. [2020-10-13 04:48:12,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:48:12,970 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 186 transitions. [2020-10-13 04:48:12,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-13 04:48:12,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:12,972 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:12,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:48:12,972 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:12,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:12,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1449211462, now seen corresponding path program 13 times [2020-10-13 04:48:12,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:12,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719750437] [2020-10-13 04:48:12,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:12,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:13,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:13,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:13,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:13,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:13,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:18,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:18,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-13 04:48:18,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:48:18,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-13 04:48:18,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:18,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:48:18,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-13 04:48:18,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:48:18,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:18,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:18,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:18,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:18,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:18,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:18,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:18,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:18,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:18,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:18,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:18,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:18,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:18,151 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-13 04:48:18,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719750437] [2020-10-13 04:48:18,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:18,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:48:18,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668274042] [2020-10-13 04:48:18,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:48:18,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:18,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:48:18,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:48:18,153 INFO L87 Difference]: Start difference. First operand 176 states and 186 transitions. Second operand 11 states. [2020-10-13 04:48:18,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:18,604 INFO L93 Difference]: Finished difference Result 342 states and 369 transitions. [2020-10-13 04:48:18,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:48:18,605 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 171 [2020-10-13 04:48:18,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:18,607 INFO L225 Difference]: With dead ends: 342 [2020-10-13 04:48:18,607 INFO L226 Difference]: Without dead ends: 203 [2020-10-13 04:48:18,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:48:18,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-13 04:48:18,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 194. [2020-10-13 04:48:18,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-13 04:48:18,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 204 transitions. [2020-10-13 04:48:18,615 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 204 transitions. Word has length 171 [2020-10-13 04:48:18,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:18,615 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 204 transitions. [2020-10-13 04:48:18,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:48:18,615 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 204 transitions. [2020-10-13 04:48:18,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-13 04:48:18,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:18,617 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:18,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:48:18,618 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:18,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:18,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1724339576, now seen corresponding path program 14 times [2020-10-13 04:48:18,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:18,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143864934] [2020-10-13 04:48:18,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:18,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:18,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:18,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:18,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:18,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:18,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:23,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:23,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-10-13 04:48:23,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:48:23,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-13 04:48:23,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:23,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:48:23,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:48:23,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:48:23,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:23,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:23,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:23,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:23,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:23,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:23,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:23,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:23,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:23,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:23,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:23,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-13 04:48:23,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143864934] [2020-10-13 04:48:23,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:23,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:48:23,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179452154] [2020-10-13 04:48:23,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:48:23,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:23,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:48:23,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:48:23,781 INFO L87 Difference]: Start difference. First operand 194 states and 204 transitions. Second operand 11 states. [2020-10-13 04:48:23,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:23,937 INFO L93 Difference]: Finished difference Result 370 states and 390 transitions. [2020-10-13 04:48:23,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:48:23,938 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 189 [2020-10-13 04:48:23,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:23,940 INFO L225 Difference]: With dead ends: 370 [2020-10-13 04:48:23,940 INFO L226 Difference]: Without dead ends: 197 [2020-10-13 04:48:23,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:48:23,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-13 04:48:23,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2020-10-13 04:48:23,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-13 04:48:23,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 206 transitions. [2020-10-13 04:48:23,948 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 206 transitions. Word has length 189 [2020-10-13 04:48:23,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:23,949 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 206 transitions. [2020-10-13 04:48:23,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:48:23,949 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 206 transitions. [2020-10-13 04:48:23,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-13 04:48:23,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:23,950 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:23,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:48:23,951 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:23,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:23,951 INFO L82 PathProgramCache]: Analyzing trace with hash -2009272282, now seen corresponding path program 15 times [2020-10-13 04:48:23,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:23,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763132338] [2020-10-13 04:48:23,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:23,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:24,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:24,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:24,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:24,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:24,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:29,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:29,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-13 04:48:29,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:48:29,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5077 [2020-10-13 04:48:29,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:29,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:48:29,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 04:48:29,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:48:29,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:29,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:29,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:29,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:29,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:29,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:29,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:29,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:29,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:29,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:29,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:29,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:29,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:29,163 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-13 04:48:29,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763132338] [2020-10-13 04:48:29,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:29,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:48:29,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61733224] [2020-10-13 04:48:29,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:48:29,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:29,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:48:29,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:48:29,165 INFO L87 Difference]: Start difference. First operand 196 states and 206 transitions. Second operand 12 states. [2020-10-13 04:48:29,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:29,661 INFO L93 Difference]: Finished difference Result 378 states and 405 transitions. [2020-10-13 04:48:29,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:48:29,661 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 191 [2020-10-13 04:48:29,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:29,663 INFO L225 Difference]: With dead ends: 378 [2020-10-13 04:48:29,663 INFO L226 Difference]: Without dead ends: 223 [2020-10-13 04:48:29,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:48:29,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-13 04:48:29,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 214. [2020-10-13 04:48:29,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-13 04:48:29,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 224 transitions. [2020-10-13 04:48:29,674 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 224 transitions. Word has length 191 [2020-10-13 04:48:29,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:29,674 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 224 transitions. [2020-10-13 04:48:29,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:48:29,674 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 224 transitions. [2020-10-13 04:48:29,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-13 04:48:29,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:29,676 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:29,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:48:29,676 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:29,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:29,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1347744268, now seen corresponding path program 16 times [2020-10-13 04:48:29,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:29,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498736418] [2020-10-13 04:48:29,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:29,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:29,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:29,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:29,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:29,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:29,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:29,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:34,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:34,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-13 04:48:34,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:48:34,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-13 04:48:34,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:34,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:48:34,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:48:34,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:48:34,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:34,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:34,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:34,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:34,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:34,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:34,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:34,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:34,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:34,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:34,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:34,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:34,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:34,917 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-10-13 04:48:34,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498736418] [2020-10-13 04:48:34,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:34,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:48:34,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332372704] [2020-10-13 04:48:34,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:48:34,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:34,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:48:34,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:48:34,920 INFO L87 Difference]: Start difference. First operand 214 states and 224 transitions. Second operand 12 states. [2020-10-13 04:48:35,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:35,090 INFO L93 Difference]: Finished difference Result 408 states and 428 transitions. [2020-10-13 04:48:35,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:48:35,091 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 209 [2020-10-13 04:48:35,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:35,092 INFO L225 Difference]: With dead ends: 408 [2020-10-13 04:48:35,093 INFO L226 Difference]: Without dead ends: 217 [2020-10-13 04:48:35,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:48:35,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-13 04:48:35,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 216. [2020-10-13 04:48:35,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-13 04:48:35,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 226 transitions. [2020-10-13 04:48:35,102 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 226 transitions. Word has length 209 [2020-10-13 04:48:35,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:35,103 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 226 transitions. [2020-10-13 04:48:35,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:48:35,103 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 226 transitions. [2020-10-13 04:48:35,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-13 04:48:35,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:35,104 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:35,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:48:35,105 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:35,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:35,105 INFO L82 PathProgramCache]: Analyzing trace with hash -180201326, now seen corresponding path program 17 times [2020-10-13 04:48:35,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:35,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703982375] [2020-10-13 04:48:35,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:35,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:35,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:35,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:35,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:35,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:35,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:35,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:40,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:40,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-13 04:48:40,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:48:40,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 04:48:40,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:40,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:48:40,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:48:40,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:48:40,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:40,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:40,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:40,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:40,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:40,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:40,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:40,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:40,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:40,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:40,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:40,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-10-13 04:48:40,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703982375] [2020-10-13 04:48:40,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:40,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:48:40,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630269206] [2020-10-13 04:48:40,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:48:40,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:40,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:48:40,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:48:40,286 INFO L87 Difference]: Start difference. First operand 216 states and 226 transitions. Second operand 13 states. [2020-10-13 04:48:40,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:40,457 INFO L93 Difference]: Finished difference Result 410 states and 430 transitions. [2020-10-13 04:48:40,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:48:40,457 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 211 [2020-10-13 04:48:40,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:40,459 INFO L225 Difference]: With dead ends: 410 [2020-10-13 04:48:40,459 INFO L226 Difference]: Without dead ends: 219 [2020-10-13 04:48:40,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:48:40,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-13 04:48:40,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2020-10-13 04:48:40,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-10-13 04:48:40,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 228 transitions. [2020-10-13 04:48:40,468 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 228 transitions. Word has length 211 [2020-10-13 04:48:40,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:40,469 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 228 transitions. [2020-10-13 04:48:40,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:48:40,469 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 228 transitions. [2020-10-13 04:48:40,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-13 04:48:40,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:40,470 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:40,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:48:40,470 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:40,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:40,471 INFO L82 PathProgramCache]: Analyzing trace with hash 842101680, now seen corresponding path program 18 times [2020-10-13 04:48:40,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:40,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423185956] [2020-10-13 04:48:40,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:40,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:40,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:40,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:40,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:40,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:40,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:40,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:45,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:45,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-13 04:48:45,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:48:45,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5101 [2020-10-13 04:48:45,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:45,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:48:45,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-13 04:48:45,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:48:45,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:45,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:45,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:45,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:45,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:45,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:45,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:45,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:48:45,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:45,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:45,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:45,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:45,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:45,724 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2020-10-13 04:48:45,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423185956] [2020-10-13 04:48:45,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:45,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:48:45,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629264271] [2020-10-13 04:48:45,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:48:45,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:45,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:48:45,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:48:45,726 INFO L87 Difference]: Start difference. First operand 218 states and 228 transitions. Second operand 13 states. [2020-10-13 04:48:46,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:46,277 INFO L93 Difference]: Finished difference Result 416 states and 443 transitions. [2020-10-13 04:48:46,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:48:46,278 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 213 [2020-10-13 04:48:46,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:46,280 INFO L225 Difference]: With dead ends: 416 [2020-10-13 04:48:46,280 INFO L226 Difference]: Without dead ends: 245 [2020-10-13 04:48:46,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:48:46,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-10-13 04:48:46,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 236. [2020-10-13 04:48:46,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-13 04:48:46,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 246 transitions. [2020-10-13 04:48:46,298 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 246 transitions. Word has length 213 [2020-10-13 04:48:46,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:46,299 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 246 transitions. [2020-10-13 04:48:46,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:48:46,299 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 246 transitions. [2020-10-13 04:48:46,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-13 04:48:46,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:46,302 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:46,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:48:46,303 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:46,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:46,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1948384514, now seen corresponding path program 19 times [2020-10-13 04:48:46,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:46,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034129898] [2020-10-13 04:48:46,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:46,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:46,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:46,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:46,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:46,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:46,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:46,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:51,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:51,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-10-13 04:48:51,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:48:51,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5206 [2020-10-13 04:48:51,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:51,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:48:51,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:48:51,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:48:51,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:51,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:51,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:51,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:51,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:51,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:51,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:51,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:51,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:51,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:51,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:51,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:51,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:51,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1000 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-13 04:48:51,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034129898] [2020-10-13 04:48:51,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:51,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:48:51,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828835936] [2020-10-13 04:48:51,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:48:51,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:51,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:48:51,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:48:51,690 INFO L87 Difference]: Start difference. First operand 236 states and 246 transitions. Second operand 14 states. [2020-10-13 04:48:51,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:51,875 INFO L93 Difference]: Finished difference Result 448 states and 468 transitions. [2020-10-13 04:48:51,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:48:51,876 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 231 [2020-10-13 04:48:51,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:51,877 INFO L225 Difference]: With dead ends: 448 [2020-10-13 04:48:51,877 INFO L226 Difference]: Without dead ends: 239 [2020-10-13 04:48:51,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:48:51,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-13 04:48:51,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2020-10-13 04:48:51,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-13 04:48:51,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 248 transitions. [2020-10-13 04:48:51,888 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 248 transitions. Word has length 231 [2020-10-13 04:48:51,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:51,889 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 248 transitions. [2020-10-13 04:48:51,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:48:51,889 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 248 transitions. [2020-10-13 04:48:51,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-13 04:48:51,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:51,891 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:51,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:48:51,892 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:51,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:51,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1759616228, now seen corresponding path program 20 times [2020-10-13 04:48:51,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:51,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698574096] [2020-10-13 04:48:51,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:51,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:51,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:52,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:52,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:52,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:52,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:57,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:57,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-10-13 04:48:57,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:48:57,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5237 [2020-10-13 04:48:57,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:57,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:48:57,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-13 04:48:57,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:48:57,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:57,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:57,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:57,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:57,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:57,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:57,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:57,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:57,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:57,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:57,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:57,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:57,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 921 trivial. 0 not checked. [2020-10-13 04:48:57,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698574096] [2020-10-13 04:48:57,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:57,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:48:57,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571786139] [2020-10-13 04:48:57,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:48:57,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:57,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:48:57,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:48:57,317 INFO L87 Difference]: Start difference. First operand 238 states and 248 transitions. Second operand 14 states. [2020-10-13 04:48:57,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:57,893 INFO L93 Difference]: Finished difference Result 452 states and 479 transitions. [2020-10-13 04:48:57,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:48:57,893 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 233 [2020-10-13 04:48:57,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:57,895 INFO L225 Difference]: With dead ends: 452 [2020-10-13 04:48:57,895 INFO L226 Difference]: Without dead ends: 265 [2020-10-13 04:48:57,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:48:57,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-10-13 04:48:57,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 256. [2020-10-13 04:48:57,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-13 04:48:57,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 266 transitions. [2020-10-13 04:48:57,905 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 266 transitions. Word has length 233 [2020-10-13 04:48:57,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:57,906 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 266 transitions. [2020-10-13 04:48:57,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:48:57,906 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 266 transitions. [2020-10-13 04:48:57,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-13 04:48:57,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:57,908 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:57,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:48:57,908 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:57,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:57,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1958670186, now seen corresponding path program 21 times [2020-10-13 04:48:57,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:57,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883385414] [2020-10-13 04:48:57,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:57,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:57,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:57,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:58,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:58,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:58,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:58,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:02,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:02,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 259 [2020-10-13 04:49:02,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:49:02,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5063 [2020-10-13 04:49:02,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:02,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:49:02,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:49:02,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:49:02,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:03,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:03,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:03,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:03,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:03,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:03,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:03,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:03,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:03,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:03,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:03,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:03,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:03,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2020-10-13 04:49:03,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883385414] [2020-10-13 04:49:03,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:03,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:49:03,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982725102] [2020-10-13 04:49:03,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:49:03,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:03,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:49:03,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:49:03,155 INFO L87 Difference]: Start difference. First operand 256 states and 266 transitions. Second operand 15 states. [2020-10-13 04:49:03,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:03,324 INFO L93 Difference]: Finished difference Result 486 states and 506 transitions. [2020-10-13 04:49:03,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:49:03,325 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 251 [2020-10-13 04:49:03,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:03,327 INFO L225 Difference]: With dead ends: 486 [2020-10-13 04:49:03,327 INFO L226 Difference]: Without dead ends: 259 [2020-10-13 04:49:03,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:49:03,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-13 04:49:03,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 258. [2020-10-13 04:49:03,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-13 04:49:03,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 268 transitions. [2020-10-13 04:49:03,337 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 268 transitions. Word has length 251 [2020-10-13 04:49:03,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:03,338 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 268 transitions. [2020-10-13 04:49:03,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:49:03,338 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 268 transitions. [2020-10-13 04:49:03,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-13 04:49:03,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:03,339 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:03,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:49:03,343 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:03,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:03,343 INFO L82 PathProgramCache]: Analyzing trace with hash 905712776, now seen corresponding path program 22 times [2020-10-13 04:49:03,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:03,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497557635] [2020-10-13 04:49:03,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:03,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:03,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:03,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:03,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:03,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:03,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:08,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:08,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 261 [2020-10-13 04:49:08,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:49:08,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-13 04:49:08,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:08,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:49:08,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-13 04:49:08,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:49:08,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:08,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:08,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:08,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:08,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:08,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:08,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:08,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:08,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:08,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:08,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:08,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:49:08,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1233 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1112 trivial. 0 not checked. [2020-10-13 04:49:08,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497557635] [2020-10-13 04:49:08,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:08,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:49:08,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098545705] [2020-10-13 04:49:08,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:49:08,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:08,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:49:08,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:49:08,593 INFO L87 Difference]: Start difference. First operand 258 states and 268 transitions. Second operand 15 states. [2020-10-13 04:49:09,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:09,187 INFO L93 Difference]: Finished difference Result 488 states and 515 transitions. [2020-10-13 04:49:09,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:49:09,187 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 253 [2020-10-13 04:49:09,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:09,190 INFO L225 Difference]: With dead ends: 488 [2020-10-13 04:49:09,190 INFO L226 Difference]: Without dead ends: 285 [2020-10-13 04:49:09,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:49:09,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-13 04:49:09,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 276. [2020-10-13 04:49:09,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-13 04:49:09,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 286 transitions. [2020-10-13 04:49:09,200 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 286 transitions. Word has length 253 [2020-10-13 04:49:09,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:09,200 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 286 transitions. [2020-10-13 04:49:09,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:49:09,200 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 286 transitions. [2020-10-13 04:49:09,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-10-13 04:49:09,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:09,202 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:09,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:49:09,202 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:09,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:09,203 INFO L82 PathProgramCache]: Analyzing trace with hash -434889258, now seen corresponding path program 23 times [2020-10-13 04:49:09,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:09,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289297387] [2020-10-13 04:49:09,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:09,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:09,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:09,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:09,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:09,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:09,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:09,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:14,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:14,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 279 [2020-10-13 04:49:14,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:49:14,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5205 [2020-10-13 04:49:14,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:14,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:49:14,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-13 04:49:14,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:49:14,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:14,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:14,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:14,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:14,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:14,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:14,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:14,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:14,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:14,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:14,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:14,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:14,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:14,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1440 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2020-10-13 04:49:14,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289297387] [2020-10-13 04:49:14,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:14,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:49:14,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739354356] [2020-10-13 04:49:14,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:49:14,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:14,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:49:14,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:49:14,631 INFO L87 Difference]: Start difference. First operand 276 states and 286 transitions. Second operand 16 states. [2020-10-13 04:49:15,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:15,202 INFO L93 Difference]: Finished difference Result 522 states and 549 transitions. [2020-10-13 04:49:15,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:49:15,203 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 271 [2020-10-13 04:49:15,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:15,205 INFO L225 Difference]: With dead ends: 522 [2020-10-13 04:49:15,205 INFO L226 Difference]: Without dead ends: 303 [2020-10-13 04:49:15,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:49:15,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-13 04:49:15,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 294. [2020-10-13 04:49:15,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-10-13 04:49:15,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 304 transitions. [2020-10-13 04:49:15,215 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 304 transitions. Word has length 271 [2020-10-13 04:49:15,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:15,215 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 304 transitions. [2020-10-13 04:49:15,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:49:15,215 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 304 transitions. [2020-10-13 04:49:15,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-10-13 04:49:15,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:15,217 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:15,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:49:15,218 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:15,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:15,218 INFO L82 PathProgramCache]: Analyzing trace with hash 104214436, now seen corresponding path program 24 times [2020-10-13 04:49:15,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:15,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493153816] [2020-10-13 04:49:15,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:15,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:15,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:15,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:15,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:15,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:15,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:15,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:20,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:20,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 297 [2020-10-13 04:49:20,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:49:20,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 04:49:20,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:20,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:49:20,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:49:20,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:49:20,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:20,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:20,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:20,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:20,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:20,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:20,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:20,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:20,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:20,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:20,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:20,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:20,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2020-10-13 04:49:20,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493153816] [2020-10-13 04:49:20,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:20,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:49:20,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061566267] [2020-10-13 04:49:20,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:49:20,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:20,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:49:20,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:49:20,448 INFO L87 Difference]: Start difference. First operand 294 states and 304 transitions. Second operand 16 states. [2020-10-13 04:49:20,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:20,635 INFO L93 Difference]: Finished difference Result 560 states and 580 transitions. [2020-10-13 04:49:20,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:49:20,636 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 289 [2020-10-13 04:49:20,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:20,637 INFO L225 Difference]: With dead ends: 560 [2020-10-13 04:49:20,637 INFO L226 Difference]: Without dead ends: 297 [2020-10-13 04:49:20,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:49:20,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-13 04:49:20,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 296. [2020-10-13 04:49:20,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-10-13 04:49:20,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 306 transitions. [2020-10-13 04:49:20,647 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 306 transitions. Word has length 289 [2020-10-13 04:49:20,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:20,647 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 306 transitions. [2020-10-13 04:49:20,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:49:20,648 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 306 transitions. [2020-10-13 04:49:20,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-10-13 04:49:20,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:20,650 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:20,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:49:20,650 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:20,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:20,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1551069630, now seen corresponding path program 25 times [2020-10-13 04:49:20,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:20,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291064433] [2020-10-13 04:49:20,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:20,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:20,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:20,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:20,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:20,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:20,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:20,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:25,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:25,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 299 [2020-10-13 04:49:25,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:49:25,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5192 [2020-10-13 04:49:25,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:25,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:49:25,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:49:25,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:49:25,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:26,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:26,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:26,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:26,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:26,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:26,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:26,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:49:26,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:26,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:26,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:26,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:26,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:26,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1690 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2020-10-13 04:49:26,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291064433] [2020-10-13 04:49:26,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:26,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:49:26,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669437413] [2020-10-13 04:49:26,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:49:26,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:26,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:49:26,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:49:26,191 INFO L87 Difference]: Start difference. First operand 296 states and 306 transitions. Second operand 17 states. [2020-10-13 04:49:26,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:26,466 INFO L93 Difference]: Finished difference Result 562 states and 582 transitions. [2020-10-13 04:49:26,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:49:26,467 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 291 [2020-10-13 04:49:26,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:26,470 INFO L225 Difference]: With dead ends: 562 [2020-10-13 04:49:26,470 INFO L226 Difference]: Without dead ends: 299 [2020-10-13 04:49:26,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:49:26,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-13 04:49:26,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 298. [2020-10-13 04:49:26,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-10-13 04:49:26,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 308 transitions. [2020-10-13 04:49:26,483 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 308 transitions. Word has length 291 [2020-10-13 04:49:26,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:26,484 INFO L479 AbstractCegarLoop]: Abstraction has 298 states and 308 transitions. [2020-10-13 04:49:26,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:49:26,484 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 308 transitions. [2020-10-13 04:49:26,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-10-13 04:49:26,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:26,488 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:26,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:49:26,488 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:26,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:26,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1153809760, now seen corresponding path program 26 times [2020-10-13 04:49:26,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:26,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139280627] [2020-10-13 04:49:26,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:26,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:26,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:26,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:26,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:26,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:31,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:31,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 301 [2020-10-13 04:49:31,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:49:31,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5125 [2020-10-13 04:49:31,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:31,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:49:31,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-13 04:49:31,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:49:31,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:31,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:31,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:31,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:31,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:31,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:31,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:31,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:49:31,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:31,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:31,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:31,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:31,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:49:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1548 trivial. 0 not checked. [2020-10-13 04:49:31,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139280627] [2020-10-13 04:49:31,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:31,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:49:31,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802916702] [2020-10-13 04:49:31,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:49:31,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:31,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:49:31,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:49:31,980 INFO L87 Difference]: Start difference. First operand 298 states and 308 transitions. Second operand 17 states. [2020-10-13 04:49:32,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:32,743 INFO L93 Difference]: Finished difference Result 560 states and 587 transitions. [2020-10-13 04:49:32,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:49:32,744 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 293 [2020-10-13 04:49:32,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:32,746 INFO L225 Difference]: With dead ends: 560 [2020-10-13 04:49:32,746 INFO L226 Difference]: Without dead ends: 325 [2020-10-13 04:49:32,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:49:32,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-13 04:49:32,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 316. [2020-10-13 04:49:32,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-10-13 04:49:32,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 326 transitions. [2020-10-13 04:49:32,756 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 326 transitions. Word has length 293 [2020-10-13 04:49:32,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:32,757 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 326 transitions. [2020-10-13 04:49:32,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:49:32,757 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 326 transitions. [2020-10-13 04:49:32,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-10-13 04:49:32,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:32,759 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:32,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:49:32,759 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:32,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:32,759 INFO L82 PathProgramCache]: Analyzing trace with hash 2119647406, now seen corresponding path program 27 times [2020-10-13 04:49:32,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:32,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116347714] [2020-10-13 04:49:32,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:32,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:32,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:32,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:32,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:32,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:33,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:33,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:38,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:38,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 319 [2020-10-13 04:49:38,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:49:38,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5228 [2020-10-13 04:49:38,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:38,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:49:38,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 04:49:38,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:49:38,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:38,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:38,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:38,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:38,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:38,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:38,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:38,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:38,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:38,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:38,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:38,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:38,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:38,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1960 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2020-10-13 04:49:38,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116347714] [2020-10-13 04:49:38,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:38,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:49:38,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380149586] [2020-10-13 04:49:38,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:49:38,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:38,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:49:38,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:49:38,320 INFO L87 Difference]: Start difference. First operand 316 states and 326 transitions. Second operand 18 states. [2020-10-13 04:49:39,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:39,110 INFO L93 Difference]: Finished difference Result 594 states and 621 transitions. [2020-10-13 04:49:39,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:49:39,110 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 311 [2020-10-13 04:49:39,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:39,112 INFO L225 Difference]: With dead ends: 594 [2020-10-13 04:49:39,113 INFO L226 Difference]: Without dead ends: 343 [2020-10-13 04:49:39,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:49:39,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-10-13 04:49:39,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 334. [2020-10-13 04:49:39,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-10-13 04:49:39,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 344 transitions. [2020-10-13 04:49:39,123 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 344 transitions. Word has length 311 [2020-10-13 04:49:39,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:39,124 INFO L479 AbstractCegarLoop]: Abstraction has 334 states and 344 transitions. [2020-10-13 04:49:39,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:49:39,124 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 344 transitions. [2020-10-13 04:49:39,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-10-13 04:49:39,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:39,126 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:39,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:49:39,126 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:39,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:39,127 INFO L82 PathProgramCache]: Analyzing trace with hash 724061308, now seen corresponding path program 28 times [2020-10-13 04:49:39,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:39,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316356122] [2020-10-13 04:49:39,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:39,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:39,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:39,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:39,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:39,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:39,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:39,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:44,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:44,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 337 [2020-10-13 04:49:44,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:49:44,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5202 [2020-10-13 04:49:44,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:44,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:49:44,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:49:44,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:49:44,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:44,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:44,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:44,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:44,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:44,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:44,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:44,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:44,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:44,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:44,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:44,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:44,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2221 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2025 trivial. 0 not checked. [2020-10-13 04:49:44,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316356122] [2020-10-13 04:49:44,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:44,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:49:44,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721861875] [2020-10-13 04:49:44,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:49:44,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:44,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:49:44,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:49:44,603 INFO L87 Difference]: Start difference. First operand 334 states and 344 transitions. Second operand 18 states. [2020-10-13 04:49:44,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:44,804 INFO L93 Difference]: Finished difference Result 636 states and 656 transitions. [2020-10-13 04:49:44,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:49:44,804 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 329 [2020-10-13 04:49:44,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:44,807 INFO L225 Difference]: With dead ends: 636 [2020-10-13 04:49:44,807 INFO L226 Difference]: Without dead ends: 337 [2020-10-13 04:49:44,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:49:44,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-13 04:49:44,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 336. [2020-10-13 04:49:44,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-13 04:49:44,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 346 transitions. [2020-10-13 04:49:44,817 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 346 transitions. Word has length 329 [2020-10-13 04:49:44,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:44,817 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 346 transitions. [2020-10-13 04:49:44,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:49:44,818 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 346 transitions. [2020-10-13 04:49:44,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-13 04:49:44,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:44,820 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:44,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:49:44,820 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:44,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:44,821 INFO L82 PathProgramCache]: Analyzing trace with hash -719112934, now seen corresponding path program 29 times [2020-10-13 04:49:44,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:44,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707463076] [2020-10-13 04:49:44,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:44,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:44,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:44,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:45,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:45,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:45,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:50,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:50,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-10-13 04:49:50,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:49:50,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5287 [2020-10-13 04:49:50,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:50,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:49:50,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 171 [2020-10-13 04:49:50,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:49:50,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:50,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:50,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:50,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:50,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:50,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:50,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:50,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:49:50,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:50,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:50,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:50,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:50,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:50,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2250 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2025 trivial. 0 not checked. [2020-10-13 04:49:50,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707463076] [2020-10-13 04:49:50,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:50,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:49:50,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920231425] [2020-10-13 04:49:50,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:49:50,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:50,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:49:50,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:49:50,423 INFO L87 Difference]: Start difference. First operand 336 states and 346 transitions. Second operand 19 states. [2020-10-13 04:49:51,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:51,252 INFO L93 Difference]: Finished difference Result 630 states and 657 transitions. [2020-10-13 04:49:51,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:49:51,252 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 331 [2020-10-13 04:49:51,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:51,254 INFO L225 Difference]: With dead ends: 630 [2020-10-13 04:49:51,254 INFO L226 Difference]: Without dead ends: 363 [2020-10-13 04:49:51,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:49:51,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-10-13 04:49:51,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 354. [2020-10-13 04:49:51,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-13 04:49:51,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 364 transitions. [2020-10-13 04:49:51,264 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 364 transitions. Word has length 331 [2020-10-13 04:49:51,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:51,264 INFO L479 AbstractCegarLoop]: Abstraction has 354 states and 364 transitions. [2020-10-13 04:49:51,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:49:51,265 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 364 transitions. [2020-10-13 04:49:51,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-10-13 04:49:51,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:51,267 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:51,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:49:51,267 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:51,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:51,268 INFO L82 PathProgramCache]: Analyzing trace with hash -968819224, now seen corresponding path program 30 times [2020-10-13 04:49:51,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:51,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692716427] [2020-10-13 04:49:51,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:51,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:51,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:51,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:51,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:51,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:51,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:51,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:56,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:56,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 357 [2020-10-13 04:49:56,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:49:56,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5087 [2020-10-13 04:49:56,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:56,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:49:56,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:49:56,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:49:56,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:56,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:56,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:56,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:56,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:56,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:56,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:56,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:56,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:56,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:56,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:56,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:56,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:49:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2529 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2304 trivial. 0 not checked. [2020-10-13 04:49:56,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692716427] [2020-10-13 04:49:56,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:56,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:49:56,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139983130] [2020-10-13 04:49:56,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:49:56,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:56,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:49:56,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:49:56,732 INFO L87 Difference]: Start difference. First operand 354 states and 364 transitions. Second operand 19 states. [2020-10-13 04:49:56,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:56,900 INFO L93 Difference]: Finished difference Result 674 states and 694 transitions. [2020-10-13 04:49:56,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:49:56,900 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 349 [2020-10-13 04:49:56,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:56,902 INFO L225 Difference]: With dead ends: 674 [2020-10-13 04:49:56,902 INFO L226 Difference]: Without dead ends: 357 [2020-10-13 04:49:56,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:49:56,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-10-13 04:49:56,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 356. [2020-10-13 04:49:56,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-10-13 04:49:56,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 366 transitions. [2020-10-13 04:49:56,914 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 366 transitions. Word has length 349 [2020-10-13 04:49:56,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:56,915 INFO L479 AbstractCegarLoop]: Abstraction has 356 states and 366 transitions. [2020-10-13 04:49:56,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:49:56,915 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 366 transitions. [2020-10-13 04:49:56,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-10-13 04:49:56,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:56,918 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:56,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:49:56,918 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:56,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:56,918 INFO L82 PathProgramCache]: Analyzing trace with hash 337603462, now seen corresponding path program 31 times [2020-10-13 04:49:56,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:56,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510083003] [2020-10-13 04:49:56,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:56,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:56,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:57,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:57,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:57,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:57,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:02,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:02,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 359 [2020-10-13 04:50:02,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:50:02,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5259 [2020-10-13 04:50:02,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:02,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:50:02,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-13 04:50:02,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:50:02,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:02,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:02,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:02,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:02,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:02,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:02,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:02,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:02,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:02,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:02,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:02,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:02,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:02,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2560 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2304 trivial. 0 not checked. [2020-10-13 04:50:02,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510083003] [2020-10-13 04:50:02,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:02,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:50:02,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714107879] [2020-10-13 04:50:02,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:50:02,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:02,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:50:02,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:50:02,538 INFO L87 Difference]: Start difference. First operand 356 states and 366 transitions. Second operand 20 states. [2020-10-13 04:50:03,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:03,288 INFO L93 Difference]: Finished difference Result 666 states and 693 transitions. [2020-10-13 04:50:03,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:50:03,289 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 351 [2020-10-13 04:50:03,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:03,291 INFO L225 Difference]: With dead ends: 666 [2020-10-13 04:50:03,291 INFO L226 Difference]: Without dead ends: 383 [2020-10-13 04:50:03,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:50:03,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-10-13 04:50:03,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 374. [2020-10-13 04:50:03,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-10-13 04:50:03,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 384 transitions. [2020-10-13 04:50:03,301 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 384 transitions. Word has length 351 [2020-10-13 04:50:03,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:03,302 INFO L479 AbstractCegarLoop]: Abstraction has 374 states and 384 transitions. [2020-10-13 04:50:03,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:50:03,302 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 384 transitions. [2020-10-13 04:50:03,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2020-10-13 04:50:03,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:03,304 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:03,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:50:03,305 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:03,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:03,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1691520684, now seen corresponding path program 32 times [2020-10-13 04:50:03,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:03,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856750071] [2020-10-13 04:50:03,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:03,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:03,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:03,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:03,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:03,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:03,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:08,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:08,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 377 [2020-10-13 04:50:08,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:50:08,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5274 [2020-10-13 04:50:08,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:08,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:50:08,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:08,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:50:08,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:08,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:08,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:08,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:08,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:08,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:08,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:08,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:08,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:08,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:08,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:08,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:08,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2857 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2601 trivial. 0 not checked. [2020-10-13 04:50:08,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856750071] [2020-10-13 04:50:08,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:08,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:50:08,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39797341] [2020-10-13 04:50:08,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:50:08,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:08,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:50:08,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:50:08,893 INFO L87 Difference]: Start difference. First operand 374 states and 384 transitions. Second operand 20 states. [2020-10-13 04:50:09,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:09,071 INFO L93 Difference]: Finished difference Result 712 states and 732 transitions. [2020-10-13 04:50:09,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:50:09,072 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 369 [2020-10-13 04:50:09,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:09,074 INFO L225 Difference]: With dead ends: 712 [2020-10-13 04:50:09,075 INFO L226 Difference]: Without dead ends: 377 [2020-10-13 04:50:09,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:50:09,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-10-13 04:50:09,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 376. [2020-10-13 04:50:09,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2020-10-13 04:50:09,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 386 transitions. [2020-10-13 04:50:09,084 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 386 transitions. Word has length 369 [2020-10-13 04:50:09,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:09,085 INFO L479 AbstractCegarLoop]: Abstraction has 376 states and 386 transitions. [2020-10-13 04:50:09,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:50:09,085 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 386 transitions. [2020-10-13 04:50:09,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2020-10-13 04:50:09,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:09,087 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:09,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 04:50:09,088 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:09,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:09,088 INFO L82 PathProgramCache]: Analyzing trace with hash 888857586, now seen corresponding path program 33 times [2020-10-13 04:50:09,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:09,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228355318] [2020-10-13 04:50:09,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:09,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:09,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:09,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:09,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:09,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:09,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:14,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:14,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 379 [2020-10-13 04:50:14,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:50:14,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5149 [2020-10-13 04:50:14,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:14,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:50:14,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:14,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:50:14,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:14,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:14,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:14,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:14,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:14,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:14,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:14,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:14,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:14,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:14,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:14,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:14,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:14,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2890 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2601 trivial. 0 not checked. [2020-10-13 04:50:14,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228355318] [2020-10-13 04:50:14,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:14,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:50:14,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020134625] [2020-10-13 04:50:14,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:50:14,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:14,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:50:14,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:50:14,574 INFO L87 Difference]: Start difference. First operand 376 states and 386 transitions. Second operand 21 states. [2020-10-13 04:50:14,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:14,789 INFO L93 Difference]: Finished difference Result 714 states and 734 transitions. [2020-10-13 04:50:14,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:50:14,790 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 371 [2020-10-13 04:50:14,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:14,791 INFO L225 Difference]: With dead ends: 714 [2020-10-13 04:50:14,792 INFO L226 Difference]: Without dead ends: 379 [2020-10-13 04:50:14,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:50:14,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-10-13 04:50:14,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 378. [2020-10-13 04:50:14,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2020-10-13 04:50:14,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 388 transitions. [2020-10-13 04:50:14,801 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 388 transitions. Word has length 371 [2020-10-13 04:50:14,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:14,802 INFO L479 AbstractCegarLoop]: Abstraction has 378 states and 388 transitions. [2020-10-13 04:50:14,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:50:14,802 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 388 transitions. [2020-10-13 04:50:14,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2020-10-13 04:50:14,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:14,804 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:14,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 04:50:14,805 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:14,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:14,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1858722032, now seen corresponding path program 34 times [2020-10-13 04:50:14,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:14,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528544969] [2020-10-13 04:50:14,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:14,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:14,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:14,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:14,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:15,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:15,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:20,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:20,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 381 [2020-10-13 04:50:20,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:50:20,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5401 [2020-10-13 04:50:20,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:20,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:50:20,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 121 [2020-10-13 04:50:20,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:50:20,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:20,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:20,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:20,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:20,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:20,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:20,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:20,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:20,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:20,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:20,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:20,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:20,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2925 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2636 trivial. 0 not checked. [2020-10-13 04:50:20,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528544969] [2020-10-13 04:50:20,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:20,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:50:20,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394900684] [2020-10-13 04:50:20,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:50:20,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:20,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:50:20,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:50:20,556 INFO L87 Difference]: Start difference. First operand 378 states and 388 transitions. Second operand 21 states. [2020-10-13 04:50:21,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:21,478 INFO L93 Difference]: Finished difference Result 704 states and 731 transitions. [2020-10-13 04:50:21,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:50:21,479 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 373 [2020-10-13 04:50:21,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:21,481 INFO L225 Difference]: With dead ends: 704 [2020-10-13 04:50:21,481 INFO L226 Difference]: Without dead ends: 405 [2020-10-13 04:50:21,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:50:21,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-10-13 04:50:21,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 396. [2020-10-13 04:50:21,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2020-10-13 04:50:21,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 406 transitions. [2020-10-13 04:50:21,491 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 406 transitions. Word has length 373 [2020-10-13 04:50:21,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:21,491 INFO L479 AbstractCegarLoop]: Abstraction has 396 states and 406 transitions. [2020-10-13 04:50:21,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:50:21,492 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 406 transitions. [2020-10-13 04:50:21,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-10-13 04:50:21,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:21,494 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:21,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 04:50:21,495 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:21,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:21,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1055170142, now seen corresponding path program 35 times [2020-10-13 04:50:21,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:21,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674064008] [2020-10-13 04:50:21,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:21,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:21,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:21,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:21,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:21,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:21,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:26,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:26,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 399 [2020-10-13 04:50:26,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:50:26,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5078 [2020-10-13 04:50:26,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:26,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:50:26,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 163 [2020-10-13 04:50:26,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:50:26,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:26,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:26,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:26,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:26,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:26,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:26,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:26,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:26,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:26,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:26,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:26,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:26,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2916 trivial. 0 not checked. [2020-10-13 04:50:26,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674064008] [2020-10-13 04:50:26,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:26,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:50:26,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819090531] [2020-10-13 04:50:26,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:50:26,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:26,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:50:26,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:50:26,982 INFO L87 Difference]: Start difference. First operand 396 states and 406 transitions. Second operand 22 states. [2020-10-13 04:50:27,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:27,932 INFO L93 Difference]: Finished difference Result 738 states and 765 transitions. [2020-10-13 04:50:27,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:50:27,933 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 391 [2020-10-13 04:50:27,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:27,935 INFO L225 Difference]: With dead ends: 738 [2020-10-13 04:50:27,935 INFO L226 Difference]: Without dead ends: 423 [2020-10-13 04:50:27,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:50:27,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-13 04:50:27,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 414. [2020-10-13 04:50:27,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2020-10-13 04:50:27,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 424 transitions. [2020-10-13 04:50:27,946 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 424 transitions. Word has length 391 [2020-10-13 04:50:27,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:27,946 INFO L479 AbstractCegarLoop]: Abstraction has 414 states and 424 transitions. [2020-10-13 04:50:27,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:50:27,946 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 424 transitions. [2020-10-13 04:50:27,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-10-13 04:50:27,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:27,949 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:27,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 04:50:27,949 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:27,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:27,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1614963156, now seen corresponding path program 36 times [2020-10-13 04:50:27,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:27,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350183277] [2020-10-13 04:50:27,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:27,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:28,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:28,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:28,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:28,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:28,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:32,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:32,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 417 [2020-10-13 04:50:32,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:50:32,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 04:50:32,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:32,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:50:32,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:32,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:50:32,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:33,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:33,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:33,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:33,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:33,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:33,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:33,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:33,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:33,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:33,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:33,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:33,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3573 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 3249 trivial. 0 not checked. [2020-10-13 04:50:33,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350183277] [2020-10-13 04:50:33,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:33,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:50:33,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602762822] [2020-10-13 04:50:33,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:50:33,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:33,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:50:33,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:50:33,339 INFO L87 Difference]: Start difference. First operand 414 states and 424 transitions. Second operand 22 states. [2020-10-13 04:50:33,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:33,513 INFO L93 Difference]: Finished difference Result 788 states and 808 transitions. [2020-10-13 04:50:33,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:50:33,514 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 409 [2020-10-13 04:50:33,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:33,517 INFO L225 Difference]: With dead ends: 788 [2020-10-13 04:50:33,517 INFO L226 Difference]: Without dead ends: 417 [2020-10-13 04:50:33,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:50:33,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-13 04:50:33,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 416. [2020-10-13 04:50:33,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2020-10-13 04:50:33,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 426 transitions. [2020-10-13 04:50:33,526 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 426 transitions. Word has length 409 [2020-10-13 04:50:33,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:33,527 INFO L479 AbstractCegarLoop]: Abstraction has 416 states and 426 transitions. [2020-10-13 04:50:33,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:50:33,527 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 426 transitions. [2020-10-13 04:50:33,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2020-10-13 04:50:33,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:33,530 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:33,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 04:50:33,530 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:33,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:33,530 INFO L82 PathProgramCache]: Analyzing trace with hash -963929398, now seen corresponding path program 37 times [2020-10-13 04:50:33,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:33,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45856409] [2020-10-13 04:50:33,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:33,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:33,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:33,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:33,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:33,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:34,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:38,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:38,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 419 [2020-10-13 04:50:38,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:50:38,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5101 [2020-10-13 04:50:38,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:38,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:50:38,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 04:50:38,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:50:38,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:38,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:38,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:38,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:38,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:38,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:38,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:38,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:38,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:38,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:38,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:38,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:38,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:39,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3610 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 3249 trivial. 0 not checked. [2020-10-13 04:50:39,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45856409] [2020-10-13 04:50:39,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:39,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:50:39,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958966325] [2020-10-13 04:50:39,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:50:39,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:39,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:50:39,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:50:39,092 INFO L87 Difference]: Start difference. First operand 416 states and 426 transitions. Second operand 23 states. [2020-10-13 04:50:40,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:40,013 INFO L93 Difference]: Finished difference Result 774 states and 801 transitions. [2020-10-13 04:50:40,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:50:40,013 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 411 [2020-10-13 04:50:40,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:40,016 INFO L225 Difference]: With dead ends: 774 [2020-10-13 04:50:40,016 INFO L226 Difference]: Without dead ends: 443 [2020-10-13 04:50:40,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:50:40,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-10-13 04:50:40,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 434. [2020-10-13 04:50:40,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2020-10-13 04:50:40,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 444 transitions. [2020-10-13 04:50:40,027 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 444 transitions. Word has length 411 [2020-10-13 04:50:40,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:40,027 INFO L479 AbstractCegarLoop]: Abstraction has 434 states and 444 transitions. [2020-10-13 04:50:40,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:50:40,027 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 444 transitions. [2020-10-13 04:50:40,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2020-10-13 04:50:40,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:40,030 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:40,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 04:50:40,030 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:40,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:40,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1472157592, now seen corresponding path program 38 times [2020-10-13 04:50:40,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:40,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081582396] [2020-10-13 04:50:40,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:40,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:40,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:40,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:40,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:40,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:40,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:40,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:45,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:45,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 437 [2020-10-13 04:50:45,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:50:45,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5799 [2020-10-13 04:50:45,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:45,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:50:45,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:45,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:50:45,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:46,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:46,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:46,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:46,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:46,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:46,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:46,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:46,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:46,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:46,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:46,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:46,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:46,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3961 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 3600 trivial. 0 not checked. [2020-10-13 04:50:46,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081582396] [2020-10-13 04:50:46,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:46,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:50:46,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991658188] [2020-10-13 04:50:46,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:50:46,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:46,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:50:46,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:50:46,234 INFO L87 Difference]: Start difference. First operand 434 states and 444 transitions. Second operand 23 states. [2020-10-13 04:50:46,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:46,441 INFO L93 Difference]: Finished difference Result 826 states and 846 transitions. [2020-10-13 04:50:46,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:50:46,442 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 429 [2020-10-13 04:50:46,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:46,444 INFO L225 Difference]: With dead ends: 826 [2020-10-13 04:50:46,444 INFO L226 Difference]: Without dead ends: 437 [2020-10-13 04:50:46,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:50:46,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-10-13 04:50:46,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 436. [2020-10-13 04:50:46,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2020-10-13 04:50:46,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 446 transitions. [2020-10-13 04:50:46,454 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 446 transitions. Word has length 429 [2020-10-13 04:50:46,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:46,454 INFO L479 AbstractCegarLoop]: Abstraction has 436 states and 446 transitions. [2020-10-13 04:50:46,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:50:46,455 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 446 transitions. [2020-10-13 04:50:46,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2020-10-13 04:50:46,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:46,457 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:46,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 04:50:46,458 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:46,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:46,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1847515446, now seen corresponding path program 39 times [2020-10-13 04:50:46,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:46,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327689817] [2020-10-13 04:50:46,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:46,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:46,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:46,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking...