/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/Mono3_1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:14:19,793 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:14:19,798 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:14:19,831 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:14:19,832 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:14:19,840 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:14:19,842 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:14:19,846 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:14:19,848 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:14:19,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:14:19,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:14:19,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:14:19,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:14:19,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:14:19,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:14:19,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:14:19,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:14:19,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:14:19,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:14:19,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:14:19,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:14:19,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:14:19,878 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:14:19,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:14:19,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:14:19,894 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:14:19,894 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:14:19,895 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:14:19,897 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:14:19,898 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:14:19,898 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:14:19,899 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:14:19,903 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:14:19,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:14:19,908 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:14:19,908 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:14:19,909 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:14:19,909 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:14:19,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:14:19,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:14:19,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:14:19,912 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 16:14:19,933 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:14:19,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:14:19,935 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:14:19,935 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:14:19,935 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:14:19,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:14:19,935 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:14:19,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:14:19,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:14:19,936 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:14:19,936 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:14:19,936 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:14:19,936 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:14:19,937 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:14:19,937 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:14:19,937 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:14:19,937 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:14:19,937 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:14:19,938 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:14:19,938 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:14:19,938 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:14:19,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:14:19,938 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:14:19,939 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:14:19,939 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:14:19,939 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:14:19,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:14:19,939 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:14:19,940 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:14:19,940 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 16:14:20,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:14:20,245 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:14:20,251 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:14:20,253 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:14:20,253 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:14:20,254 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono3_1.c [2020-10-12 16:14:20,315 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c54fc974/2589ab0a2e034bc1a175eca763cc9b02/FLAG99d743ec1 [2020-10-12 16:14:20,733 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:14:20,734 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/Mono3_1.c [2020-10-12 16:14:20,741 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c54fc974/2589ab0a2e034bc1a175eca763cc9b02/FLAG99d743ec1 [2020-10-12 16:14:21,096 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c54fc974/2589ab0a2e034bc1a175eca763cc9b02 [2020-10-12 16:14:21,105 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:14:21,107 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:14:21,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:14:21,113 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:14:21,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:14:21,118 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:14:21" (1/1) ... [2020-10-12 16:14:21,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4076c4d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:21, skipping insertion in model container [2020-10-12 16:14:21,124 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:14:21" (1/1) ... [2020-10-12 16:14:21,132 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:14:21,153 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:14:21,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:14:21,360 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:14:21,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:14:21,393 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:14:21,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:21 WrapperNode [2020-10-12 16:14:21,393 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:14:21,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:14:21,394 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:14:21,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:14:21,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:21" (1/1) ... [2020-10-12 16:14:21,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:21" (1/1) ... [2020-10-12 16:14:21,415 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:21" (1/1) ... [2020-10-12 16:14:21,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:21" (1/1) ... [2020-10-12 16:14:21,420 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:21" (1/1) ... [2020-10-12 16:14:21,426 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:21" (1/1) ... [2020-10-12 16:14:21,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:21" (1/1) ... [2020-10-12 16:14:21,506 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:14:21,512 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:14:21,512 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:14:21,513 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:14:21,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:21" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:14:21,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:14:21,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:14:21,587 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:14:21,587 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:14:21,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:14:21,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:14:21,587 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:14:21,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:14:21,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:14:21,776 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:14:21,777 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 16:14:21,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:14:21 BoogieIcfgContainer [2020-10-12 16:14:21,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:14:21,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:14:21,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:14:21,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:14:21,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:14:21" (1/3) ... [2020-10-12 16:14:21,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e19309c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:14:21, skipping insertion in model container [2020-10-12 16:14:21,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:21" (2/3) ... [2020-10-12 16:14:21,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e19309c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:14:21, skipping insertion in model container [2020-10-12 16:14:21,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:14:21" (3/3) ... [2020-10-12 16:14:21,798 INFO L109 eAbstractionObserver]: Analyzing ICFG Mono3_1.c [2020-10-12 16:14:21,810 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:14:21,823 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:14:21,834 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:14:21,857 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:14:21,857 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:14:21,858 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:14:21,858 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:14:21,858 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:14:21,858 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:14:21,858 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:14:21,858 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:14:21,875 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-12 16:14:21,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-12 16:14:21,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:21,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:21,882 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:21,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:21,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1713253442, now seen corresponding path program 1 times [2020-10-12 16:14:21,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:21,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419005848] [2020-10-12 16:14:21,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:21,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:22,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:22,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 16:14:22,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:22,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-12 16:14:22,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:22,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:22,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:14:22,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:22,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:14:22,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:22,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:22,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:22,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:22,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:22,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:22,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:14:22,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:22,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:22,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:22,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:22,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:22,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419005848] [2020-10-12 16:14:22,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:14:22,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-12 16:14:22,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369598507] [2020-10-12 16:14:22,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-12 16:14:22,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:22,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-12 16:14:22,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-12 16:14:22,093 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-10-12 16:14:22,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:22,120 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-10-12 16:14:22,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-12 16:14:22,121 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-12 16:14:22,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:22,132 INFO L225 Difference]: With dead ends: 30 [2020-10-12 16:14:22,132 INFO L226 Difference]: Without dead ends: 13 [2020-10-12 16:14:22,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-12 16:14:22,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-12 16:14:22,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-12 16:14:22,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-12 16:14:22,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-10-12 16:14:22,181 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-10-12 16:14:22,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:22,182 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-10-12 16:14:22,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-12 16:14:22,182 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-10-12 16:14:22,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-12 16:14:22,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:22,184 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:22,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:14:22,184 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:22,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:22,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1703094711, now seen corresponding path program 1 times [2020-10-12 16:14:22,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:22,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432919003] [2020-10-12 16:14:22,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:22,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:22,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:22,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:22,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 16:14:22,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:22,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-12 16:14:22,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:22,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:14:22,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:22,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:14:22,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:14:22,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:22,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:22,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:22,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:22,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:22,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:14:22,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:22,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:22,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:22,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:22,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:14:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:22,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432919003] [2020-10-12 16:14:22,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:14:22,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 16:14:22,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39419746] [2020-10-12 16:14:22,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 16:14:22,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:22,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 16:14:22,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 16:14:22,376 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2020-10-12 16:14:22,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:22,406 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-10-12 16:14:22,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 16:14:22,407 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-12 16:14:22,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:22,408 INFO L225 Difference]: With dead ends: 24 [2020-10-12 16:14:22,409 INFO L226 Difference]: Without dead ends: 16 [2020-10-12 16:14:22,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 16:14:22,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-12 16:14:22,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-12 16:14:22,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-12 16:14:22,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-12 16:14:22,416 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-10-12 16:14:22,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:22,416 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-12 16:14:22,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 16:14:22,417 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-12 16:14:22,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 16:14:22,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:22,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:22,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:14:22,418 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:22,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:22,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1264308876, now seen corresponding path program 1 times [2020-10-12 16:14:22,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:22,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521641477] [2020-10-12 16:14:22,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:22,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:22,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:22,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:22,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:22,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 16:14:22,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:22,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 392 [2020-10-12 16:14:22,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:22,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:14:22,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:22,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 16:14:22,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:14:22,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:22,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:22,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:22,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:22,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:22,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:22,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:14:22,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:22,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:22,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:22,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:22,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:22,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:22,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521641477] [2020-10-12 16:14:22,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:22,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:14:22,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851094052] [2020-10-12 16:14:22,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:14:22,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:22,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:14:22,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:14:22,930 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 6 states. [2020-10-12 16:14:22,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:22,981 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-10-12 16:14:22,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:14:22,981 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-12 16:14:22,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:22,984 INFO L225 Difference]: With dead ends: 23 [2020-10-12 16:14:22,984 INFO L226 Difference]: Without dead ends: 18 [2020-10-12 16:14:22,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:14:22,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-12 16:14:22,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-12 16:14:22,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-12 16:14:22,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-12 16:14:22,992 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-10-12 16:14:22,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:22,992 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-12 16:14:22,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:14:22,993 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-12 16:14:22,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 16:14:22,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:22,994 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:22,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:14:22,994 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:22,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:22,995 INFO L82 PathProgramCache]: Analyzing trace with hash 127284375, now seen corresponding path program 2 times [2020-10-12 16:14:22,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:22,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643742960] [2020-10-12 16:14:22,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:23,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:23,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:23,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:23,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:23,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:23,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:14:23,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:14:23,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-12 16:14:23,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:23,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:14:23,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:23,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:14:23,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:23,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:23,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:23,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:23,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:23,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:23,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:14:23,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:23,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:23,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:23,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:23,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:23,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:23,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643742960] [2020-10-12 16:14:23,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:23,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:14:23,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457505494] [2020-10-12 16:14:23,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:14:23,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:23,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:14:23,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:14:23,476 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 7 states. [2020-10-12 16:14:23,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:23,557 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-10-12 16:14:23,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:14:23,558 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-12 16:14:23,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:23,560 INFO L225 Difference]: With dead ends: 33 [2020-10-12 16:14:23,560 INFO L226 Difference]: Without dead ends: 27 [2020-10-12 16:14:23,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:14:23,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-12 16:14:23,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2020-10-12 16:14:23,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-12 16:14:23,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-10-12 16:14:23,569 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2020-10-12 16:14:23,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:23,569 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-10-12 16:14:23,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:14:23,569 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-10-12 16:14:23,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 16:14:23,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:23,570 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:23,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:14:23,571 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:23,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:23,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1902291737, now seen corresponding path program 1 times [2020-10-12 16:14:23,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:23,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412709182] [2020-10-12 16:14:23,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:23,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:23,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:23,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:23,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:23,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:14:23,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:23,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-12 16:14:23,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:23,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:14:23,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:23,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:14:23,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:23,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:23,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:23,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:23,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:23,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:23,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:23,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:23,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:23,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:23,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:23,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:23,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:23,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:23,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412709182] [2020-10-12 16:14:23,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:23,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 16:14:23,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042846787] [2020-10-12 16:14:23,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:14:23,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:23,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:14:23,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:14:23,758 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2020-10-12 16:14:23,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:23,815 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2020-10-12 16:14:23,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:14:23,817 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-12 16:14:23,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:23,818 INFO L225 Difference]: With dead ends: 38 [2020-10-12 16:14:23,819 INFO L226 Difference]: Without dead ends: 22 [2020-10-12 16:14:23,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:14:23,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-12 16:14:23,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-12 16:14:23,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-12 16:14:23,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-12 16:14:23,831 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2020-10-12 16:14:23,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:23,832 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-12 16:14:23,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:14:23,833 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-12 16:14:23,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 16:14:23,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:23,834 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:23,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:14:23,834 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:23,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:23,835 INFO L82 PathProgramCache]: Analyzing trace with hash 2057483924, now seen corresponding path program 3 times [2020-10-12 16:14:23,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:23,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301346391] [2020-10-12 16:14:23,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:23,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:23,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:23,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:23,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:23,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:24,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:24,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:24,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 16:14:24,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:14:24,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 404 [2020-10-12 16:14:24,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:24,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:14:24,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:24,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:14:24,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:24,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:24,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:24,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:24,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:24,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:24,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:14:24,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:24,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:24,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:24,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:24,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:24,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:24,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301346391] [2020-10-12 16:14:24,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:24,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:14:24,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895607446] [2020-10-12 16:14:24,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:14:24,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:24,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:14:24,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:14:24,397 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2020-10-12 16:14:24,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:24,477 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-10-12 16:14:24,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:14:24,478 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-12 16:14:24,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:24,479 INFO L225 Difference]: With dead ends: 29 [2020-10-12 16:14:24,479 INFO L226 Difference]: Without dead ends: 24 [2020-10-12 16:14:24,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:14:24,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-12 16:14:24,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-12 16:14:24,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-12 16:14:24,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-12 16:14:24,485 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2020-10-12 16:14:24,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:24,486 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-12 16:14:24,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:14:24,486 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-12 16:14:24,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:14:24,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:24,487 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:24,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 16:14:24,487 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:24,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:24,488 INFO L82 PathProgramCache]: Analyzing trace with hash -684877961, now seen corresponding path program 4 times [2020-10-12 16:14:24,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:24,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150090469] [2020-10-12 16:14:24,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:24,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:24,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:24,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:24,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:24,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:24,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:24,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:24,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:14:24,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:14:24,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 364 [2020-10-12 16:14:24,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:24,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:14:24,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:24,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:14:24,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:14:24,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:24,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:24,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:24,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:24,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:24,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:24,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:24,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:24,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:24,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:24,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:14:24,981 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:24,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150090469] [2020-10-12 16:14:24,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:24,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:14:24,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818772798] [2020-10-12 16:14:24,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:14:24,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:24,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:14:24,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:14:24,984 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 9 states. [2020-10-12 16:14:25,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:25,110 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2020-10-12 16:14:25,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:14:25,111 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-12 16:14:25,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:25,112 INFO L225 Difference]: With dead ends: 47 [2020-10-12 16:14:25,112 INFO L226 Difference]: Without dead ends: 39 [2020-10-12 16:14:25,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:14:25,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-12 16:14:25,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-10-12 16:14:25,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 16:14:25,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-12 16:14:25,120 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 22 [2020-10-12 16:14:25,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:25,120 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-12 16:14:25,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:14:25,121 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-12 16:14:25,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 16:14:25,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:25,122 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:25,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 16:14:25,122 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:25,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:25,123 INFO L82 PathProgramCache]: Analyzing trace with hash 480110516, now seen corresponding path program 5 times [2020-10-12 16:14:25,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:25,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412280425] [2020-10-12 16:14:25,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:25,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:25,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:25,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:25,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:25,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:25,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:25,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:25,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:25,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 16:14:25,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 16:14:25,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 649 [2020-10-12 16:14:25,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:25,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:14:25,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:25,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 16:14:25,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:25,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:25,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:25,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:25,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:25,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:25,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:25,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:25,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:25,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:25,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:25,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:25,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:25,908 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:25,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412280425] [2020-10-12 16:14:25,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:25,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:14:25,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373699027] [2020-10-12 16:14:25,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:14:25,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:25,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:14:25,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:14:25,911 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 10 states. [2020-10-12 16:14:26,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:26,036 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2020-10-12 16:14:26,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:14:26,037 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-12 16:14:26,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:26,038 INFO L225 Difference]: With dead ends: 63 [2020-10-12 16:14:26,038 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 16:14:26,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:14:26,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 16:14:26,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-10-12 16:14:26,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 16:14:26,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-10-12 16:14:26,046 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 25 [2020-10-12 16:14:26,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:26,046 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-10-12 16:14:26,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:14:26,046 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-10-12 16:14:26,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:14:26,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:26,047 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:26,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 16:14:26,048 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:26,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:26,048 INFO L82 PathProgramCache]: Analyzing trace with hash -978890153, now seen corresponding path program 6 times [2020-10-12 16:14:26,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:26,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726342541] [2020-10-12 16:14:26,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:26,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:26,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:26,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:26,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:26,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:26,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:26,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:26,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:27,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:27,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:14:27,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:14:27,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1450 [2020-10-12 16:14:27,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:27,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:14:27,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:27,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 16:14:27,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:27,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:27,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:27,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:27,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:27,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:27,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:27,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:27,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:27,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:27,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:27,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:27,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726342541] [2020-10-12 16:14:27,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:27,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:14:27,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355360840] [2020-10-12 16:14:27,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:14:27,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:27,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:14:27,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:14:27,647 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 11 states. [2020-10-12 16:14:27,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:27,797 INFO L93 Difference]: Finished difference Result 70 states and 90 transitions. [2020-10-12 16:14:27,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:14:27,797 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-12 16:14:27,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:27,799 INFO L225 Difference]: With dead ends: 70 [2020-10-12 16:14:27,799 INFO L226 Difference]: Without dead ends: 60 [2020-10-12 16:14:27,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:14:27,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-12 16:14:27,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2020-10-12 16:14:27,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 16:14:27,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-10-12 16:14:27,806 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 28 [2020-10-12 16:14:27,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:27,806 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-10-12 16:14:27,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:14:27,807 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-10-12 16:14:27,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:14:27,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:27,808 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:27,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 16:14:27,809 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:27,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:27,809 INFO L82 PathProgramCache]: Analyzing trace with hash -183715815, now seen corresponding path program 2 times [2020-10-12 16:14:27,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:27,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061632085] [2020-10-12 16:14:27,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:27,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:27,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:27,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:27,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:27,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:27,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:27,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:28,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:29,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:29,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:14:29,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 16:14:29,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1754 [2020-10-12 16:14:29,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:29,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:14:29,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:14:29,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 16:14:29,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:30,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:30,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:30,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:30,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:30,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:30,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:30,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:30,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:30,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:30,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:30,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:30,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:14:30,320 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:30,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061632085] [2020-10-12 16:14:30,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:30,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:14:30,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356590250] [2020-10-12 16:14:30,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:14:30,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:30,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:14:30,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:14:30,323 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 9 states. [2020-10-12 16:14:34,792 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-10-12 16:14:35,434 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 19 [2020-10-12 16:14:36,161 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 19 [2020-10-12 16:14:37,288 WARN L193 SmtUtils]: Spent 865.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 17 [2020-10-12 16:14:41,523 WARN L193 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 45 DAG size of output: 17 [2020-10-12 16:14:47,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:47,535 INFO L93 Difference]: Finished difference Result 133 states and 182 transitions. [2020-10-12 16:14:47,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 16:14:47,536 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-12 16:14:47,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:47,537 INFO L225 Difference]: With dead ends: 133 [2020-10-12 16:14:47,538 INFO L226 Difference]: Without dead ends: 128 [2020-10-12 16:14:47,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=134, Invalid=285, Unknown=1, NotChecked=0, Total=420 [2020-10-12 16:14:47,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-12 16:14:47,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 38. [2020-10-12 16:14:47,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 16:14:47,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-12 16:14:47,546 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 28 [2020-10-12 16:14:47,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:47,546 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-12 16:14:47,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:14:47,547 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-12 16:14:47,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 16:14:47,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:47,548 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:47,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 16:14:47,548 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:47,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:47,549 INFO L82 PathProgramCache]: Analyzing trace with hash -981754828, now seen corresponding path program 3 times [2020-10-12 16:14:47,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:47,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597030881] [2020-10-12 16:14:47,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:47,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:47,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:47,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:47,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:47,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:47,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:47,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:47,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:47,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:47,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:48,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:51,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:52,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:52,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 16:14:52,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 16:14:52,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 16:14:52,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:52,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:14:52,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:52,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 16:14:52,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:52,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:52,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:52,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:52,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:52,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:52,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:52,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:14:52,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:52,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:52,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:52,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:52,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:52,754 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-12 16:14:52,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597030881] [2020-10-12 16:14:52,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:52,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:14:52,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562696758] [2020-10-12 16:14:52,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:14:52,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:52,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:14:52,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:14:52,757 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 11 states. [2020-10-12 16:14:52,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:52,894 INFO L93 Difference]: Finished difference Result 117 states and 147 transitions. [2020-10-12 16:14:52,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:14:52,895 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-12 16:14:52,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:52,896 INFO L225 Difference]: With dead ends: 117 [2020-10-12 16:14:52,897 INFO L226 Difference]: Without dead ends: 112 [2020-10-12 16:14:52,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:14:52,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-12 16:14:52,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 83. [2020-10-12 16:14:52,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-12 16:14:52,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2020-10-12 16:14:52,918 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 37 [2020-10-12 16:14:52,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:52,919 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2020-10-12 16:14:52,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:14:52,919 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2020-10-12 16:14:52,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 16:14:52,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:52,924 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:52,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 16:14:52,925 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:52,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:52,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1193486935, now seen corresponding path program 4 times [2020-10-12 16:14:52,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:52,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884502804] [2020-10-12 16:14:52,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:52,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:52,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:52,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:53,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:53,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:53,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:53,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:53,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:53,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:53,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:53,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:54,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:57,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:57,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:57,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 16:14:57,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 16:14:57,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 16:14:57,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:57,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:14:57,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:57,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 16:14:57,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:14:58,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:58,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:58,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:58,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:58,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:58,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:58,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:58,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:58,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:58,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:58,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:58,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:58,136 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-12 16:14:58,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884502804] [2020-10-12 16:14:58,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:58,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:14:58,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906518449] [2020-10-12 16:14:58,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:14:58,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:58,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:14:58,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:14:58,139 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand 11 states. [2020-10-12 16:14:58,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:58,320 INFO L93 Difference]: Finished difference Result 201 states and 259 transitions. [2020-10-12 16:14:58,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:14:58,321 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-10-12 16:14:58,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:58,323 INFO L225 Difference]: With dead ends: 201 [2020-10-12 16:14:58,323 INFO L226 Difference]: Without dead ends: 196 [2020-10-12 16:14:58,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:14:58,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-12 16:14:58,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 113. [2020-10-12 16:14:58,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-12 16:14:58,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 144 transitions. [2020-10-12 16:14:58,345 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 144 transitions. Word has length 40 [2020-10-12 16:14:58,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:58,346 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 144 transitions. [2020-10-12 16:14:58,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:14:58,346 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 144 transitions. [2020-10-12 16:14:58,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 16:14:58,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:58,348 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:58,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 16:14:58,348 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:58,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:58,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1334035545, now seen corresponding path program 5 times [2020-10-12 16:14:58,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:58,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798830583] [2020-10-12 16:14:58,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:58,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:58,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:58,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:58,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:58,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:58,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:58,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:58,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:58,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:58,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:58,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:58,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:02,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:03,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:03,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 16:15:03,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 16:15:03,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 16:15:03,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:03,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:15:03,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:03,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 16:15:03,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:03,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:03,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:03,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:03,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:03,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:03,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:03,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:03,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:03,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:03,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:03,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:03,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-12 16:15:03,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798830583] [2020-10-12 16:15:03,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:03,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:15:03,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061176200] [2020-10-12 16:15:03,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:15:03,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:03,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:15:03,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:15:03,528 INFO L87 Difference]: Start difference. First operand 113 states and 144 transitions. Second operand 12 states. [2020-10-12 16:15:03,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:03,756 INFO L93 Difference]: Finished difference Result 258 states and 335 transitions. [2020-10-12 16:15:03,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:15:03,756 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-12 16:15:03,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:03,758 INFO L225 Difference]: With dead ends: 258 [2020-10-12 16:15:03,758 INFO L226 Difference]: Without dead ends: 252 [2020-10-12 16:15:03,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:15:03,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-12 16:15:03,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 152. [2020-10-12 16:15:03,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-12 16:15:03,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 196 transitions. [2020-10-12 16:15:03,788 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 196 transitions. Word has length 40 [2020-10-12 16:15:03,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:03,789 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 196 transitions. [2020-10-12 16:15:03,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:15:03,789 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 196 transitions. [2020-10-12 16:15:03,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 16:15:03,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:03,790 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:03,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 16:15:03,791 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:03,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:03,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1354286420, now seen corresponding path program 6 times [2020-10-12 16:15:03,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:03,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281035144] [2020-10-12 16:15:03,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:03,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:03,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:03,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:03,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:03,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:03,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:03,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:04,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:04,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:04,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:04,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:04,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:05,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:07,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:08,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:08,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 16:15:08,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 16:15:08,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 16:15:08,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:08,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:15:08,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:08,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 16:15:08,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:08,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:08,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:08,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:08,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:08,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:08,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:08,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:08,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:08,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:08,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:08,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:08,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 16:15:08,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281035144] [2020-10-12 16:15:08,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:08,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:15:08,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139740423] [2020-10-12 16:15:08,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:15:08,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:08,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:15:08,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:15:08,940 INFO L87 Difference]: Start difference. First operand 152 states and 196 transitions. Second operand 11 states. [2020-10-12 16:15:09,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:09,098 INFO L93 Difference]: Finished difference Result 237 states and 307 transitions. [2020-10-12 16:15:09,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:15:09,099 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-10-12 16:15:09,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:09,100 INFO L225 Difference]: With dead ends: 237 [2020-10-12 16:15:09,100 INFO L226 Difference]: Without dead ends: 232 [2020-10-12 16:15:09,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:15:09,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-12 16:15:09,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 215. [2020-10-12 16:15:09,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-12 16:15:09,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 280 transitions. [2020-10-12 16:15:09,146 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 280 transitions. Word has length 43 [2020-10-12 16:15:09,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:09,147 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 280 transitions. [2020-10-12 16:15:09,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:15:09,147 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 280 transitions. [2020-10-12 16:15:09,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 16:15:09,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:09,150 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:09,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 16:15:09,150 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:09,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:09,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1494835030, now seen corresponding path program 7 times [2020-10-12 16:15:09,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:09,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303986492] [2020-10-12 16:15:09,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:09,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:09,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:09,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:09,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:09,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:09,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:09,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:09,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:09,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:09,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:09,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:09,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:09,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:12,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:14,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:14,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 16:15:14,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 16:15:14,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 16:15:14,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:14,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:15:14,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:14,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 16:15:14,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:14,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:14,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:14,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:14,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:14,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:14,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:14,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:14,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:14,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:14,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:14,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:14,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:14,323 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-12 16:15:14,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303986492] [2020-10-12 16:15:14,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:14,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:15:14,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31704907] [2020-10-12 16:15:14,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:15:14,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:14,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:15:14,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:15:14,325 INFO L87 Difference]: Start difference. First operand 215 states and 280 transitions. Second operand 12 states. [2020-10-12 16:15:14,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:14,518 INFO L93 Difference]: Finished difference Result 357 states and 467 transitions. [2020-10-12 16:15:14,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:15:14,518 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-12 16:15:14,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:14,520 INFO L225 Difference]: With dead ends: 357 [2020-10-12 16:15:14,520 INFO L226 Difference]: Without dead ends: 351 [2020-10-12 16:15:14,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:15:14,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-10-12 16:15:14,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 236. [2020-10-12 16:15:14,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-12 16:15:14,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 308 transitions. [2020-10-12 16:15:14,552 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 308 transitions. Word has length 43 [2020-10-12 16:15:14,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:14,552 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 308 transitions. [2020-10-12 16:15:14,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:15:14,552 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 308 transitions. [2020-10-12 16:15:14,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 16:15:14,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:14,553 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:14,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 16:15:14,554 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:14,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:14,554 INFO L82 PathProgramCache]: Analyzing trace with hash 985361940, now seen corresponding path program 8 times [2020-10-12 16:15:14,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:14,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686857165] [2020-10-12 16:15:14,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:14,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:14,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:14,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:14,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:14,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:14,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:14,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:14,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:14,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:14,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:15,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:15,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:18,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:19,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:19,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 16:15:19,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 16:15:19,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4879 [2020-10-12 16:15:19,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:19,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:15:19,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:19,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 16:15:19,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:19,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:19,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:19,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:19,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:19,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:19,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:19,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:19,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:19,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:19,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:19,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:19,625 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-12 16:15:19,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686857165] [2020-10-12 16:15:19,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:19,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:15:19,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248440002] [2020-10-12 16:15:19,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:15:19,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:19,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:15:19,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:15:19,627 INFO L87 Difference]: Start difference. First operand 236 states and 308 transitions. Second operand 13 states. [2020-10-12 16:15:19,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:19,845 INFO L93 Difference]: Finished difference Result 405 states and 531 transitions. [2020-10-12 16:15:19,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 16:15:19,846 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-10-12 16:15:19,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:19,848 INFO L225 Difference]: With dead ends: 405 [2020-10-12 16:15:19,848 INFO L226 Difference]: Without dead ends: 398 [2020-10-12 16:15:19,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:15:19,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-10-12 16:15:19,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 272. [2020-10-12 16:15:19,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-12 16:15:19,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 356 transitions. [2020-10-12 16:15:19,884 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 356 transitions. Word has length 43 [2020-10-12 16:15:19,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:19,884 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 356 transitions. [2020-10-12 16:15:19,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:15:19,885 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 356 transitions. [2020-10-12 16:15:19,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 16:15:19,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:19,886 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:19,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 16:15:19,886 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:19,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:19,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1451758281, now seen corresponding path program 9 times [2020-10-12 16:15:19,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:19,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219971271] [2020-10-12 16:15:19,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:19,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:19,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:19,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:19,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:19,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:19,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:20,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:20,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:20,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:20,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:20,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:20,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:20,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:20,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:24,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:24,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 16:15:24,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 16:15:24,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 16:15:24,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:24,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:15:24,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:15:24,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 16:15:24,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:27,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:27,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:27,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:27,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:27,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:27,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:27,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:27,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:27,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:27,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:27,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:27,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:27,379 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 23 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:27,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219971271] [2020-10-12 16:15:27,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:27,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 16:15:27,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946290607] [2020-10-12 16:15:27,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 16:15:27,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:27,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 16:15:27,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=171, Unknown=1, NotChecked=0, Total=210 [2020-10-12 16:15:27,383 INFO L87 Difference]: Start difference. First operand 272 states and 356 transitions. Second operand 15 states. [2020-10-12 16:15:29,918 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-10-12 16:15:36,781 WARN L193 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 82 DAG size of output: 19 [2020-10-12 16:15:41,711 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 17 [2020-10-12 16:15:51,756 WARN L193 SmtUtils]: Spent 4.48 s on a formula simplification. DAG size of input: 45 DAG size of output: 17 [2020-10-12 16:15:55,684 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 61 DAG size of output: 19 [2020-10-12 16:15:58,180 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 17 [2020-10-12 16:16:06,124 WARN L193 SmtUtils]: Spent 3.32 s on a formula simplification. DAG size of input: 80 DAG size of output: 17 [2020-10-12 16:16:07,848 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 19 [2020-10-12 16:16:19,531 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-10-12 16:16:22,496 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 19 [2020-10-12 16:16:27,158 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 19 [2020-10-12 16:16:32,374 WARN L193 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 66 DAG size of output: 17 [2020-10-12 16:16:40,491 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 68 DAG size of output: 19 [2020-10-12 16:16:43,401 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 19 [2020-10-12 16:16:45,646 WARN L193 SmtUtils]: Spent 856.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 17 [2020-10-12 16:16:51,397 WARN L193 SmtUtils]: Spent 4.99 s on a formula simplification. DAG size of input: 75 DAG size of output: 19 [2020-10-12 16:17:06,204 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 80 DAG size of output: 17 [2020-10-12 16:17:13,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:13,467 INFO L93 Difference]: Finished difference Result 560 states and 734 transitions. [2020-10-12 16:17:13,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 16:17:13,468 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2020-10-12 16:17:13,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:13,470 INFO L225 Difference]: With dead ends: 560 [2020-10-12 16:17:13,471 INFO L226 Difference]: Without dead ends: 555 [2020-10-12 16:17:13,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 90.6s TimeCoverageRelationStatistics Valid=568, Invalid=1486, Unknown=16, NotChecked=0, Total=2070 [2020-10-12 16:17:13,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2020-10-12 16:17:13,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 56. [2020-10-12 16:17:13,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 16:17:13,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2020-10-12 16:17:13,496 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 46 [2020-10-12 16:17:13,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:13,497 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2020-10-12 16:17:13,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 16:17:13,497 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2020-10-12 16:17:13,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 16:17:13,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:13,498 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:13,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 16:17:13,498 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:13,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:13,498 INFO L82 PathProgramCache]: Analyzing trace with hash -29206060, now seen corresponding path program 10 times [2020-10-12 16:17:13,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:13,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130632285] [2020-10-12 16:17:13,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:13,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:13,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:13,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:13,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:13,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:13,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:13,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:13,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:13,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:13,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:13,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:14,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:14,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:14,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:15,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:15,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:18,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:18,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 16:17:18,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-12 16:17:18,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 16:17:18,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:18,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:17:18,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:18,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 16:17:18,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:18,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:18,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:18,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:18,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:18,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:18,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:18,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:17:18,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:18,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:18,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:18,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:18,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:18,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130632285] [2020-10-12 16:17:18,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:18,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:17:18,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629264271] [2020-10-12 16:17:18,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:17:18,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:18,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:17:18,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:17:18,864 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand 18 states. [2020-10-12 16:17:19,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:19,508 INFO L93 Difference]: Finished difference Result 139 states and 176 transitions. [2020-10-12 16:17:19,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 16:17:19,509 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2020-10-12 16:17:19,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:19,510 INFO L225 Difference]: With dead ends: 139 [2020-10-12 16:17:19,510 INFO L226 Difference]: Without dead ends: 96 [2020-10-12 16:17:19,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:17:19,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-12 16:17:19,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-12 16:17:19,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-12 16:17:19,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2020-10-12 16:17:19,536 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 55 [2020-10-12 16:17:19,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:19,536 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2020-10-12 16:17:19,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:17:19,536 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2020-10-12 16:17:19,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-12 16:17:19,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:19,537 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 16, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:19,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 16:17:19,537 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:19,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:19,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1045016183, now seen corresponding path program 11 times [2020-10-12 16:17:19,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:19,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846618580] [2020-10-12 16:17:19,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:19,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:19,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:19,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:19,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:19,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:19,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:20,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:20,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:20,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:21,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:21,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:23,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:24,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:24,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 16:17:24,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 16:17:24,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 16:17:24,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:24,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 16:17:24,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:24,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-12 16:17:24,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:25,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:25,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:25,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:25,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:25,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:25,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:25,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:25,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:25,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:25,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:25,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:25,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 55 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:25,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846618580] [2020-10-12 16:17:25,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:25,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 16:17:25,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786685804] [2020-10-12 16:17:25,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 16:17:25,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:25,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 16:17:25,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:17:25,369 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand 30 states. [2020-10-12 16:17:27,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:27,093 INFO L93 Difference]: Finished difference Result 175 states and 211 transitions. [2020-10-12 16:17:27,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 16:17:27,094 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 94 [2020-10-12 16:17:27,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:27,095 INFO L225 Difference]: With dead ends: 175 [2020-10-12 16:17:27,095 INFO L226 Difference]: Without dead ends: 132 [2020-10-12 16:17:27,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:17:27,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-12 16:17:27,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-10-12 16:17:27,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-12 16:17:27,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 143 transitions. [2020-10-12 16:17:27,135 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 143 transitions. Word has length 94 [2020-10-12 16:17:27,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:27,135 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 143 transitions. [2020-10-12 16:17:27,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 16:17:27,135 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 143 transitions. [2020-10-12 16:17:27,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-12 16:17:27,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:27,137 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 28, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:27,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 16:17:27,137 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:27,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:27,137 INFO L82 PathProgramCache]: Analyzing trace with hash 265942967, now seen corresponding path program 12 times [2020-10-12 16:17:27,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:27,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978250965] [2020-10-12 16:17:27,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:27,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:27,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:27,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:28,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:28,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:28,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:28,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:28,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:31,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:32,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:32,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-12 16:17:32,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:17:32,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-12 16:17:32,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:32,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 16:17:32,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:32,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-12 16:17:32,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:33,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:33,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:33,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:33,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:33,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:33,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:33,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:33,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:33,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:33,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:33,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 499 proven. 1855 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-12 16:17:33,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978250965] [2020-10-12 16:17:33,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:33,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 16:17:33,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115311379] [2020-10-12 16:17:33,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 16:17:33,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:33,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 16:17:33,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:17:33,415 INFO L87 Difference]: Start difference. First operand 131 states and 143 transitions. Second operand 38 states. [2020-10-12 16:17:35,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:35,964 INFO L93 Difference]: Finished difference Result 199 states and 231 transitions. [2020-10-12 16:17:35,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 16:17:35,965 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 130 [2020-10-12 16:17:35,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:35,966 INFO L225 Difference]: With dead ends: 199 [2020-10-12 16:17:35,967 INFO L226 Difference]: Without dead ends: 156 [2020-10-12 16:17:35,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:17:35,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-12 16:17:36,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2020-10-12 16:17:36,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-12 16:17:36,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 167 transitions. [2020-10-12 16:17:36,019 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 167 transitions. Word has length 130 [2020-10-12 16:17:36,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:36,020 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 167 transitions. [2020-10-12 16:17:36,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 16:17:36,020 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 167 transitions. [2020-10-12 16:17:36,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-12 16:17:36,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:36,023 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 36, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:36,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 16:17:36,024 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:36,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:36,024 INFO L82 PathProgramCache]: Analyzing trace with hash 984855351, now seen corresponding path program 13 times [2020-10-12 16:17:36,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:36,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637931658] [2020-10-12 16:17:36,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:36,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:36,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:37,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:37,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:37,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:39,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:39,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:41,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:41,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-12 16:17:41,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:17:41,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 16:17:41,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:41,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-12 16:17:41,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:41,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-12 16:17:41,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:42,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:42,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:42,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:42,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:42,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:42,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:42,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:42,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:42,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:42,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:42,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:42,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:42,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 833 proven. 2542 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-12 16:17:42,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637931658] [2020-10-12 16:17:42,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:42,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-12 16:17:42,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174781891] [2020-10-12 16:17:42,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-12 16:17:42,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:42,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-12 16:17:42,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 16:17:42,732 INFO L87 Difference]: Start difference. First operand 155 states and 167 transitions. Second operand 44 states. [2020-10-12 16:17:46,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:46,412 INFO L93 Difference]: Finished difference Result 217 states and 247 transitions. [2020-10-12 16:17:46,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 16:17:46,413 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 154 [2020-10-12 16:17:46,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:46,415 INFO L225 Difference]: With dead ends: 217 [2020-10-12 16:17:46,415 INFO L226 Difference]: Without dead ends: 174 [2020-10-12 16:17:46,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 16:17:46,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-12 16:17:46,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2020-10-12 16:17:46,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-12 16:17:46,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 185 transitions. [2020-10-12 16:17:46,456 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 185 transitions. Word has length 154 [2020-10-12 16:17:46,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:46,456 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 185 transitions. [2020-10-12 16:17:46,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-12 16:17:46,456 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 185 transitions. [2020-10-12 16:17:46,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-12 16:17:46,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:46,458 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 42, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:46,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 16:17:46,459 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:46,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:46,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1216912343, now seen corresponding path program 14 times [2020-10-12 16:17:46,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:46,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509788908] [2020-10-12 16:17:46,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:46,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:48,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:48,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:49,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:51,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:51,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:51,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-12 16:17:51,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:17:51,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 16:17:51,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:51,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-12 16:17:51,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:51,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-10-12 16:17:51,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:53,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:53,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:53,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:53,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:53,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:53,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:53,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:53,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:53,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:53,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:53,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:53,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:53,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 1073 proven. 3197 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-12 16:17:53,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509788908] [2020-10-12 16:17:53,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:53,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-12 16:17:53,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595539223] [2020-10-12 16:17:53,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-12 16:17:53,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:53,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-12 16:17:53,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:17:53,434 INFO L87 Difference]: Start difference. First operand 173 states and 185 transitions. Second operand 49 states. [2020-10-12 16:17:57,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:57,598 INFO L93 Difference]: Finished difference Result 232 states and 261 transitions. [2020-10-12 16:17:57,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 16:17:57,600 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 172 [2020-10-12 16:17:57,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:57,602 INFO L225 Difference]: With dead ends: 232 [2020-10-12 16:17:57,602 INFO L226 Difference]: Without dead ends: 189 [2020-10-12 16:17:57,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:17:57,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-12 16:17:57,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2020-10-12 16:17:57,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-12 16:17:57,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 200 transitions. [2020-10-12 16:17:57,645 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 200 transitions. Word has length 172 [2020-10-12 16:17:57,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:57,645 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 200 transitions. [2020-10-12 16:17:57,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-12 16:17:57,645 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 200 transitions. [2020-10-12 16:17:57,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-12 16:17:57,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:57,647 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 47, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:57,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 16:17:57,648 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:57,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:57,648 INFO L82 PathProgramCache]: Analyzing trace with hash -117388652, now seen corresponding path program 15 times [2020-10-12 16:17:57,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:57,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341834603] [2020-10-12 16:17:57,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:57,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:58,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:01,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:02,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:02,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:02,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:02,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-12 16:18:02,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:18:02,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-12 16:18:02,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:02,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-12 16:18:02,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:02,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 156 [2020-10-12 16:18:02,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:04,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:04,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:04,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:04,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:04,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:04,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:04,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:04,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:04,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:04,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:04,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:04,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 1188 proven. 3927 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-12 16:18:04,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341834603] [2020-10-12 16:18:04,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:04,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-12 16:18:04,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74088917] [2020-10-12 16:18:04,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-12 16:18:04,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:04,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-12 16:18:04,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 16:18:04,993 INFO L87 Difference]: Start difference. First operand 188 states and 200 transitions. Second operand 54 states. [2020-10-12 16:18:10,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:10,085 INFO L93 Difference]: Finished difference Result 247 states and 276 transitions. [2020-10-12 16:18:10,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-12 16:18:10,089 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 187 [2020-10-12 16:18:10,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:10,092 INFO L225 Difference]: With dead ends: 247 [2020-10-12 16:18:10,092 INFO L226 Difference]: Without dead ends: 204 [2020-10-12 16:18:10,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 16:18:10,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-12 16:18:10,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2020-10-12 16:18:10,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-12 16:18:10,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 215 transitions. [2020-10-12 16:18:10,144 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 215 transitions. Word has length 187 [2020-10-12 16:18:10,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:10,144 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 215 transitions. [2020-10-12 16:18:10,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-12 16:18:10,144 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 215 transitions. [2020-10-12 16:18:10,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-12 16:18:10,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:10,146 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 52, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:10,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 16:18:10,147 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:10,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:10,147 INFO L82 PathProgramCache]: Analyzing trace with hash 135768631, now seen corresponding path program 16 times [2020-10-12 16:18:10,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:10,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423306667] [2020-10-12 16:18:10,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:10,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:13,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:15,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:15,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-10-12 16:18:15,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:15,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5077 [2020-10-12 16:18:15,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:15,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-12 16:18:15,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:15,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 162 [2020-10-12 16:18:15,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:17,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:17,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:17,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:17,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:17,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:17,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:17,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:17,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:17,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:17,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:17,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:17,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 1717 proven. 4240 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-12 16:18:17,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423306667] [2020-10-12 16:18:17,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:17,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-12 16:18:17,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66056061] [2020-10-12 16:18:17,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-12 16:18:17,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:17,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-12 16:18:17,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2918, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 16:18:17,717 INFO L87 Difference]: Start difference. First operand 203 states and 215 transitions. Second operand 56 states. [2020-10-12 16:18:23,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:23,237 INFO L93 Difference]: Finished difference Result 253 states and 279 transitions. [2020-10-12 16:18:23,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-12 16:18:23,237 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 202 [2020-10-12 16:18:23,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:23,239 INFO L225 Difference]: With dead ends: 253 [2020-10-12 16:18:23,239 INFO L226 Difference]: Without dead ends: 210 [2020-10-12 16:18:23,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=162, Invalid=2918, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 16:18:23,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-12 16:18:23,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2020-10-12 16:18:23,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-12 16:18:23,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 221 transitions. [2020-10-12 16:18:23,288 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 221 transitions. Word has length 202 [2020-10-12 16:18:23,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:23,288 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 221 transitions. [2020-10-12 16:18:23,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-12 16:18:23,288 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 221 transitions. [2020-10-12 16:18:23,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-10-12 16:18:23,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:23,291 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 54, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:23,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 16:18:23,291 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:23,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:23,291 INFO L82 PathProgramCache]: Analyzing trace with hash 282440983, now seen corresponding path program 17 times [2020-10-12 16:18:23,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:23,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909754086] [2020-10-12 16:18:23,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:23,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:23,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:23,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:28,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:28,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 216 [2020-10-12 16:18:28,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:28,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-12 16:18:28,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:28,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 70 [2020-10-12 16:18:28,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:28,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 205 [2020-10-12 16:18:28,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:31,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:31,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:31,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:31,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:31,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:31,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:31,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:31,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:31,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:31,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:31,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:31,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0